Mercury thermometers can be used to measure temperatures upto
A spirometer can be used to measure directly
Instead of voltmeter, potentiometer is always used to measure e.m.f. of cell, because at the null point, the potentiometer
In an ammeter calibration experiment, the potentiometer is used to measure in the secondary circuit, the
A deflection magnetometer can be used for measuring –
Potentiometer is used to
Assertion : Potentiometer is used only to compare potential differences. Reason: The potentiometer draws current from the voltage source being measured .
