One metallic plate, oscillates perpendicular to magnetic field between two flat unlike magnetic poles,____

Options

A. there is no effect on oscillations of plate.
B. eddy currents are produced in the plate which makes oscillations faster.
C. eddy currents are produced in the plate which makes oscillations of plate slower.
D. plane of oscillations of plate changes.

Answer

C

Explanation

Because of continuous cutting of magnetic flux, energy of plate dissipates in the form of heat during the flow of eddy currents and so amplitude of oscillations goes on decreasing because of continuous decreasing energy of oscillations.