Question

In the adjoining figure, four capacitors are shown with the respective capacities and the $PD$ applied. The charge and the $PD$ across the $4\mu F$ capacitor will be:

• A. $600\mu C;150V$
• B. $300\mu C;75V$
• C. $800\mu C;200V$
• D. $580\mu C;145V$

Answer 1

The correct option is D $580\mu C;145V$

Formula,

$Q=CV$

$=(\frac{1}{20}+\frac{1}{8}+\frac{1}{12})\times 300=1161\mu C$

Charge through $4\mu F=\frac{1161}{2}=580\mu C$

Potential difference across $4\mu F=\frac{580}{4}=145V$