Q49 / 60 · NEST (NISER) 2016 · Physics

A fan of moment of inertia $I$ is set into rotation at time $t=0$ with constant power $P$. Then

A
the angular speed of the fan is proportional to $t$.
B
the angular acceleration of the fan remains constant.
C
the magnitude of the angular displacement is proportional to $t^2$.
Correct answer
D
the magnitude of the torque is proportional to $t^{-1 / 2}$.

Hence, the correct answer is option: 'D'.

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