Question

A
network
of
uncharged
capacitors
and
resistance
is
shown.
Current
through the battery
immediately after
key k is closed and
after long time
interval is
A
W
WW​

Answer 1

Answer:

Let the current in the circuit is I.

Just after the key is closed the capacitor can be replaced as a short circuit.

The current is given as,

I=

R

1

E

After long time capacitor does not allow current to pass through it, so capacitor can be replaced as open circuit.

The current can be written as,

−E+IR

1

+IR

3

=0

I=

R

1

+R

3

E