Asseration: A metal piece and a non-metal (stone) piece are dropped from the same height near earth's surface. Both will reach the earth's surface simultaneousely.
Reason: There is no effect of earth's magnetic field on freely falling body.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.

Answer

D

Explanation

When a metal piece falls from a certain height then eddy currents are produced in it due to earth.s magnetic field. Eddy currents oppose the motion of piece. Hence metal piece falls with a smaller acceleration (as compared to g). But no eddy currents are produced in non-metal piece. Hence it drops with acceleration due to gravity.
Therefore, non-metal piece will reach the earth.s surface earlier.