Question

How does the mobility of electrons in a conductor change, if the potential difference applied across the conductor is doubled, keeping the length and temperature of the conductor constant?​

Answer 1

Answer:

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your answer is here !

Explanation:

The mobility of electrons in a conductor is given by the expression, μ=eτm

As it's independent of the applied potential difference, so it will not change if the applied potential difference will be doubled.

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Answer 2

Answer:

$\huge \: answer$

If the drift velocity of the electrons is

$v_{d}$

. Then, the mobility is

$u = \frac{v _{d}}{e}$

where

$e$

is the electric field strength.

Also, if the electron density is

$n$

,area of cross section is A, then

$i = neav _{d}$

Also,

$v = ir$

Combining all, we get

$u = \frac{v}{neare}$

Now,

$e = \frac{v}{d}$

where

$e$

is the length of conductor.

Thus,

$u = \frac{d}{near}$

Hence, mobility is independent of the voltage applied. Thus it remains same.