Match List-I with List-II
| List-I | List-II | ||
|---|---|---|---|
| (A) | Moment of inertia of solid sphere of radius R about any tangent. | (I) | |
| (B) | Moment of inertia of hollow sphere of radius (R) about any tangent. | (II) | |
| (C) | Moment of inertia of circular ring of radius (R) about its diameter. | (III) | |
| (D) | Moment of inertia of circular disc of radius (R) about any diameter. | (IV) |
Choose the correct answer from the options given below :
- AA - II, B - I, C - IV, D - III
- BA - I, B - II, C - IV, D - III
- CA - II, B - I, C - III, D - IV
- DA - I, B - II, C - III, D - IV
View written solutionFree
Correct answer: A
- Use standard moments of inertia and parallel axis theorem
We match each item in List-I.
- (A) Solid sphere of radius about any tangent
For a solid sphere, moment of inertia about any diameter is:
A tangent axis is parallel to a diameter and at distance from the center, so by parallel axis theorem:
So,
- (B) Hollow sphere of radius about any tangent
For a hollow sphere (spherical shell), moment of inertia about any diameter is:
Again using parallel axis theorem for tangent axis:
So,
- (C) Circular ring of radius about its diameter
For a ring, moment of inertia about axis perpendicular to its plane through center is:
By perpendicular axis theorem for a planar body:
Since for a ring, both diameters are equivalent,
Hence,
So,
- (D) Circular disc of radius about any diameter
For a disc, moment of inertia about axis perpendicular to plane through center is:
Using perpendicular axis theorem,
By symmetry,
So,
Thus,
- Final matching
This corresponds to Option A.
- Comparison with stored answer
Stored correct answer = A.
Our derived answer = A.
So the answer agrees with the stored answer.
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