Question

Define a device that helps to maintain a pd across a conductor

Answer 1

Answer:

Voltmeter

Voltmeter has to be connected in parallel in order to work.

Voltmeter has high resistance.

Voltmeter is used to measure the potential difference between two points of a current carrying conductor.

Answer 2

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• A battery consisting of one or more electric cells is used to maintain a potential difference across a conductor.