H2P-443
Lenz’s law
H2 Physics · JC 2 · Medium · Lenz’s law
A metal ring swings like a pendulum between the poles of a magnet. As it moves, it cuts magnetic flux and an e.m.f. is induced, causing eddy currents. Using Lenz’s law, state and explain how these currents affect the motion of the ring.
- They oppose the motion, so the ring loses energy and stops sooner.
- They aid the motion, so the ring swings with larger amplitude.
- They have no effect because the ring is neutral overall.
- They only change the period but not the energy of oscillation.
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