Question

10.Capacitors of capacities 5uf and 10 uf are connected in parallel in a
circuit with a cell of emf 2V. What should be the capacity of the capacitor
to be connected in series with the parallel combination of the capacitors
to get 1 uc charge on the combination?​

Answer 1

Answer:

Before inserting plate:-

Charge gained =6μc and electric field =300/cm

the voltage developed across the plates,

V=E.d=300×5=1500V

Thus capacitance c=

V

Q

=

1500

6×10

−6

=4×10

−9

=4nF

now the mental plate in not dieretric i.e when inserted it would not generate the reverse field and thus the capacitance wouldn't be affected

final capacitance 4×10

−9

=4nF