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What is the difference between resistance …

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What is the difference between resistance and resistivity??
  • 1 answers

Yogita Ingle 5 years, 8 months 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.
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