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Calculate the work done in moving a charge of $4 C$ from a point at $220 V$ to a point at $230 V$ .

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40 J

50 J

60 J

70 J

answer is A.

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Detailed Solution

The work done to move

4 C

charge for a point at

220 V

to a point

230 V

40 J

.
Given, charge q =

4 C

Potential at point A, VA =

220 V

Potential at point B, VB =

230 V

We know the relation between work done and potential difference is

V = Work done / charge moved = W / q

⇒

W = V \times q

⇒

W = (V_{B} - V_{A}) \times q

⇒

W = (230 - 220) \times 4

= 10 \times 4

= 40 J

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