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Difference between resistance and resitivity

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Difference between resistance and resitivity

Posted by Mahak Gupta 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Aatif Tufail 5 years, 1 month ago

1 Resistance- Resistance of conductor is a physical property of conductor which resists the flow of charge. Resistivity_ Resistivity of a substance is the physical property of substance whuch have particular dimensions 2 Resistance is donated by R. Resistivity is denoted as (rho). 3 S I unit of resistance of Ohms S I unit of Resistivity is ohms-metre

Yogita Ingle 5 years, 1 month ago

Resistance	Resistivity
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.
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.
R	ρ
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
The SI unit of resistance is Ohms.	The SI unit of resistivity is Ohms-meter.
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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