Question

The work done in moving a charge of 8 C from a point of potential 140 V to point of potential 180 V

112J

1120J

320J

1440J

​

Answer 1

Potential energy = 40 V

charge = 8C

Potential energy = work done / charge

40 = work done / 8

40×8 = work done

320 = work done

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Answer 2

Answer:

Explanation:

If potential difference is taken as V, work done W and the charge moved as Q then the relationship is :

V = W/Q

b) We know by the above that V = W/Q

So, the needed potential difference = 230 - 220 = 10 V

Charge = 4 C

10 = W/4

W = 40 J

So the work done is 40 J

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