Question

A parallel plate air condenser of capacity 10 µF is charged to a potential of 1000 V. The energy of the condenser is ______

Options

• 5 J

• 4 J

• 2.5 J

• 10 J

Answer 1

A parallel plate air condenser of capacity 10 µF is charged to a potential of 1000 V. The energy of the condenser is 5 J.

Explanation:

The energy of the condenser = `1/2`CV²

= `1/2 xx 10 xx 10^-6 xx (1000)^2`

= `0.5 xx 10 xx 10^-6 xx 10^6` = 5 J