Question

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

Answer 1

A battery consists of a group of cells to produce a potential difference. ... Both battery as well as a cell help in maintaining a potential difference across a conductor.

Answer 2

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Potential difference can be defined as the difference in energy that charge carriers have between two points in a circuit. The potential difference (p.d.) is measured in volts (V) and is also known as voltage. The potential difference between any two points is defined as the amount of work done in moving a unit charge from one point to another.

The device that helps to maintain a potential difference:-

Any source of electricity like the battery or cell helps to maintain a potential difference across a conductor. A cell is a single unit device that converts chemical energy into electric energy. A Battery is a device consisting of one or more electrical cells that convert chemical energy into electrical energy. A battery usually consists of a group of cells.