Question

Why does a voltmeter have infinite resistance ?

Answer 1

Voltmeter

1. It is a device used for measuring the potential difference between two points.
2. It is connected in parallel with the circuit.
3. When the voltmeter is connected to a circuit, the current will pass through it.
4. This leads to a change in current flow and a change in potential difference.
5. To minimize this, the resistance of the voltmeter is kept very high such that minimum current pass through it.

In an ideal situation, there should be no current passing through the voltmeter, so the resistance should be infinite.