State uses of potentiometer.
Answers
Answer:
To compare the emfs of two primary cells
To determine the internal resistance of a primary cell
To determine the value of a high resistance
To determine the emf of a cell.
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(1).A potentiometer is a three-terminal resistor that has a sliding or revolving contact to create a voltage divider that can be adjusted. (2).It functions as a variable resistor or rheostat if only one terminal—the other end—and the wiper are employed.
(3).The component, which goes by the name potentiometer, is essentially an implementation of the same idea as the measuring device known as a voltage divider used to measure electric potential (voltage).
(4).The volume controls on music equipment and other electrical devices are frequently controlled by potentiometers. (5).Potentiometers that are controlled by a mechanism can serve as position transducers in various devices, such as joysticks. (6).Since the power lost in the potentiometer would be similar to the power in the device being controlled, potentiometers are rarely used to regulate substantial power .