One end each of resistance, capacitor C and resistance 2r are connected together. The other ends are respectively connected to the positive terminals of batteries. P, Q. R having respectively emf's E, E and 2E. The negative terminals of the batteries are then connected together. In this circuit, with steady current the potential drop across the capacitor is

Options

A. `E/3`
B. `E/2`
C. `2E/3`
D. E

Answer

(a)

Explanation

In steady state, no current flows through capacitor.
The potentiaol drop across the capacitor is ,
` V = ir = E/3r xx r = E/3`