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Question 31609
JEE Physics · Medium

Current Electricity: Drift Velocity MCQ

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Drift VelocityMediumQuestion 31609

Question

Drift velocity of free electrons in a conductor is related to current I, number density n, and cross-section A by:
  1. A
    I = nAev_d
    Correct
  2. B
    I = nev_d/A
  3. C
    I = Aev_d/n
  4. D
    I = nAe/v_d

Correct answer

I = nAev_d

Explanation

Each electron carries charge e; n electrons per unit volume drift at v_d. Current I = nAev_d.

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