Science
Consider a system in which a metal ring is initially to the left of the field, homework help

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Hi! I hope I can help you get a better understanding of induced current.

For part A, the induced current must be in the direction opposite the change of the system. As the ring moves left to right, the number of magnetic field lines coming out of the screen increases. So the induced current tries to oppose this by creating field lines into the screen. The induced current must produce a field within the ring that is in the same direction as the decreasing magnetic field. According the right hand rule, this requires an induced current clockwise. 

For part C, the magnetic force is perpendicular to the magnetic field lines. Because the ring is moving towards the right, we know that the magnetic force must be to the right as well. 

Please let me know if you need any clarification. I'm always happy to answer your questions.

Carnegie Mellon University

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