creasing radius. Indicate the direction of the current in one ring (a) as the metal swings down from the left into the magnet- ic field and (b) as the metal swings up to- ward the right out of the magnetic field. Use Lenz's law to justify your answers.

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Chapter1: Units, Trigonometry. And Vectors
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13. You have the apparatus shown in Figure
P21.13. A circular metal plate swings past
the north pole of a permanent magnet. The
metal consists of a series of rings of in-
creasing radius. Indicate the direction of
the current in one ring (a) as the metal
swings down from the left into the magnet-
ic field and (b) as the metal swings up to-
ward the right out of the magnetic field.
Use Lenz's law to justify your answers.
Figure P21.13
Metal plate
Magnet
N
Transcribed Image Text:13. You have the apparatus shown in Figure P21.13. A circular metal plate swings past the north pole of a permanent magnet. The metal consists of a series of rings of in- creasing radius. Indicate the direction of the current in one ring (a) as the metal swings down from the left into the magnet- ic field and (b) as the metal swings up to- ward the right out of the magnetic field. Use Lenz's law to justify your answers. Figure P21.13 Metal plate Magnet N
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