Question

write relation between current and drift velocity of electron in a conductor used this relation to explain how the resistance of a conductor changes with the rise in temperature​

Answer 1

I =neAv is the relation

as resistivity is given by

rho=m/ne^2 t

so when temperature increases collision frequency of electrons also increases so relaxation time t decreases which results in increased resistivity hence resistance also increases

Answer 2

Explanation:

The relation between current and drift velocity of electron in a conductor is given by :

$I=neAv_d$

Here, n is number of electrons

e is electronic charge

A is area of cross section

$v_d$ drift velocity

• On increasing the temperature, the collision between electrons increase and drift velocity increases. Due to increase in collision between the electrons, the resistance of the conductor increases.
• Hence, with the increase in temperature, resistance of a conductor increase.

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Resistance

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