A uniform metallic rod rotates about its perpendicular bisector with constant angular speed. If it is heated uniformly to raise its temperature slightly,
Text Solution
Verified by ExpertsThe correct answer is:
B
As the rod is heated, it expands. No external torque is acting on the system, so angular momentum should be conserved.
Angular momentum, 
constant 
Due to expansion of the rod, 
So, angular velocity (speed of rotation) decreases.
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