Question

Why is the resistance of an ideal voltmeter infinite?

Answer 1

Answer:

As we know that we have to connect voltmeter in parallel to any element to know the voltage across it

So while connecting voltmeter to any circuit we are indirectly providing another path for current to flow from,which in turn change the actual current flowing from desired path and this creates error in measuring of voltage

But if we connect the voltmeter with infinite resistance (ideally),no current can flow from the voltmeter and there will be zero error in the measured voltage.

Answer 2

Explanation:

Since voltmeter is connected in parallel with the element whose voltage is going to be measured, for an ideal voltmeter no current should flow through it, all current should pass through the connected resistance so that its voltage can be accurately measured by voltmeter. For no flow of current through voltmeter, we need infinite resistance.

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