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Standard XII

Physics

Electric Potential Due to a Solid Sphere of Charge

Two spherical...

Question

Two spherical conductors $A$ and $B$ of radii $R$ and $2 R$ respectively are each given a charge $Q$ . When they are connected by a metallic wire. The charge will

Flow from

A

B

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Flow from

B

A

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Remain stationary on conductor

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None of these

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Solution

The correct option is A Flow from $A$ to $B$
As we know that Charge flows from higher to lower potential or Q/C ratio.

For sphere $A$ , $V_{A} = \frac{K Q}{R}$

For sphere $B$ , $V_{B} = \frac{K Q}{2 R}$

$\Rightarrow V_{A} > V_{B}$

Therefore, charge flow from $A$ to $B$

Hence, option (a) is the correct answer.

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