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8. Define resistance and resistivity and also give the relation between them. Explain the dependence of resistance on temperature.

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Resistance is the opposition offered by a material to the flow of electric current. Resistivity, on the other hand, is the intrinsic property of a material that quantifies how strongly it resists the flow of electric current. The relationship between resistance (R), resistivity (ρ), and dimensions...
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Resistance is the opposition offered by a material to the flow of electric current. Resistivity, on the other hand, is the intrinsic property of a material that quantifies how strongly it resists the flow of electric current. The relationship between resistance (R), resistivity (ρ), and dimensions (length l, and cross-sectional area A) of the conductor is given by R=ρ⋅lA
Resistance is dependent on temperature, increasing with an increase in temperature for most conductors due to increased collision frequency of charge carriers with lattice ions, which impedes their flow.

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