Question

A capacitor is charged through a potential difference of 200 V, when 0.1 C charge is stored in it. The amount of energy released by it, when it is discharged is:

• A. 5 J
• B. 10 J
• C. 20 J
• D. 2.5 J

Answer 1

The correct option is B 10 J

Here, $V=200V,q=0.1C$
Energy stored, $U=\frac{1}{2}qV=\frac{1}{2}\times 0.1\times 200=10J$
When the capacitor is discharged, it releases the same amount of energy i.e., $10J$