| Assertion: 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 simultaneously. |
| Reason: There is no effect of earth's magnetic field on freely falling body. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) if assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: D
Solution :
When a metal piece falls from a certain height then eddy currents are produced in it due to earth's magnetic field. According to Lenz's law, eddy current oppose the motion of piece. Hence, metal piece falls with a smaller are produced in non metal piece, hence it drops with acceleration due to gravity i.e. Non-metal piece will reach the earth's surface earlier.
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