Question

why should the resistance of:
a) an ammeter be very small?
b) a voltmeter be very large?​

Answer 1

The reason for ammeter resistance to be low is because it can accurately read the current flowing in the circuit. When the ammeter resistance is low, almost all the current in the circuit is allowed to pass through the ammeter.

Now coming to your question, a voltmeter measures the potential difference between two points or across one or more elements in a circuit. ... To get almost the actual value voltmeter needs to have a very high resistance as compared to the resistance of the element(s) across which it measures the voltage.

mark me please