Working of Voltmeter

Question

I can't understand the working of the analog voltmeter. An analog voltmeter is made by combining high resistance with a pivoted coil galvanometer which essentially works when CURRENT passes through it. On the other hand, we are told that no current passes through the voltmeter as its resistance is very high. So if no current passes through it, how is voltmeter able to measure potential difference. What is the exact thing happening that makes it work?

Answer 1

You're right that it uses a galvanometer. It uses a highly sensitive one and in fact it does draw current, just very little as to cause as little disturbance as possible to the circuit.