What is Potentiometer: Definition and 105 Discussions
A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.
The measuring instrument called a potentiometer 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.
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1) The slide-wire of a simple potentiometer is 2 meters long and has a resistance of 5 ohms. The emf of the working battery is 6 V and its internal resistance is 0.20 W. What resistance must be added to the working-battery...
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explain the reasons for the following procedures in potentiometer experiment:
(a)the positive pole of a battery whose emf is required is connected to the same terminal of the potentiometer wire as the positive pole of the driver cell.
(b)The protective...
I have a homework question about a potentiometer. There is a resistor between a and b that is a uniform wire of length l, with a sliding contact c at a distance x from b. An unknown potential difference V is measured by sliding the contact until the galvonometer G reads zero. I need to show...
I have spend many hours trying to solve this question but still can't figure out the answer.I hope that somebody will help me with this question.Thanks for anybody that spend some time on this question.
I have my question and solution in the attachment followed.
Hello I have an Electronic control unit supplying +5volts and 15mA to a Potentiometer. The control unit needs to have padding resistors that need to be sized correctly so the output of the potentiometer is 0.5 volts to 4.5 volts. Can anyone help me figure out how to size the potentiometer and...