A electromagnet consists of a coil and variable power supply. A conducting ring

Question

A electromagnet consists of a coil and variable power supply. A conducting ring is placed in two different orientations close to electromagnet. The voltage of power supply is suddenly decreased. What is true of the induced current in the ring and the net magnetic force on the ring while the voltage of the power supply is decreasing?

Top: Induced current -> in at top, out at bottom. Magnetic force -> to the right.

Bottom: induced current -> zero. Magnetic force ->zero

Top: Induced current -> out at top, in at bottom. Magnetic force -> to the right.

Bottom: induced current -> zero. Magnetic force ->zero

Top: induced current -> zero. Magnetic force ->zero

Bottom: Induced current -> out at top, in at bottom. Magnetic force -> to the left.

Top: induced current -> zero. Magnetic force ->zero

Bottom: Induced current -> out at top, in at bottom. Magnetic force -> to the right.

Top: induced current -> zero. Magnetic force ->zero

Bottom: Induced current -> in at top, out at bottom. Magnetic force -> to the right.

Top: induced current -> zero. Magnetic force ->zero

Bottom: Induced current -> in at top, out at bottom. Magnetic force -> to the left.

Top: Induced current -> out at top, in at bottom. Magnetic force -> to the left.

Bottom: induced current -> zero. Magnetic force ->zero

Top: Induced current -> in at top, out at bottom. Magnetic force -> to the left.

Bottom: induced current -> zero. Magnetic force ->zero

Top: Induced current -> in at top, out at bottom. Magnetic force -> to the right.

Bottom: induced current -> zero. Magnetic force ->zero

Explanation / Answer

Top: induced current -> zero. Magnetic force ->zero

Bottom: Induced current -> out at top, in at bottom. Magnetic force -> to the left.

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