Which one is not used in verifying Ohm’s law?

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Ammeter

Voltmeter

Resistance

Rheostat

answer is C.

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Detailed Solution

Resistance is not used in verifying Ohm’s law.
Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. Ammeter, Voltmeter and Rheostat all are needed to verify Ohm’s law. One can see the change in current with the change of resistance using an ammeter and measure the voltage across the rheostat to verify it mathematically.

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