Question

on increasing the temperature resistivity_____?​

Answer 1

Answer:

decrease

Explanation:

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Answer 2

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Increase

If the temperature increases, the amplitude of the vibrations of the +ve ions in the conductor also increases. Due to this, the free electrons collide more frequently with the vibrating ions and as a result, the average relaxation time decreases. Since ρ ∝1/τ, the resistivity of a metallic conductor increases with increase in temperature.