A copper loop hangs from two strings, as shown in (Figure 1).

Part B

In which direction (toward or away from the magnet) does the loop swing if the magnet is moving toward the loop?

toward the magnet
away from the magnet Figure
The loop doesn't move

Part C

In which direction (toward or away from the magnet) does the loop swing if the magnet is moving away from the loop?

toward the magnet
away from the magnet
The loop doesn't move

Solutions

Expert Solution

Part B)

As the magnet's north pole is moved towards the loop, the magnetic flux linked with the coil increases. To oppose the increase in magnetic flux, the loop induces a current in it to have north polarity. We know that as poles repel. Hence the loop swings away from the magnet.

Away from the magnet

Part C)

As the magnet's north pole is moved away from the loop, the magnetic flux linked with the coil decreases. To oppose the decrease in magnetic flux, the loop induces a current in it to have south polarity. We know that unlike poles attract. Hence the loop swings towards the magnet.

Towards the magnet

Dr. OWL answered 3 years ago

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