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Standard XII

Physics

Charging of Capacitors

A charge q is...

Question

A charge q is moved from point A to point B in the electric field of a uniformly charged ring of radius R and charge Q which is placed in exactly at the centre of AB. Find the work done by the agent.

$\frac{1}{4 π ε_{0}} (\frac{Q q}{2 r})$

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$\frac{2 q Q}{4 π ε_{0} r}$

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zero

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None of these

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Solution

The correct option is C
zero

$W = q (V_{B} - V_{A}) S i n c e V_{B} - V_{A} = 0 W = 0$

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A charge q is moved from point A to point B in the electric field of a uniformly charged ring of radius R and charge Q which is placed in exactly at the centre of AB. Find the work done by the agent.

The correct option is C zero W=q(VB−VA)Since VB−VA=0W=0

The correct option is C
zero

$W = q (V_{B} - V_{A}) S i n c e V_{B} - V_{A} = 0 W = 0$