A potentiometer measuring instrument is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name.

Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. Potentiometers operated by a mechanism can be used as position transducers, for example, in a joystick. Potentiometers are rarely used to directly control significant power (more than a watt), since the power dissipated in the potentiometer would be comparable to the power in the controlled load.

Comparison of e.m.f. of two cells by Potentiometer

Comparison of e.m.f. of two cells by Potentiometer

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Comparison of e.m.f. of two cells by Potentiometer

Comparison of e.m.f. of two cells by Potentiometer

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Comparison of e.m.f. of two cells by Potentiometer 

Comparison of e.m.f. of two cells by Potentiometer 

Comparison of e.m.f. of two cells by Potentiometer 

Comparison of e.m.f. of two cells by Potentiometer

Comparison of e.m.f. of two cells by Potentiometer

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Shah Jamal2nd Paper PracticalPracticalPhysics 2nd Paper Practical,Physics Practical,PracticalA potentiometer measuring instrument is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name. Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. Potentiometers operated by a mechanism can be used...Shah Jamal's Online Classroom