Question

Assertion: A boiled egg can be easily distinguished from a raw unboiled egg by spinning.
Reason: The hard boiled egg has a moment of inertia which is more than that of the raw egg.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but 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.

Answer 1

Correct Answer - c
A hard boiled egg behaves as a rigid body whereas the raw egg has liquid in it which also moves. On spinning both eggs with the same external torque, the hard boiled egg spins faster and the rotation of the raw egg is slower. This is due to the liquid in the raw egg which tends to move away from the axis of rotation thereby decreasing the effectiveness of the external torque.