Three capacitors A,B and C are connected in a circuit as shown in figure. What is the charge in `muC` on the capacitor B?

Options

A. `1//3`
B. `2//3`
C. `1`
D. `4//3`

Answer

B

Explanation

Capacitors B and C are in paralle, then A is in series, `C_(eq)=(2xx(3+4))/(2+(3+4))=(14)/(9)muF`.
`Q=C_(eq)V=(14)/(9)(7-6)=(14)/(9)muC`.
Q will be divided between B and C. so change on B is `q=(3xx(14//9))/(3+4)=(2)/(3)muC`.