Question

33. Two capacitors of capacitances 3pF and 5pF are connected in series. Calculate the equivalent
capacitance. If a battery of emf 10V is connected across them, estimate the charge on the 5pF capacitor
and the energy stored in it.​

Answer 1

Answer:

(a) For parallel combination, C

eq

=C

1

+C

2

+C

3

=(2+3+4)pF=9pF

(b) q=V×C

for parallel array, V remains the same across each capacitor.

for C=2 pF

q

1

=VC=100×2×10

−12

=2×10

−10

C

for C=3 pF

q

2

=VC=100×3×10

−12

=3×10

−10

C

for C=4 pF

q

1

=VC=100×4×10

−12

=4×10

−10

C