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A galvanometer is used as a _________

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in Electrical Measurements by (148k points)
A galvanometer is used as a  _________

(a) current source

(b) voltage source

(c) null detector

(d) input impedance

I got this question by my school principal while I was bunking the class.

My doubt stems from Wheatstone Bridge Balance Condition in division Measurement of Resistance of Electrical Measurements

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Best answer
Correct answer is (c) null detector

The best I can explain: A galvanometer is used as a null detector to detect the flow of current across the ends of the two opposite junctions of the circuit. Voltage source is used for providing the required dc supply to the bridge.

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