JEE Main 25 July 2021 Shift 1 Solved Paper

Section: Physics

Question : 2 of 90

Marks: +1, -0

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Moment of inertia of a circular disc of mass ' M ' and radius 'R' about X,Y axes (passing through its plane) and Z-axis which is perpendicular to its plane were found to be Ix,Iy and Iz respectively. The respective radii of gyration about all the three axes will be the same.
Reason R : A rigid body making rotational motion has fixed mass and shape. In the light of the above statements, choose the most appropriate answer from the options given below:

[25 Jul 2021 Shift 1]

Both A and R are correct but R is NOT the correct explanation of A.
A is not correct but R is correct.
A is correct but R is not correct.
Both A and R are correct and R is the correct explanation of A.

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