Question

Name a device which helps to maintain a potential difference across a conductor?

Answer 1

Answer:

Any source of electricity like the battery, cell, power supply, etc. helps to maintain a potential difference across a conductor.

Answer 2

Answer:

it is a battery or cell

Explanation:

we know that a cell has to keep expending its chemical enery to maintain the potential difference. hence cell, battery or power supply is used to maintain potential difference.