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Standard XII

Physics

Visualising Potential

There are two...

Question

There are two concentric spherical shells of radii $r$ and $2 r$ . Initially a charge $Q$ is given to the inner shell and both the switches are open. Now $S_{2}$ is closed and opened, The charge flowing through the switch $S_{2}$ in the process is

Q

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\frac{Q}{4}

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\frac{Q}{2}

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\frac{2 Q}{3}

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Solution

The correct option is A $Q$
Initially,
Charge on inner sphere = $Q$
Charge on outer sphere = $0$
After the switch is closed the charge will start flowing until the both spheres have an equal charge that is they achieve the same potential. Therefore charge flowing through the switch $S_{2}$ is $Q$ .
Finally both the spheres will have $Z e r o$ charge.

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There are two concentric spherical shells of radii r and 2r. Initially a charge Q is given to the inner shell and both the switches are open. Now S2 is closed and opened, The charge flowing through the switch S2 in the process is

There are two concentric spherical shells of radii $r$ and $2 r$ . Initially a charge $Q$ is given to the inner shell and both the switches are open. Now $S_{2}$ is closed and opened, The charge flowing through the switch $S_{2}$ in the process is