Question:
A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the circuit :
A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the circuit :
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An ammeter has very low resistance and measures the current through the element, so it goes in series; a voltmeter has very high resistance and measures the potential difference across the element, so it goes in parallel.
Updated On: Nov 5, 2026
- Ammeter is always connected in series and voltmeter in parallel
- Both ammeter and voltmeter must be connected in series
- Both ammeter and voltmeter must be connected in parallel
- Ammeter is always used in parallel and voltmeter is series
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The Correct Option is A
Solution and Explanation
To verify Ohm's law we need the current \(I\) through the resistor and the potential difference \(V\) across it.
Ammeter: measures current, so the whole current must pass through it, and it must have very small resistance. It is connected in series with the resistor.
Voltmeter: measures potential difference between two points, so it is connected across (in parallel with) the resistor, and has very large resistance so it draws negligible current.
Hence option (1) is correct; options (2), (3) and (4) are wrong.
Answer: (1) Ammeter is always connected in series and voltmeter in parallel
Ammeter: measures current, so the whole current must pass through it, and it must have very small resistance. It is connected in series with the resistor.
Voltmeter: measures potential difference between two points, so it is connected across (in parallel with) the resistor, and has very large resistance so it draws negligible current.
Hence option (1) is correct; options (2), (3) and (4) are wrong.
Answer: (1) Ammeter is always connected in series and voltmeter in parallel
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