30 Imagine that there is a circular coil of copper wire lying flat on a horizont

Question

30 Imagine that there is a circular coil of copper wire lying flat on a horizontal table. A bar magnet is held with its south pole downward, vertically above the center of the coil. The magnet is released from rest and falls toward the coil. As viewed from above, you can say that, as it falls, the magnet induces (2 points) A. A counterclockwise current in the loop. B. A clockwise current in the loop. C. No current in the loop. D. An emf but no electric current in the loop. E. Not enough information is provided. 31. The wire shown carries a current I that is decreasing with time at a constant rate. The magnetic field (created by the current in the wire) in the region below the wire is oriented (2 points) A. into the page B. out of the page. C. up D. down. 32. The wire shown carries a current I that is decreasing with time at a constant rate. Select the correct statement (2 points) A. There is a clockwise induced current in the loop. B. There is a counterclockwise induced current in the loop. C. There is no induced current in the loop

Explanation / Answer

30. Option (B) use lenz law

31. Option (B) Again use lenz law

32. Option (B) Again use lenz law   

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