We can explain this using Lenz's law.
Loop 1 has a decreasing flux out of the page and so will induce a counterclockwise current to try and make up for that.
Loops 4 and 5 have increasing emf out of the page.
Five loops are formed of copper wire of the same gauge (cross-sectional area). Loops 1-4 are identical; Loop 5 has the same height as others but is longer. At the instant shown, all the loops are moving at the same speed in the directions indicated.
There is a uniform magnetic field pointing out of the page in region I; in Region II there is no magnetic field. Ignore any interactions between the loops.
A) For any loop that has an induced current, indicate the direction of the current.
B) Rank the magnitude of the emfs around the loops. Explain your reasoning.
C) Rank the magnitudes of the currents in the loops. Explain your reasoning.
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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.
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Based on our data, we think this problem is relevant for Professor Soellner's class at UMICH.