Q. The effect due to uniform magnetic field on a freely suspended magnetic needle is as follows
A) Both torque and net force are present
B) Torque is present but no net force
C) Both torque and net force are absent
D) Net force is present but not torque
Explanation
(b) When a magnetic needle is placed in a uniform magnetic field, equal and opposite forces act on the poles of the needle which give rise to a torque, but not net force.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.