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Which instrument is used as the null detector in the Wheatstone bridge?

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in Physics – Class 12 by (135k points)
Which instrument is used as the null detector in the Wheatstone bridge?

(a) Voltmeter

(b) Ammeter

(c) Galvanometer

(d) Multimeter

I got this question at a job interview.

My question is based upon Wheatstone Bridge in chapter Current Electricity of Physics – Class 12

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Best answer
The correct option is (c) Galvanometer

For explanation: A galvanometer is used as the null detector in a Wheatstone bridge. The null point means the situation in which no current flows through the circuit. The galvanometer is used for measuring the current and also to determine the voltage between any two points of the circuit. Galvanometer is used due to its sensitivity and therefore, even small currents can be measured.

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