Question

A loop of wire lays flat on a horizontal surface in an area with uniform magnetic field directed vertically down. Magnetic field suddenly grows stronger. While magnetic field is changing, the induced current in the loop as viewed from above is:
A. clockwise
B. counterclockwise
C. zero
D. There is not enough information to answer this question

Answer 1

Answer:

B. counterclockwise

Explanation:

We shall apply Lenz's law to find direction of induced current . According to it , direction of induced current is such that the magnetic field produced  by it will try to nullify the change in  magnetic field that produces it. Increase in magnetic field in down ward direction is producing it so to nullify it , magnetic field induced will be in upward direction.  For it current induced will be anticlockwise.