A rectangular loop PQRS carrying a steady current is placed in a uniform magnetic…
PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
A rectangular loop PQRS carrying a steady current is placed in a uniform magnetic field such that sides PQ and RS are parallel to the field lines while sides QR and SP are perpendicular to the field. Which one of the following statements is correct?
(a) Every side experiences zero magnetic force because the current entering the loop equals the current leaving it.
(b) Unequal forces on QR and SP push the loop bodily in the direction of B without producing any rotation.
(c) The net magnetic force on the loop is zero but a torque acts that tends to rotate the loop.
(d) Non-zero forces on PQ and RS make the loop translate without rotation.