According to Lenz\'s law, when a bar magnet is thrust into a coil, what is alway

Question

According to Lenz's law, when a bar magnet is thrust into a coil, what is always the direction of the coil's induced field? the direction that opposes the magnet's field the direction that opposes the magnet's motion the direction opposite the current the direction that opposes the change in flux A metal disc is moved to your right through a magnetic field that is directed away from you. As the disc begins to enter the field, what effect will you notice on the motion of the disc? Its speed will increase. Its speed will decrease. It will begin to move toward you. It will begin to move away from you.

Explanation / Answer

1.The direction of the induced field in the coil opposes the change in flux, but the change in flux depends on which pole of the magnet is thrust into the coil.

The direction that opposes the change in flux

2.Motional emf causes a current loop in the conductor. While only part of the loop is in the field, the unbalanced force opposes the motion of the disc. So, it's speed will decrease.

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