a potential difference of V volt is applied across a copper wire of length l and diameter d how - Physics - Current Electricity

Question

a potential difference of V volt is applied across a copper wire
of length l and diameter d how much will the drift velocity be
affected if (1) V is doubled ( 2) i is doubled

Shikha Bhadoria · Accepted Answer

We know that,

$I = n A v_{d} e v_{d} = \frac{I}{n A e}$

So the drift velocity only depends upon the current flowing through it, charge carrier density, cross sectional area and the electronic charge.

$v_{d} \propto I O h m' s L a w : V \propto I T h u s, v_{d} \propto V$

Thus, if voltage is doubled, the drift velocity doubles.

Also when current is doubled, the drift velocity doubles.

a potential difference of V volt is applied across a copper wire of length l and diameter d. how much will the drift velocity be affected if (1) V is doubled ( 2) i is doubled.