Question

Need explaination plzzzzzzzzzzzz

Answer 1

Answer:

We know that,

$I=neAv$

also I = VR, I is current, V is potential and R is resistance.

R = I/V  -------> (1)

also,

$V =El$  where, E is electric field and l is the length.

from (1),

$R = \frac{neAv}{El}$ ---------> (2)

also, $v = \frac{eEt}{m}$ ---------> (3)

here, t or ζ (tau) is relaxation time, and m is the mass.

substituting (3) in (2),

$R = \frac{ne^{2}At }{ml}$

This is the answer.

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