First slide

electric current

Question

If E denotes electric field in a uniform conductor, i corresponding current through it and v7 drift velocity of electrons, then which of the following graphs is correct

Moderate

A
B
C
D

Solution

$E = \frac{iR}{L} = \frac{iρ}{A} = \frac{{neAv}_{d} ρ}{A}$
or $E = {nev}_{d} ρ or v_{d} \propto E$
The graph between E and v_d will be a straight line

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