Question

name a device that helps to maintain a potential difference across a conductor​

Answer 1

Hey Mate

Here is your answer

'Battery' or some other source of electricity i.e  cell or power supply etc but if you write battery only than also it is the correct answer

Hope it helps you

Answer 2

Answer:

Potential difference at the ends of a conductor is maintained by connecting a battery or a dry cell across the ends. Potential difference is maintained in a cell or battery