What is the resistance of an ideal voltmeter and ammeter?

The resistance of an ideal voltmeter is infinite ((\infty\Omega)), ensuring that no current flows through it when measuring voltage across a component in a circuit. This prevents the voltmeter from affecting the circuit's operation or altering the voltage it is measuring24.

Conversely, an ideal ammeter has a resistance of zero ((0\Omega)), allowing all the circuit's current to pass through it without any voltage drop. This ensures accurate measurement of the current flowing through the circuit without disrupting it245.