First slide

Drift velocity

Question

A potential difference V is applied to a copper wire of length l and thickness d. If V is doubled, the drift velocity.

Easy

A

is doubled
B

is halved
C

remain same
D

becomes zero

Solution

$\begin{array}{l} i = n e A v_{d} \\ \frac{V}{R} = n e A v_{d} \\ V ↑ 2, V_{d} ↑ 2 \end{array}$

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