Question

A uniformly charged ring of charge $+Q$ is placed close to a long current carrying wire. The ring is rotating with an angular velocity $\omega$. Wire and ring are in same plane. Choose the incorrrect statement

• A. Net force on loop is not zero
• B. Net torque on loop is zero
• C. Loop moves towards wire
• D. Magnetic moment of loop remains constant

Answer 1

The correct option is C Loop moves towards wire

By applying Fleming's left hand rule keeping in consideration that all points on the loop are at different distance from the wire, it is observed that the loop will move away from the wire.