Question

Two concentric metallic shell's of radius Rand 2R, out of which the inner shell is having charge Q and outer shell is uncharged. If they are connected with a conducting wire. Then,

• A. Q amount of charge will flow from inner to outer shell.
• B. Q/e number of electrons will flow from outer to inner shell, where e charge on electron.
• C. $\frac{K{Q}^2}{4R}$ amount of heat is produced in the wire
• D. $\frac{K{Q}^2}{2R}$ amount of heat is produced in the wire

Answer 1

Answer: (A), (B), (C)

Q/e number of electrons will flow from outer to inner shell, where e charge on electron.
Q amount of charge will flow from inner to outer shell.
$\frac{K{Q}^2}{4R}$ amount of heat is produced in the wire

The potential of the two surface will be equal when the whole charge Q flows from inner to other shell

$Q=ne$

$n=\frac{Q}{e}$