Question

A loop of wire lies flat on a horizontal surface. A bar magnet is held above the center of a loop with south pole pointing down. Magnet is released.

As magnet approaches the loop of wire, the induced current in this wire is:

a) Clockwise
b) Counterclockwise
c) Zero

Answer 1

b) clockwise

Step-by-step explanation:

The right hand rule states that to determine the direction of the magnetic force on a positive moving charge, point the thumb of the right hand in the direction of the potential v, the fingers in the direction of the magnetic field, B, and a perpendicular to the palm points in the direction of the force, F.

Since the south pole of the bar magnet is pointing downwards, the induced current developed in the wire repels it and moves in the clockwise direction.

Answer 2

A

Step-by-step explanation:

Current, magnetic field and motion are mutually dependent and perpendicular to one another