Question

is not an emf device.

• A. Electric Generator
• B. Battery
• C. Solar Cell
• D. Capacitor

Answer 1

The correct option is D Capacitor

All these devices except the capacitor use some other form of energy to convert it into electrical potential energy.
An electric Generator converts mechanical energy into electric potential energy.
A battery converts chemical energy into electric potential energy.
However, a capacitor is more like a spring which only stores electrical energy.