Question

The capacity of a condenser is $4\mu F$ and its potential is $100\text{volts}$. The energy released while discharging of capacitor will be

• A. $0.02\text{Joule}$
• B. $0.04\text{Joule}$
• C. $0.025\text{Joule}$
• D. $0.05\text{Joule}$

Answer 1

The correct option is A $0.02\text{Joule}$

Potential energy lost during discharge of the capacitor is $U=\frac{1}{2}C{V}^2$
Given $C=4\mu F,V=100V$

$U=\frac{1}{2}\times 4\times {10}^{-6}\times (100{)}^2=0.02J$