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Calculate the moment of inertia of the disc having a mass of 1 kg and radius of 1 m.(a) 1 kgm^2(b) .5 kgm^2(c) 2 kgm^2(d) 3 kgm^2The question was posed to me in quiz.This intriguing question comes from Effect of Starting on Power Supply, Motor and Load in chapter Starting of Electric Drives |
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Answer» CORRECT OPTION is (b) .5 kgm^2 The explanation is: The moment of inertia of the disc can be calculated using the formula I=mr^2×.5. The mass of the disc and DIAMETER is given. I=(1)×.5×(1)^2=.5 kgm^2. It depends upon the orientation of the ROTATIONAL axis. |
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