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  4. When a potential difference V is applied across a conductor at a temperature T, the drift velocity of electrons is proportional to

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Q. When a potential difference $V$ is applied across a conductor at a temperature $T$, the drift velocity of electrons is proportional to

BITSATBITSAT 2019

Solution:

We know that Drift velocity
$v _{ d }=\frac{ eE }{ m } \tau=\frac{ e }{ m } \tau\left(\frac{ V }{1}\right)$
$\left(\because E =\frac{ V }{1}\right)$
so for a particular conductor of a particular length the drift velocity will directly depend upon voltage
Hence $v_{d} \propto V$.