JEE Physics · Hard

Magnetism: Net Force on Closed Loop in Uniform Field MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Net Force on Closed Loop in Uniform FieldHardQuestion 20243

Question

Net force on a closed current loop placed in a uniform magnetic field is:
  1. A
    NIAB
  2. B
    Zero
    Correct
  3. C
    NIAB sinθ
  4. D
    Depends on orientation

Correct answer

Zero

Explanation

In a uniform field, the forces on each element of the loop are equal and opposite for opposite sides → net force = 0. Only torque acts on the loop in a uniform field, not net translational force.