Lenz's Law Video Lessons

Concept

# Problem: 1. The conducting loop in the figure is moving into the region between the magnetic poles shown.Is the induced current (viewed from above) clockwise or counterclockwise?A. clockwiseB. counterclockwise2. Is there an attractive magnetic force that tends to pull the loop in, like a magnet pulls on a paper clip? Or do you need to push the loop in against a repulsive force?A.You need to push the loop in against a repulsive force.B.There is an attractive magnetic force that tends to pull the loop in.

###### FREE Expert Solution

In this problem, we're going to use the right-hand thumb rule to get the direction of the force.

Using the right hand, the fingers will curl from the direction of velocity to the direction of the magnetic field and then the thumb will point in the direction of the force exerted on the magnetic field.

According to Lenz's law, the induced emf in a conducting material, by a changing magnetic flux, will create a magnetic field that is exactly opposite to the change in the applied magnetic flux.

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###### Problem Details

1. The conducting loop in the figure is moving into the region between the magnetic poles shown.
Is the induced current (viewed from above) clockwise or counterclockwise?
A. clockwise
B. counterclockwise

2. Is there an attractive magnetic force that tends to pull the loop in, like a magnet pulls on a paper clip? Or do you need to push the loop in against a repulsive force?
A.You need to push the loop in against a repulsive force.
B.There is an attractive magnetic force that tends to pull the loop in.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Lenz's Law concept. You can view video lessons to learn Lenz's Law. Or if you need more Lenz's Law practice, you can also practice Lenz's Law practice problems.