How does the resistivity of a conductor vary with temperature?
OR
what is the relation b/w resistivity and temperature?
OR
why are alloys with high resistivity used for electrical heating devices?
Answers
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3
on increasing the temperature the vibration of the molecule increases so the resistivity increases .
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1
Answer:
1) the resistivity of a conductor vary with temperature as the temperature of the conductor increases the average speed of the electrons acting as the surface carriers increases.
2) alloy used in electrical heating device because the resistivity of an alloy is more than resistivity of a pure metal
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