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Pick out the application of potentiometer from the following.

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in Physics – Class 12 by (135k points)
Pick out the application of potentiometer from the following.

(a) It measures current

(b) It measures internal resistance

(c) It measures external resistance

(d) It is used to compare two currents

I have been asked this question in homework.

Query is from Current Electricity topic in portion Current Electricity of Physics – Class 12

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The correct answer is (b) It measures internal resistance

The explanation is: Potentiometer is an electric instrument used to measure internal resistance, electromotive force (emf), and it is also used for comparing the emfs of different cells. Potentiometer can be used as a variable resistor as well.

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