| ⇦ | 
| ⇨ |
Two discs of same material and thickness have radii 0.2 m and 0.6 m. Their moments of inertia about their axes will be in the ratio
Options
(a) 1 : 81
(b) 1 : 27
(c) 1 : 9
(d) 1 : 3
Correct Answer:
1 : 81
Explanation:
I = (1/2) MR² = (1/2) (πR²t ρ) R² = πtρR⁴ / 2
t and p are same
I₁/I₂ = [R₁/R₂]⁴ = [0.2 / 0.6]⁴ = 1 / 81.
Related Questions: - A car of mass m starts from rest and accelerates so that the instantaneous
- Two cars A and B moving with same speed of 45 km/hr along same direction.
- The thermo e.m.f. E in volts of a certain thermocouple is found to vary
- If a magnetic substance is brought near the north or the south pole of a bar magnet
- The product of pressure and volume hve thesame units as the product of
Topics: Motion of system of Particles and Rigid Body
(73)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A car of mass m starts from rest and accelerates so that the instantaneous
- Two cars A and B moving with same speed of 45 km/hr along same direction.
- The thermo e.m.f. E in volts of a certain thermocouple is found to vary
- If a magnetic substance is brought near the north or the south pole of a bar magnet
- The product of pressure and volume hve thesame units as the product of
Topics: Motion of system of Particles and Rigid Body (73)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
I want to gain more knowledge about this