*Know about Different Concept of Electrostatic Potential.***Potential word is used in that sense in electricity as The liquid is used in hydrostatics Temperature is used in heat. To make a clear picture of Potential let us consider some examples: Let A and B be two containers. A is wider and B is narrower. Both are connected through a horizontal tube with stopper T at the center. If both are filled with the same amount of water, the water level will be higher in B than that of A. If stopper T is removed, water flows from B (at a higher level) to A (lower level). This will continue unless and until the level in both the containers become equal. Therefore, the direction of the flow of water depends on the level of water, i.e., on the height or pressure but not on quantity. If contact is made between the two bodies at different temperatures heat flows from the body at a higher temperature to the body at a lower temperature. This process continues unless and until temperature on both bodies become the same. The flow of heat depends upon the difference in the temperature of the bodies but not on the quantity of heat in the bodies. As on pouring the liquid in a container, it's level increases, similarly, on giving charge to a conductor, its potential increases.**

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Consider two charged conductors A and B. The potential of conductor A is more than that of conductor B. If the two conductors are joined by a wire, then charge flows from one conductor to another. The charge flows from the conductor at the higher potential to the conductor at lower potential. The flow of charge remains until the potential of both conductors becomes ammo Conductors joined with wire. Hence, the electric potential of a conductor is the electrical state, which gives the direction of charge flow from one conductor to another. Positive charges always move from high potential to low potential whereas negative charges move from low potential to high potential.

__Potential of Earth:-__**As the height of a place is measured from the sea level, on the same basis, the potential of the conductor is measured with respect to the potential of the earth, which is taken as zero. Earth is a very big conductor, from which if a small amount of charge is taken or given to it, its potential will not change in the same manner if a drop of water is added or taken away from the sea, its level is not going to change. If the potential of a body is more than that of earth, then the potential of the body is said to be positive, if its potential is less than that of earth, then its potential is said to be negative potential. The positively charged bodies are said to be at positive potential while the negatively charged bodies are said to be at a negative potential.**

__Electrostatic Potential, Potential:-__**Difference and their Measurement consider a charge +q placed at point O in space, around which an electric field which is spherically symmetrical is developed, which is directed radially outwards. If a unit positive charge is placed in this field at point P, then a force of repulsion will act on it which will try to move the charge away from charge +q.**

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__Potential difference__Obviously, if the unit positive charged is to be moved from B to A, then some work will be required to be done against the repulsion force. The amount of work done be numerically equal to the potential difference between the two points. Thus, “Electric potential difference between the two points is equal to the amount of work done in carrying unit positive charge from one point to another point in

an electric field”. Potential difference is a scalar quantity. If a charge q is brought from point B to point A in an electric field and work are done in this process is W, then The potential difference between A and B is Thus, "If the work done in bringing a unit positive charge from one point to the other is an electric field is 1 Joule, then the potential difference between the two points is said to be 1 Volt”. Now, if point B is situated at infinity, then from

The potential of a point at infinity is considered to be zero because outside the electric field electrostatic force act on the charge. V = 0 Thus, it is clear that the amount of work done in bringing a unit positive charge from infinity to point A is numerically equal to the potential at point A. Hence, the electrostatic potential at a point in an electric field can be defined as follows: "Electrostatic potential at a point inside the electric field is numerically equal to the amount of work is done in bringing a unit positive charge from infinity to that point." “Electrostatic potential is a scalar quantity.” If the work is done in bringing a charge q from infinity to a point in an electric field is W, then the electrostatic the potential at that point be

__Electric Potential Due to a point charge:-__**Suppose a point charge +q is placed at a point O in a dielectric medium of dielectric constant K. At r.**

distance apart from this charge a point P is taken at which the electrostatic potential is determined As, from the definition of potential, we know that the potential at a point is equal to the amount of work done in bringing a unit positive charge from infinity to that point. So in order to determine the electrostatic potential at that point, we have to calculate work done. The potential at a point due to a point charge. For this purpose at first, we will calculate the small amount of work done is displacing the test charge from A to Bi.e., a small distance dr. The small amount of work will be

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