Question

In the given circuit, a charge of $+ 80\, \mu C$ is given to upper plate of a $4\, \mu F$ capacitor. At steady state the charge on the upper plate of the $3 \, \mu F$ capacitor is

• A. $60\, \mu C $
• B. $48\, \mu C $
• C. $80\, \mu C $
• D. $0\, \mu C $

Answer 1

Answer: (B)

The net charge on upper plates both capacitor $(2 \mu F$ and $3 \mu F$ ) will be $+80 \mu C$, so charge on upper plate of $3 \mu C$ capacitor will be
$q=\left(\frac{3}{3+2}\right)(80 \,\mu C ) $
$q=\frac{3}{5} \times 80=48\,\mu C$