Medium MCQ +4 / -1 PYQ · JEE Mains 2021

A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on the wire.

  1. A Loop assumes circular shape with its plane normal to the field. Correct answer
  2. B Loop assumes circular shape with its plane parallel to the field.
  3. C Wire gets stretched to become straight.
  4. D Shape of the loop remains unchanged.

Solution

Force on each wire be along radially outward and equal so, it will take the shape of circle and parallel to the field.

About this question

Subject: Physics · Chapter: Magnetic Effects of Current · Topic: Biot-Savart Law

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