A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the circuit:
(A)ammeter is always used in parallel and voltmeter is series.
(B)both ammeter and voltmeter must be connected in parallel.
(C)ammeter is always connected in series and voltmeter in parallel.✓ Correct
(D)both, ammeter and voltmeter must be connected in series.
Answer: (C)
Solution
To verify Ohm's law we need the current through the resistor and the voltage across it. The ammeter is placed in series with the resistor so that the very current passing through the resistor passes through it, while the voltmeter is connected in parallel across the resistor so that it reads the potential difference developed across it. So the ammeter always goes in series and the voltmeter in parallel.
JEE Main · 2020 · 06 Sep 2020 · Shift 2 · Single correct option
