Question

Why should voltmeter have high resistance

Answer 1

Answer:

A voltmeter measures the voltage difference between two different points (say, on different sides of a resistor), but it should not change the amount of current going through the element between those two points. So, it should have very high resistance so that it doesn't "draw" current through it.

Answer 2

Answer:

It should have high resistance so that the current would not pass through it and it would not f

Draw current through it.

Hope it helps

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