KCET · Physics · Rotational Motion
The moment of inertia of a circular ring of radius \(\mathrm{r}\) and mass \(\mathrm{M}\) about diameter is
- A \(\frac{2}{5} \mathrm{Mr}^{2}\)
- B \(\frac{\mathrm{Mr}^{2}}{4}\)
- C \(\frac{\mathrm{Mr}^{2}}{2}\)
- D \(\frac{\mathrm{Mr}^{2}}{12}\)
Answer & Solution
Correct Answer
(C) \(\frac{\mathrm{Mr}^{2}}{2}\)
Step-by-step Solution
Detailed explanation
Moment of inertia of a circular ring about a diameter
\(\mathrm{I}=\frac{1}{2} \mathrm{Mr}^{2}\)
\(\mathrm{I}=\frac{1}{2} \mathrm{Mr}^{2}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A body of mass \( 50 \mathrm{~kg} \), is suspended using a spring balance inside a lift at rest. If the lift starts
falling freely, the reading of the spring balance isKCET 2017 Easy - A proton and a deuteron with the same initial kinetic energy enter a magnetic field in a direction perpendicular to the direction of the field. The ratio of the radii of the circular trajectories described by them isKCET 2007 Medium
- Kichhoff's junction rule is a reflection ofKCET 2019 Easy
- A truck accelerates from speed \(v\) to \(2 v\). Work done in during this isKCET 2013 Medium
- \(\mathrm{y}=3 \sin \pi\left(\frac{\mathrm{t}}{2}-\frac{\mathrm{x}}{4}\right)\) represents an equation of a progressive wave, where \(t\) is in second and \(x\) is in metre. The distance travelled by the wave in \(5 \mathrm{~s}\) isKCET 2009 Medium
- Two metal spheres of radii \(0.01 \mathrm{~m}\) and \(0.02 \mathrm{~m}\) are given a charge of \(15 \mathrm{mC}\) and \(45 \mathrm{mC}\) respectively. They are then connected by a wire. The final charge on the first sphere is \(\ldots \ldots \ldots . \times 10^{-3} \mathrm{C}\).KCET 2013 Medium
More PYQs from KCET
- If \( P(n): " 2^{2 n-1} \) is divisible by \( k \) for all \( n \varepsilon N^{\prime \prime} \) is true, then the value of ' \( k \) ' isKCET 2018 Medium
- In the given circuit, the resonant frequency is
KCET 2020 Medium - The value of \( \int_{2}^{8} \frac{\sqrt{10-x}}{\sqrt{x}+\sqrt{10-x}} d x \) isKCET 2016 Medium
- The inverse of 2010 in the group \(\mathrm{Q}^{+}\)of all positive rational under the binary operation * defined by \(\mathrm{a}\) * \(\mathrm{b}=\frac{\mathrm{ab}}{2010}, \forall \mathrm{a}, \mathrm{b} \in \mathrm{Q}^{+}\), isKCET 2010 Easy
- Identify the incorrect statement.KCET 2019 Hard
- A diabetic person carries a packet of glucose with him always, becauseKCET 2009 Hard