A magnet is bouncing up and down on a spring through a copper coil. Draw the cha

Question

A magnet is bouncing up and down on a spring through a copper coil. Draw the change of the flux (the B-field) in the coil and the resulting induced current and induced B-field for each of the following positions of the magnet. Label the direction of the current as cw (clock-wise), ccw (counter clock-wise), or zero.

a) The magnet is above the coil at rest.

b) The magnet is moving down and is above the ring.

c) The magnet is moving down and is in the center of the ring.

d) The magnet is moving down and is below the ring.

Explanation / Answer

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