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Q.

For which of the following dependences of drift velocity v_d on electric field E, is Ohm's law obeyed?

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a

v_d ∝ E

b

v_d ∝ E²

c

v_d ∝ $\sqrt{E}$

d

v_d = constant

answer is A.

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Detailed Solution

I=nev_d

$\frac{V}{R} = n e v_{d} \frac{E l}{R} = n e v_{d}$

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