Q. A magnetic needle suspended horizontally by an unspun silk fibre, oscillates in the horizontal plane because of the restoring force originating mainly from
A) The torsion of the silk fibre
B) The force of gravity
C) The horizontal component of earth’s magnetic field
D) All of the above factors
Explanation
(c)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.