A metal sheet is placed in front of a strong magnetic pole. A force is needed to

A metal sheet is placed in front of the strong magnetic pole. This pole has q strong magnetic field. A strong magnetic pole will attract the magnet if the metal is magnetic then a force is needed to hold the metal sheet. If the metal is magnetic or not if we want to move the metal sheet away from that strong magnetic pole we need some force do it. Because of the movement, eddy currents will be induced in the sheet. These eddy currents produce thermal energy. Thermal energy comes at the cost of kinetic energy. Thus, the plates slow down. So we need a force to hold the sheet if the metal is magnetic. And also the sheet needs a force to move away from that strong magnetic filed even it is nonmagnetic.

So option A, C and D are correct.

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