Three capacitors of capacities `12muF, 6muF and 4muF` are connected in series and a potential difference of 20 V is applied to their combination. What is the cahrge on the capacitor of `4muF` ?

Options

A. `20muC`
B. `40muC`
C. `30muC`
D. `50muC`

Answer

B

Explanation

`(1)/(C)=(1)/(4)+(1)/(6)+(1)/(12)=(6)/(12)`
`therefore C=2muF`
`Q=CV=2xx10^(-6)xx20=40muC`
Every capacitory has the same charge.