A thick metallic plate oscillates between the poles of a strong electromagnet. When the field is switched on, the oscillations die out rapidly. Which statements are correct?

Select all that apply

• Option A

  Eddy currents are induced in the plate.

• Option B

  Magnetic forces associated with eddy currents oppose the motion.

• Option C

  Mechanical energy is converted mainly into heat.

• Option D

  Cutting narrow slots in the plate can reduce damping.