Question

To study the dependence of current (I) on the potential difference (V) across a resistor, the correct way of connecting the ammeter and voltmeter in the circuit is:
(1) ammeter and voltmeter both are connected in series
(2) ammeter is connected in parallel and voltmeter in series
(3) ammeter is connected in series and voltmeter in parallel
(4) ammeter and voltmeter both are connected in parallel

Answer 1

In any circuit, the ammeter should be connected in series and the voltmeter should be connected in parallel.

An ammeter is a low impedance device, it should be connected in series so that all of the current passes through it and the actual current flowing in the circuit can be measured. While a voltmeter is a high impedance device, it should be connected in parallel so that a zero or minimum amount of current flows through it and the actual voltage drop across the component can be measured.

Hence, the correct answer is option 3.