Question

Why do we need capacitor to store energy when we already have battery to do that?

• A. Because capacitor can store a very-very large amount of energy
• B. Because a capacitor can provide the stored energy back relatively slowly
• C. Because a capacitor can provide the stored energy back relatively quickly.
• D. Because batteries are obsolete

Answer 1

The correct option is C Because a capacitor can provide the stored energy back relatively quickly.

A capacitor is used to store energy just like a battery. But a battery has energy stored in form of chemical energy and a capacitor has the energy stored as electrical energy.
So, a capacitor can provide energy really quickly compared to a battery.