Chapter 8.1, Problem 1bT

Suppose that the loop is now placed in the magnetic field of a solenoid as shown.

1. Determine whether there would be a current through the wire of the loop in each case below. if so, give the direction of the current. Explain in terms of magnetic forces exerted on the charges in the wire of the loop.

• The loop is stationary.
• The loop is moving toward the solenoid.
• The loop is moving away from the solenoid.

2. For each case above in which there is an induced current, determine:

• the direction of the magnetic moment of the loop. (Hint. Find the direction of the magnetic field at the center of the loop due to the induced current in the Loop. The magnetic moment is a vector that points in this same direction.)

• whether the loop is attracted toward or repelled from the solenoid.

•whether the force exerted on the loop tends to increase or to decrease the relative motion of the loop and solenoid.