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Q.

A constant power is supplied to a rotating disc. The relationship of angular velocity (ω)  of disc and number of rotations (n) made by the disc is governed by

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a

w∝n1/3

b

w∝n2

c

w∝n2/3

d

w∝n3/2

answer is A.

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Detailed Solution

P=τω

P=Iαω

α=ωt

α=ω22πn

P=I×ω22πn×ω

=ω2αn

ωαn1/3

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