Q.
When a sheet of metal is placed in a magnetic field, which changes from zero to a maximum value, the induced currents are set up in the direction shown in figure. What is the direction of magnetic field.
A) Into the plane of the paper
B) Out of the plane f the paper
C) West to East
D) South to North
Explanation
(b) Induced current are clockwise. Therefore, induced magnetic field is into the plane of the paper. As it opposes the increasing inducing filed, the inducing field must be out of the plane of the paper.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.