Discus electromotive force with example

Answer 1

Electromotive force (EMF) is the electrical potential difference or voltage that is maintained between the terminals of a source of electrical energy, such as a battery or generator. It is the force that pushes or drives the flow of electric charge in a circuit.

An example of electromotive force is a battery. A battery is a device that converts chemical energy into electrical energy. Within a battery, chemical reactions occur that create a potential difference between its terminals, resulting in an electromotive force. When a circuit is connected to the battery, the electromotive force drives the flow of electrons through the circuit, providing the necessary energy to power the connected devices.

For instance, consider a flashlight powered by a battery. The battery has an electromotive force that pushes the flow of electrons from its negative terminal to its positive terminal. When the flashlight is switched on, the electromotive force drives the flow of current through the circuit, powering the light bulb and allowing it to emit light.

In summary, electromotive force is the force or voltage that causes the flow of electric charge in a circuit, and it is often provided by sources of electrical energy such as batteries or generators.