Question

Two concentric metallic shells of radii R and 2R are placed in vacuum. 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 is charge on an 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 amount of charge will flow from inner to outer shell
$\frac{K{Q}^2}{4R}$ amount of heat is produced in the wire
Q/e number of electrons will flow from outer to inner shell, where e is charge on an electron

charge will flow from inner shell to outer

amount of heat produced is $\frac{K{Q}^2}{2R}-\frac{K{Q}^2}{4R}=\frac{K{Q}^2}{4R}$

$Q=ne$

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