In: Physics
Two capacitors C1 = 2 µF and C2 = 6 µF are connected in parallel across a 11 V battery. They are carefully disconnected so that they are not discharged and are reconnected to each other with positive plate to negative plate and negative plate to positive plate (with no battery).
(a) Find the potential difference across each capacitor after they are connected.
V (2 µF capacitor) .
V (6 µF capacitor)
(b) Find the initial and final energy stored in the capacitors.
mJ (initial)
mJ (final)
Charges on each capacitor will be
When the Capacitor will be connected with opposite polarity then, total charge will be
As they connected in parallel hence the charge will distribute
among the two in such way so that they have the same potential. Let
the charge on
is
then the charge on
will be
. Hence,
Hence charge on
will be
Potential across each capacitor will be
(2) Initial energy stored in
was,
Initial energy stored in
was,
final energy stored in
was,
Final energy stored in
was,