Answer to Question #294683 in Electrical Engineering for Wisdom

Question

Two circular loops A and B have their planes parallel to each other.

Loop A has a current moving in the counter clockwise direction, viewed from above.

1. If the current in loop A decreases with time, what is the direction of the induced current in loop B? Will the two loops attract or repel each other?

2. If the current in loop A increases with time, What is the direction of the induced current in loop B? Will the two loops attract or repel each other?

Answer 1

1. If the current in loop A decreases with time, the direction of the induced current in loop B is counter-clockwise and the loops are attracting.

2. If the current in loop A increases with time, the direction of the induced current in loop B clockwise and the loops repel.