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Question 20171
JEE Physics · Medium

Magnetism: Parallel Wires — Attraction MCQ

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

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Parallel Wires — AttractionMediumQuestion 20171

Question

Two long parallel wires carrying currents in the same direction:
  1. A
    Repel each other
  2. B
    Attract each other
    Correct
  3. C
    Have no force between them
  4. D
    Exert only torque

Correct answer

Attract each other

Explanation

The field of wire 1 at wire 2 interacts with wire 2's current (F = IL × B); using the right-hand rule both forces point toward each other → attraction.

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