In the circuit shown, a potential difference of `60V` is applied acrodd.`AB`. The potential difference between the point `M` and `N` is-

Options

A. 60 V
B. 45 V
C. 40 V
D. 30 V

Answer

D

Explanation

In figure, `C_(1)=2C, C_(2)=CandC_(3)=2C` are in series
`therefore" "1/C_(S)=1/(2C)+1/C+1/(2C)=4/(2C)`
`therefore" "C_(S)=C/2`
Now `V_(2)=Q/C_(2)=(C_(S)*V)/C_(2)=C/2xx60/C=30V`