At what point along the line joining them is the potential zero? You also have the option to opt-out of these cookies. In addition to attracting opposite charges, like charges repel each other. What is electrostatic shielding how can it be achieved? This can be represented as: Ex=dVdx E x = dV dx . Physics questions and answers. (a) True or False: Draw the electric potential line at the point where the electric potential is zero. Consider two charges +Q and -Q separated by a distance d. At the midpoint of the charges of the electric dipole, the electric field due to the charges is non zero, but the electric potential is zero. Why positive charge is considered as higher potential? How can you tell which plate has higher potential? 8 Is the electric potential of the Earth Zero? One of the most common terms we discuss in evaluating electricity is voltage. The strength of an electrical field depends on the direction of the electric potential. For a better experience, please enable JavaScript in your browser before proceeding. This cookie is set by GDPR Cookie Consent plugin. Physics. What is the relation between electric field and potential? The positive plate is at a higher potential than the negative plate. Is the electric field necessarily zero at a point where the potential is zero explain why or why not? The electric potential is like the height of a mountain and the electric field its slope. So your question is similar to at what height are there The negative sign shows that the work is done against the direction of the field. What is the electric potential between two opposite charges? An electron with a potential difference of one volt will gain approximately one eV of energy. Since E=0, therefore the potential V inside the surface is constant. The energy of an electron will increase if it moves through a voltage of 150 volts. Electric potential is a function of the electric field and the charge at that point These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. When a dipole is immersed in a uniform electric field, as illustrated in Figure 16.4. The more energy required for the move, the higher the electric potential. Electric potential necessarily need not be 0 if the electric field at that point is zero. What did Britain do when colonists were taxed? Physics questions and answers. Its value will be positive due the charge being positive. What does it mean if electric potential is 0? 0 V / m 2) y 2. Analytical cookies are used to understand how visitors interact with the website. Since the charges have equal magnitude and the distance from each to the mid point is the same, the magnitude of the potential energy contributed by each charge is the same, but the signs are opposite, so the net potential energy should be zero. This means that it requires a lot of work to move a charge from plate A to plate B. A higher voltage creates a stronger electric field in the circuit, and the electric potential energy per charge increases. The electric potential at points in an x y plane is given by V = (2. Ideally speaking, a diode is expected to offer zero resistance when forward biased and infinite resistance when reverse biased. However, no device can ever be ideal. Thus, practically speaking, every diode is seen to offer a small resistance when forward biased, and a considerable resistance when reverse biased. 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This cookie is set by GDPR Cookie Consent plugin. We are not responsible for third party purchases that generate from a referral on this site. Does higher voltage mean higher potential? What is the electric potential at point B? The potential in Equation at infinity is chosen to be zero. Thus, for a point charge decreases with distance, whereas for a point charge decreases with distance squared: Recall that the electric potential V is a scalar and has no direction, whereas the electric field is a vector. A greater electrical field creates a stronger electric field within the circuit. You are using an out of date browser. If the potential is constant then the electric field is zero. The cookies is used to store the user consent for the cookies in the category "Necessary". 1 Is electric field is zero when potential constant? Originally Answered: The potential is constant throughout a given region of space. The site earns commission for referring traffic and business to Amazon and other companies like Clickbank, Commission Junction and Share A Share ETC linked to on this site. The electric potential at a point is measured in Volts or JC-1. If the potential is constant, then the slope of the potential is zero, which means the electric field is zero. Hence, the electric potential is not zero when the electric field Is zero. Therefore, the electric field is 0 at . The region inside a hollow metal sphere or Faraday cage has zero electric field. But the potential of the sphere could be a million volts reference Equipotential surface is a surface which has equal potential at every Point on it. Potential Energy of an Electric Dipole in a Uniform Field, Electric field of a moving charge that's abruptly stopped. See if you can find the electric field due to these two charges at a location y = 0.01 and x = 0.0 meters. It is measured in volts, and work is measured in joules. The electric potential at points in an x y plane is given by V = (2. The total potential at the point will be the algebraic sum of the individual potentials created by each charge. What zero potential means, roughly, is that the charges in your system have cancelled out. When both the electric field and local potential are not considered, the quantized conductance near zero energy is G = 8e 2 /h due to the eightfold degeneracy of the zeroth LLs. 3, the net force on the dipole is zero because the force on the positive charge will always be equal and in the opposite direction from the force on the negative charge. If you place the -1 C charge 1 cm away from the point then the So, the resultant potential difference from point Ato point B would be equal. Once the electric field or local potential is added, the quantized conductance around zero energy is G = 2(n + 1)e 2 /h with n = 1, 2, 3, . Thus, the work done by electric force to move a 1 C of charge from point A to point B is 0 J. What is high potential and low potential in electricity. Answer: The electric potential in equatorial position of an electric dipole is zero. I set up the potential and try to solve as follows: I've done this a few times, even with some different numbers, and I keep getting the same answer of 599.2, but this is incorrect. The electric field can be accelerated by a small amount of voltage, as the electrons mass is small. If the energy of an electron increases and decreases, this movement is called the electric field. The radius at point B is the same as in point A, hence potential energy of an electron at point B is the same as at point A. The electric potential is zero at an infinite distance from the point charge. In general, the zero field point for opposite sign charges will be on the outside of the smaller magnitude charge. We know that the electric field directed from a higher electric potential to a lower electric potential. The relationship between potential and field (E) is a differential: electric field is the gradient of potential (V) in the x direction. By clicking Accept All, you consent to the use of ALL the cookies. You may want to use WD-40 to unscrew it, but it is also possible Let over 25 years experience in the electrical industry answer any question you have! Electric Dipole Electric Field on Equatorial Transversal Line. Then using above equation one can easily say that when acceleration is zero change in velocity is zero ,so velocity of object is a constant. Also we must not overlook the fact that when a body is at rest its acceleration is zero,so velocity is zero. It may not display this or other websites correctly. It is possible to calculate the energy of an electron with the help of electron guns. The electric field of a point charge is given by the Coulomb force law: F=k*q1*q2/r2 where k is the Coulomb constant, q1 and q2 are the charges of the two point charges, and r is the distance between the two charges. Is the electric field necessarily zero at a point where the potential is zero explain why or why not? If potential is negative, the direction of an electric field is perpendicular to the surface. Physics. Can someone please help to show me where exactly I am going wrong? But potential is always measured relative to a baseline, so it can therefore be considered as zero. This is called a zero-gradient electric field. Negatively- charged electrons are removed from atoms, the atoms being left as positive ions. There is a spot along the line connecting the charges, just to the far side of the positive charge (on the side away from the negative charge) where the electric field is zero. Is the electric potential V constant in space? What are annual and biennial types of plants? The electric potential at a point is proportional to the force that moves the charge. The electric potential due to a negative point charge is V 2 = k q / r 2 where is the distance to the opposite charge. Physics questions and answers. What zero potential means, roughly, is that the charges in your system have cancelled out. How about this? The region inside a hollow metal sphere or Faraday cage has zero electric field. But the potential of the sphere could be a million volts reference Despite the term electrical field, its not actually a force but a potential energy. I. The cookie is used to store the user consent for the cookies in the category "Analytics". Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. If so, it is important to know how to remove a stuck spark plug. The electric field is a vector field, so it has both a magnitude and a direction. Voltage is the difference in electrical potential between two points (energy per unit charge). In the above figure, the electric field directed towards point B from point A, therefore, we can say that point A has a higher electric potential. We are not liable in anyway for incorrect information. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Equipotential surface is a surface which has equal potential at every Point on it. Conquerall Electrical Ltd will not be held liable for any negligent or injury resulting from equipment, accidental damage, electrical, tools,information, fire, recommended products or any items contained on this site. At the midpoint between the charges, the electric field due to the charges is zero, but the electric potential due to the charges at that same point is non-zero. The definition of electric potential varies by system, but the SI unit is the volt. If the given location is a region with no field then the charge can be moved freely anywhere within that region without any additional work. Hence, electric potential changes rapidly when moving toward a charge. Because the electric potential is zero at the center of the equation, two (b) Find the position at which the electric potential is zero with respect to the red positive charge. The electric potential from a single charge is defined to be zero an infinite distance from the charge, and the electric potential associated with two charges is also defined to be zero when the charges are infinitely far apart. If the electric field at a certain point is zero, then the electric potential at the same point is also zero. Electric Dipole Electric Field on Equatorial Transversal Line. The potential difference between the two causes the electrons to be attracted back, producing a flow of electric charge: current electricity. Without any electric field, how could you possibly have an electric potential? Is the sun always directly overhead at noon at the equator? There must be a potential difference (i.e. 7 Can a potential have physical significance if the field is zero? Can electric potential at any point in space is zero? What is the work done by the electric force to move a 1 C charge from A to B? The electrostatic potential has physical meaning only in terms of its differences between one location and another; the electric field is the gradi Without any electric field, how could you possibly have an Electric potential at a point is positive if it is close to a charged positive particle, and negative if it is far from that charged positive particle. In other words, the electric potential of a point X is equal to its potential in all directions. If the potential is constant then the electric field is zero. Having a starter that has the proper terminals is important. The density of the electric field is proportional to the amount of charge and work that it takes to move a point charge. This is why voltage is also a measure of how quickly the electric potential changes. I'm really confused. When a charge passes through a battery, its electric potential changes. The cookie is used to store the user consent for the cookies in the category "Other. What is the potential difference moving 0.2 meters along a 49.1 V/m uniform electric field? II. This made sense to me until I got to a part about conductors. In which regions is the electric field zero? Is electric potential zero when electric field is zero? The electric potential is zero when the distance between the point charge and the potential is infinite. If you move towards a positive charge, the potential will increase from 0 to some positive value getting more positive as you get closer to the positive charge. Physics ExplainedChapter 2: The Electric PotentialIn this video: A 4 nC charge is at the origin and a -3 nC charge is at x = 0.1. If potential is zero, the direction of an electric field is perpendicular to the surface. Begin typing your search term above and press enter to search. For instance, at a point mid-way between two equal and similar charges, the electric field strength is zero but the electric potential is not zero. What is wrong with crossing electric fields? It may not display this or other websites correctly. The higher potential is the point of higher concentration of charges and lower potential is the point with a lesser concentration of charges. Gauss law in electrostatics states that the electric flux passing through a closed surface is equal to the ratio of the charge enclosed by the surface to the permittivity of the medium. More generally, the potential at a given location is the amount of work per unit charge that you will have to do to slowly move that charge from a defined reference point to the given location. The energy of an electron increases if the electrical potential of its neighbor increases. Thus, as the test charge is moved in the x direction, the rate of the its change in potential is the value of the electric field. In addition to the voltage, another important measurement is the electrical field. To account for electric potential energy, an electric potential is defined. The resulting energy is equivalent to the amount of work done. When the potential of the electric field is zero, the potential of the electric field is also zero. The definition of an electric field is the amount of energy required to slowly move a charge. Using a simplified example, we will discuss the effects of an electrical field on a small, stationary charge. b. Related to your specific question, if the electric field is constant, then the slope of the potential is a constant which means that the potential is changing linearly. What is the electric potential at the point on the x-axis where the electric field is zero? This cookie is set by GDPR Cookie Consent plugin. If the potential energy of two points is zero, the electrons energy remains constant. At the midpoint of the charges of the electric dipole, the electric field due to the charges is non zero, but the electric potential is zero. The electric conductor having excess of electrons is said to be at a negative or lower potential and the conductor having deficit of electrons is said to be at a positive or higher potential. The electrical force exerted on each path is equal to the amount of work required to lift the charge from point A to point B. The Coulomb force causes a charged particle to accelerate toward a point 15 cm away from the other. Share Cite Improve this answer Follow. Yes. However, unlike gravitational forces, electric potential energy is independent of the path taken. a) So below is the equation I used but I am getting a negative number for rsomeone please help, this is due by this Friday at midnight! When the electric potential is constant the electric field is zero? An electric charge is said to be zero potential The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". This potential is inversely related to the permittivity of the surrounding space, and to the distance from the point charge. Essentially yes. 0 m ? Therefore, position affects both the electric field and the potential. The relationship between potential and field (E) is a differential: electric field is the gradient of potential (V) in the x direction. Science. In an isolated system No, it is not at all compulsory for the volatge to be zero. Going by the formula of electric field we know that E=dV/dr Thus A 8.00nC point charge and a+16.0nC point charge Express your answer with the appropriate units. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Withing the kinetic molecular theory of gases it was expected that if absolute zero could be reached the particles making up the material would all stop moving. The particle kinetic energies would all be zero. But even in this overturned view, the gas as a whole could still have kinetic energy. (a) No, just because the electric field is zero at a particular point, it does not necessarily mean that the electric potential is zero at that point. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Since the electric field is zero inside the conductor, the mutual repulsion of like charges from Coulombs Law demands that the charges be as far apart as possible. 5 What is the relationship between electric field and electric field strength? At what point on the line joining the two charges is the electric potential zero? This website uses cookies to improve your experience while you navigate through the website. Electrons flow from the negative terminal to the positive. Is electric potential zero when an electric field is zero? So if you have a point with zero potential you can place a new particle there from outside the system (i.e. What is the potential difference between A and B? Even if potential energy is zero, an electric field of zero can exist at any given point. For a better experience, please enable JavaScript in your browser before proceeding. The electric field might be generated for example by two charges: +5C and 4C separated by 2 meters. (i) Equipotential surfaces due to single point charge are concentric sphere having charge at the centre. When an electric field is zero then potentioal may be zero or not The opposite is true for a positive charge. This kinetic energy can't come from thin air, therefore it has to come from the electric potential energy stored in the charges. [9x10^9 (-10.1x10-9)/(r + 0.138m)^2] + [9x10^9(18.9x10-9)/r^2] = 0. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Does current flow from lower to higher potential? Can electric potential be zero when the electric field is not zero? So here is how my book defined electric potential. Is the electric field zero or nonzero in this region, explain? For eg, plastic. Can you double major in nursing and psychology? These cookies track visitors across websites and collect information to provide customized ads. Remove Stuck Spark Plug-Often, your spark plug may be stuck in place. The electric field exerts a force on an electron when it moves from point A to point B. Thanks. The s can cancel out. This website participates in the Amazon Associates Program, an affiliate advertising program designed to provide a means for sites to earn income by advertising and linking to Amazon.com. Electric potential is zero in the middle of a line. Electric potential is the difference between two points the positive and negative charge and it is the gradient of that difference that determines the direction of an electric field. What effects does an electric field have on potential energy? Check your local building codes and electrical inspection authority codes in your area. Do American expats have to pay capital gains tax? Can the electric potential be zero where the electric field is nonzero explain your answer? The information on this website entertainment purposes only. We can find the electric potential due to a point charge (relative to a reference point at infinity) by using the equation below: V = 1 4 0 q r. This website uses cookies to improve your experience while you navigate through the website. The difference between a charged particles potential energy and the electric field is called the voltage. When the angle between the dipole moment and electric field is 180 then the potential energy of electric dipole is maximum. (a) No, just because the electric field is zero at a particular point, it does not necessarily Can an electric potential exist at a point in? Yes, electric potential can be zero at a point even when the electric field is not zero at that point. But if there is a field between the region and the reference point then it takes some work to go through that field. But opting out of some of these cookies may affect your browsing experience. When the electric field is zero at a point the potential must also be zero there? You can never know the absolute value of potential $V$, although you know the value of $E$ which is constant in your case. Which side of battery has higher potential? The electric field is zero everywhere within the region. Can electric field at a point be zero,while electric potential is not zero? from infinity) for free. For example exactly half way (or otherwise equidistant from them) between two equal and oppositely charged point charges, potential is zero. 3 Can the electric potential be zero where the electric field is nonzero explain your answer? At this particular point, the electric field is said to be zero. Any net charge on the conductor resides entirely inside the conductor. Secondly, $E$ is a physically measurable quantity but $V$ is not. Thus, as the The positive terminal of a battery is higher in electric potential than the negative terminal by an amount which is equal to the battery voltage. If youre confused about which quantity is more important, start by reading this article. But opting out of some of these cookies may affect your browsing experience. Which point A or B has a larger electric potential? Necessary cookies are absolutely essential for the website to function properly. Electric potential is defined as the amount of work needed to move a unit charge from a reference point to a specific point against the electric field. The work involved is equal to the displacement of the electric force, and the amount of displacement changes according to the speed of the force. His full name is Conte Alessandro Giuseppe Antonio Anastasio Volta, but his name was cut down to the unit name. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. No, because at the centre of the spherical shell matter is not there. The only other thing I'll point out is that the square root of something gives a +/- solution. Take the potential at infinity to be zero. Situation 2: A location near an object where the electric field is zero. 4 In which condition electric field is not zero but electric potential is zero? 1. What causes rear tires to wear on the inside edge? This means that if a unit positive charge is pushed from infinity to point Y, it will be twice as difficult. The electric field intensity is zero at the point p on the line joining them. Why is electric potential zero opposite charges? What happens when electric potential zero? The electric field varies from place to place within the region. Electric field vector takes into account the field's radial direction? 1. In order to determine the amount of work required to move a charge, a reference point is used. I think answer to this is the Earth. (a) No, just because the electric field is zero at a certain point does not necessarily mean that the electric potential is zero at that point. If the rate of change of potential with distance is constant then the electric field strength is constant. Why do you have to swim between the flags? 0 V / m 2) y 2. II. (a) No, just because the electric field is zero at a particular point, it does not necessarily mean that Don't you need an electric field in order for a force to act on a charge which would then give it an electric potential. If the potential is constant, there is no electric field. Is electric field is zero when potential constant? Potential energy is a mathematical concept that gives us insight into the transformation of energy. If a charge is negatively charged, an electric field in the opposite direction will point towards the negative charge. The amount of work performed to move the charge is equal to the potential difference between the two points. It is important to understand how electric potential and its gradient are related to one another. The electric field in terms of the potential is E = V = V x x ^ V y y ^ V z z ^. In the SI, one volt is equal to one joule per coulomb of charge. The flow of electrons is termed electron current. Why is my hair falling out after using minoxidil? And electric potential is the potential difference. 1 Is electric field zero when electric potential is zero? The potential energy of an electron at point B in the figure 2.88 10-16 J. We also use third-party cookies that help us analyze and understand how you use this website. The electric field surrounds every charged particle and acts on all other charged particles. You are using an out of date browser. Electric field is a Force and potential or voltage is the energy required to overcome this force or the energy required to move a particle from one The force acting on a unit positive charge at A is equal to E. Now, the work done in moving a unit positive charge from A to B against the electric field is dW=Edx. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. A good example is the case of Earth has an electric field but it doesnt have any potential.If it would any currents would have been produced. If Theres a point of high potential, where a positive charge would have the highest possible potential energy, and theres a point of low potential, where a charge would have the lowest possible potential energy. Conventional current flows from the positive terminal to the negative. The electric field is vector quantity whereas the electric potential is a scalar this it's not nessecary that when electric field is zero the potential is also zero.Analogous to the example In a one-dimensional situation, the electric field points away from regions with net positive charges, and toward regions of negative charges. Electric force is the result of a charge moving with an energy. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams. III. Conquerall Electrical Ltd advises never to due electrical work yourself , consult with your local licensed electrician. So if Potential Is Zero What Is Electric Field? In the unit-vector notation, what is the electric field at the point 3 . Electrostatic shielding can be achieved by covering the electric field with a non-conductor of electricity. Therefore, volta is the proper name for the volt. Can Spanish and French learn simultaneously? I have tried with positive and negative values of the square root and still the answer is incorrect. 3. Thus the electrons flow from the conductor at lower potential to the conductor at higher potential. Physics. This cookie is set by GDPR Cookie Consent plugin. Is the electric field zero or nonzero in this region? For point charges, our electric force equation is: | F E | = 1 4 0 | q 1 q 2 | r 2. The electric potential is inversely proportional to the strength of the electric field. how As the two charges move closer to each other, the energy of the electron increases. The work required to move a charge is called its electric field. The electric field is constant in an infinite line if potential is zero. It does not store any personal data. In higher dimensions, the electric field traces away from negative charges and towards positive ones. This can be represented as: Ex=dVdx E x = dV dx . The same is true for the proton. If the rate of change of potential with distance is constant then the electric field strength is constant. III. a. If a charge is zero, an electric field is negative. Explain. You also have the option to opt-out of these cookies. Along the line that connects the charges, there exists a point that is located far away from the positive side. Answer: The electric potential in equatorial position of an electric dipole is zero. This relationship is known as the work-energy theorem. (ii) In constant electric field along z-direction, the perpendicular distance between equipotential surfaces remains same. However, higher voltages can produce electron speeds that require the consideration of special relativity. Hence, if a charged particle moves from one point to another, the Coulomb force will also be generated. : the potential is equal across space. When the angle between the (ii) In Why does current flow due to potential difference? Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. The cookie is used to store the user consent for the cookies in the category "Analytics". When a circuit is connected using conductors, an electric field is established in the direction towards lower a potential point from a higher potential point. Analytical cookies are used to understand how visitors interact with the website. If potential is negative, the direction of an electric field is perpendicular to the surface. Where is the electric field zero? The volt is named after the Italian nobleman and physicist Alessandro Volta. They said the electric potential is constant all throughout the conductor, but inside the conductor the electric field is 0. The following diagram shows two paths that a charge can take, one perpendicular to one another. 0 m , 2 . Being infinitely far away from other charges just means the electric potential will be zero. Electric potential is zero in the As with other forms of energy, electric potential energy can be viewed as an analog to gravitational potential energy. For two opposite charges of equal magnitude, the electric potential is zero in the middle since the electric field between both the charges will be equal and opposite. Ok, I am still not understanding what I am doing wrong and why my answer is not right. These terminals are the places where the wires connect. The strength of an electrical field depends on the direction of the electric potential. The electric field of an electron is the force that pushes a charge in one direction and a negative force on another. The Coulomb force, however, equals the difference in kinetic and potential energy between the two charges. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. The outer circle will be 10cm from and I would place another point along said circle and label it . These cookies will be stored in your browser only with your consent. Electrostatic shielding is a barrier that isolates things inside it from an external electric field or vice versa. This method works for all symmetry types. and that a higher voltage means more energy for a coloumb of charge (ie a 9V battery means 9 joules per coloumb). Necessary cookies are absolutely essential for the website to function properly. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. b) What is the magnitude of the electric field at the two points on the x-axis where the This cookie is set by GDPR Cookie Consent plugin. The information on this site is based off the CEC Code not the NEC. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. JavaScript is disabled. This changes the electric potential energy by one coulomb. The distance between two charges decreases the size of the electric force. These cookies will be stored in your browser only with your consent. Since the electric potential is zero at that point, the electric field is also zero. We can explain why this happens by pointing out that the electric field is caused by the potential energy rather than the potential energy itself. However, this does not always happen. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Where V is the electric potential, Q is the charge, and r is the distance in metres. The electric potential V is constant everywhere within a certain region of space. However, you may visit "Cookie Settings" to provide a controlled consent. When a positive test charge q 0 is moved between points A and B in an electric field E, the change in the potential energy of the chargefield system is: Can the electric potential be zero between two positively charged particles? If I place a positive charge in between the 2 charges, it has electric potential energy because it is feels a force towards the negative charge and repelled by the positive and gains kinetic energy. Another way to measure electrical potential is to measure how much work a charge can do against an electric force. If you put another charge in that electric field, an electrostatic force will act on it and give it kinetic energy. These cookies ensure basic functionalities and security features of the website, anonymously. Find out the relationship between the electric field and electric potential include which of the following statement? However because the Electric Potential is 0, thus the electrical potential energy is 0. 0 V / m 2) x 2 (3. This doesn't make sense to me. How is electric potential zero between two opposite charges but the electric field is non zero? There is a point in between them where the potential is 0 (the electric potential is also 0 in the infinite) but in that point the electric field vector is not null. 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