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Potential and Potential Energy Relation

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Difference between expressions of work done by electrostatic force, work done by external agent and potential difference in moving a charge from point a with potential va to point b with potential vb

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20 J

work has to be done to move a

0.05 C

point charge from

A

B

with changing the kinetic energy of point charge by

10 J

. The potential difference

V_{B} - V_{A}

Q. The work done by electric field in carrying a point charge of 5

μ

C from a point A to point B is 10 mJ. The potential difference

V_{A} - V_{B}

Q. (a) State the relation between potential difference, work done and charge moved.
(b) Calculate the work done in moving a charge of 4 coulombs from a point at 220 volts to another point at 230 volts.

Electric potential difference between two points is the work done to move a unit charge from one point to the other.

Q. On moving a charge of 20 C by 2 cm, 2 J of work is done. Find the potential difference between the two points.

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