Calculate the radius of the circular ring having a moment of inertia 59 kgm^2 and mass of69 kg.(a) .924 m(b) .928 m(c) .934 m(d) .944 mI had been asked this question in a job interview.The doubt is from Modified Speed Torque Characteristics of DC Series Motors in division Characteristics of DC & AC Motors of Electric Drives

Calculate the radius of the circular ring having a moment of inertia 5

1.	Calculate the radius of the circular ring having a moment of inertia 59 kgm^2 and mass of69 kg.(a) .924 m(b) .928 m(c) .934 m(d) .944 mI had been asked this question in a job interview.The doubt is from Modified Speed Torque Characteristics of DC Series Motors in division Characteristics of DC & AC Motors of Electric Drives
Answer» Correct ANSWER is (a) .924 m Easiest explanation: The moment of inertia of the circular ring can be calculated using the FORMULA I=∑miri^2. The moment of inertia of a circular ring and MASS is given. R=((59)÷(69))^.5 = .924 m. It depends upon the orientation of the rotational axis.

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