In this next drawing, the South Pole of a magnet is facing down (it is closest t

Question

In this next drawing, the South Pole of a magnet is facing down (it is closest to the loop). The magnet is then dropped through the coil. Draw the direction of the magnetic field due to the bar magnet within the area of the wire loop while the magnet is above the loop and falling down toward the wire loop.

a) Is there any flux within the wire loop? Yes No

b) Is the flux within the loop increasing, decreasing, or staying the same? ________

c) What is the initial direction of the induced current in the wire? CW CCW

d) Explain your choice for c) above.

Explanation / Answer

a) yes

b) increasing

c) CCW

d) When fux increases (out of the loop), emf is induced and induced current flows in the loop.

this induced current opposses the change in magnetic flux. so it should be ccw

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