Question

The___________is used to apply a potential difference between two ends of a

conductor.​

Answer 1

Answer:

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

The instrument which is used to measure the potential difference between the two ends of the conductor is called the 'Voltmeter'. Voltmeter is used to measure the potential difference between two points in the circuit.

Answer 2

Refer the attachment friend....