Question

Name a device that helps to maintain a potential difference across a conductor.

Answer 1

Potential difference:

1. It can be defined as the amount of difference in energy that charge carriers have between two points namely anode and cathode in a circuit.
2. Potential difference is measured in volts $\left(V\right)$ and is also known as voltage.
3. It is also defined as the amount of work, that has been done in moving a unit charge from one point to another.

Device:

1. Sources of electricity like a battery or a cell can help to maintain an accurate potential difference across a conductor.
2. A cell is a singular device that converts chemical energy into electric energy.
3. A Battery is a device, which consists of many electrical cells.

Thus, both battery and cell are devices that help to maintain a potential difference across a conductor.