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Find the work done by some external forc...

Find the work done by some external force in moving a charge `q=2muC` from infinity to a point where electric potential is `10^4` V.

A

`=4xx10^-2J`

B

`=2xx10^-2J`

C

`=2xx10^-3J`

D

`=2xx10^-4J`

Text Solution

Verified by Experts

The correct Answer is:
B
Using the relation
`(W_(oo-a))_("external force")=qV_a`
We have, `(W_(oo-a))_("external force") =(2xx10^-6)(10^4)`
`=2xx10^-2J`
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