Find the work done to transfer $10^{19}$ charge from point A to B which is maintained at a potential difference of 5 volts.

8 J

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10 J

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5 J

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1 J

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Solution

The correct option is A
8 J

Q = $10^{19}$ $\times$ 1.6 $\times$ $10^{- 19}$ = 1.6
We know, V = $\frac{W}{Q}$
W = QV
W = 1.6 $\times$ 5 = 8 J

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