In the circuit shown in figure-3.311, the switch is shifted from position I to 2 at time t = 0. The switch was initially in position I for a long time. The graph between charge on capacitor C and time tis best represented as

Options

A.
B.
C.
D.

Answer

D

Explanation

______`-Cepsi`
______`+Cepsi`
`q=2Cepsi-[2Cepsi-(-Cepsi)]e^(t)/(2RC)`
`" " =2Cepsi-3Cepsi e^ (t)/(2RC)`
initial charge`=-Cepsi`
final charge `=2Cepis`