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Question 20213
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Magnetism: Force on Moving Charge — JEE MCQ

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Force on Moving Charge — JEEMediumQuestion 20213

Question

A particle of mass m and charge q enters a uniform magnetic field B perpendicularly. The time taken to complete a semicircle is:
  1. A
    πm/qB
    Correct
  2. B
    2πm/qB
  3. C
    πm/2qB
  4. D
    πqB/m

Correct answer

πm/qB

Explanation

Time for full circle T = 2πm/(qB). Half circle time = T/2 = πm/(qB).

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