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What is role of rheostat?

Updated: 8/10/2023
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11y ago

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A rheostat is a resistor with variable resistance.There are many type of rheostat,involved of a rotary-type rheostat and a sliding rheostst.I dunn know much about the rotary-type rheostat but I can tell u how does a sliding rheostat work.

A sliding rheostst consists of a coil resistance wire wound on a tube and a sliding contact.The sliding contact be moved on the metal bar.Consider of the length of the resistance wire which let electric current through increases,the reistance would be higher and decrease the elctric current.Thus by moving the sliding contact,we can adjust the size of electric current.It's ofter used as a dimmer or to adjustl the voluime of the radio.

If you are interested in the rotary-type rheostat,try to find it by yourself!

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14y ago
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14y ago

A sliding rheostatconsists of a sliding contact and a coil of resistance wire wound on a tube. Consider the length of the resistance wire through which he electric current flows. It chaanges when the sliding contact is moved along the metal bar. Therefore, the resistance of the rhestat is also changed.When the length of the resistance wire which the electric current flows through increases,the resistance of the rheostat will be higher and thus the electric current will decrease.

By the way, a rotary-type rheostat is also a resistor with variable resistance. Unfortunately, I dunn know much about it.You may try to find it out yourself<3

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14y ago

A rheostat is essentially a variable resistor. It is used in circuits to drop voltage or limit current.

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9y ago

A rheostat is a scientific instrument used as a resistor to help in regulation of currents by the means of variable resistances.

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15y ago

A Rheostat is a resistor which is designed to be adjustable versus a fixed resistor in which the value of the resistance cannot be changed.

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11y ago

it is a device which is used to change the resistance of circuit.

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10y ago

A rheostat is an electrical instrument. It is used to control a current by varying the resistance.

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9y ago

A variable resistor having only two terminals whose resistance value is changed by rotating a shaft or screw.

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How a rheostat is used is as a potential divider?

_____________ J| -_____/\/\/\/\_________+ | | | - + | |___i|i|___| E Well this is the circuit diagram , where r is the sliding jockey of the rheostat and a cell (E) is connected in parallel with the rheostat. By adjusting the jockey resistance of the rheostat can be altered which in turn would regulate the potential offered by the cell E to the main circuit. And thus a rheostat can be used as a potential divider.


How is a rheostat use as a potential divider?

_____________ J| -_____/\/\/\/\_________+ | | | - + | |___i|i|___| E Well this is the circuit diagram , where r is the sliding jockey of the rheostat and a cell (E) is connected in parallel with the rheostat. By adjusting the jockey resistance of the rheostat can be altered which in turn would regulate the potential offered by the cell E to the main circuit. And thus a rheostat can be used as a potential divider.


What is the symbol of rheostat?

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Who invented Rheostat?

Charles wheatstone