NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Rotational Motion
NEET · Physics · Rotational Motion
Assertion (A) : When a uniform metallic rod rotating about...
Assertion (A) : When a uniform metallic rod rotating about perpendicular bisector with constant angular speed is heated uniformly to raise its temperature slightly, its speed of rotation increases.
Reason (R) : When a metal rod is heated uniformly to raise its temperature slightly its moment of inertia increases.
Options
- A(A) and (R) are true and R is correct explanation of A.
- B(A) and (R) are true but (R) is not correct explanation of
- C(A) is true, but (R) is false
- D(A) is false but is true
Correct answer
D. (A) is false but is true
Step-by-step solution
When rod is heated uniformly, its moment inertia increases As L = constant, so angular speed should decrease.