Question

potentiometer is mainly used to measure ​

Answer 1

Answer:

The potentiometer is a simple device used to measure the electrical potentials (or compare the e.m.f of a cell). One form of potentiometer is a uniform high-resistance wire attached to an insulating support, marked with a linear measuring scale.

Answer 2

Answer :

★ Uses of potentiometer :

• Any physical quantity that can produce or control a potential difference can be measured using a potentiometer. Thus, a potentiometer can be used to measure and control stress, temperature, radiation, pH, frequency etc$.$

Additional Information :

• The potentiometer can be regarded as an ideal voltmeter with infinite resistance because it does not draw any current from the source of emf at the null point.

The working of potentiometer requires that

1. The potentiometer wire should be of uniform cross-section.
2. The current through the wire should remain constant.

The positive terminals of the auxillary battery and the cell whose emf is to be determined must be connected to the zero end of the potentiometer.