Question

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

Hint:

A battery is essentially a combination of two or more cells connected in series or parallel to provide a desired voltage.

Answer 1

Step 1: Understanding the Concept:
To maintain a continuous flow of electric current through a conductor, a constant potential difference must be maintained across its ends.

Step 2: Detailed Explanation:
An electric cell or a battery uses chemical reactions internally to generate and maintain this potential difference.
It acts as an 'electron pump' pushing charges through the external circuit.

Step 3: Final Answer:
A battery or electric cell is the required device.