Question

The capacitors shown in figure has been charged to a potential difference of V volts,so that it carries a charge CV with both the switches S1 and S2 remaining open. Switch S1 is closed at t = 0. At t = R1 C switch S1 is opened and S2 is closed. Find the charge on the capacitor at t = 2 R1 C + R2 C.

Answer 1

When t < R1 C

when S2 is closed,

t = t0

At instant t (t > t0 )

But t = 2R1 C + R2 C

Putting the value,