BITSAT 2019 Paper

(a) C = equivalent capacitance
∴

1

C

=

1

2

+

1

3

+

1

6

⇒ C = 1 µF
Charge on each capacitor in series circuit will be same.
∴ q = CV = (1 x 10‌−6) x 10 = 10 µC
∴ Charge across 3 pF capacitor will be 10 µC.