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What is the difference between resistor and rheostat?

Posted by Ojal Gupta 5 years ago

CBSE > Class 10 > Science

2 answers

Srikar B 4 years, 11 months ago

RESISTOR 1. It is the property of a conductor to resist the flow of electric current 2.R=V/I 3.It is denoted with ohm RHEOSTAT 1. A component used to change the current with out changing the source of voltage is rheostat 2.It is a device change the resistance of a conductor

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Yogita Ingle 5 years ago

Sl. No.	Differentiating Property	Resistance	Resistivity
1	Definition	Resistance is the physical property of a substance because of which it opposes the flow of current i.e. electrons.	Resistivity is the physical property of a particular substance which is having particular dimensions.
2	Proportionality	Resistance is directly proportional to the length and temperature while it is inversely proportional to the cross-sectional area of the material.	Resistivity is only proportional to the nature and temperature of the particular material.
3	Symbol	R	ρ
4	Formula	R = V/I or, R = ρ(L/A)V = Voltage, I = Current, ρ = Resistivity	ρ = (R×A)/L R = Resistance, L= Length, A = Cross-sectional area
5	SI Units	The SI unit of resistance is Ohms	The SI unit of resistivity is Ohms-meter.
6	Applications	The property of resistance is used in several places like heaters, fuses, sensors, etc.	Electrical resistivity measurement is used as a quality control test for calcareous soil.

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Posted by Pandey Ji 6 months, 1 week ago

CBSE > Class 10 > Science