An infinitely long, straight conductor AB is fixed and a current is passed through it…

Physics · JEE Advanced · NTA Exams — Magnetic Effects of Current and Magnetism

An infinitely long, straight conductor AB is fixed and a current is passed through it. Another movable straight wire CD of finite length and carrying current is held perpendicular to it and released. Neglect weight of the wire

1. The rod CD will move upward parallel to itself
2. The rod CD will move downward parallel to itself
3. The rod CD will move upward and turn clockwise at the same time
4. The rod CD will move upward and turn anti-clockwise at the same time

Answer

(C) The rod CD will move upward and turn clockwise at the same time

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