OnlineCBT Logo OnlineCBT
⚲
हिन्दी
OnlineCBT Logo OnlineCBT
⚲

Physics · PYQ NEET UG 2026

हिन्दी

Solar system, the time-period of revolution of a planet tracing a circular orbit of radius R is proportional to :

  1. A
    \( R^{1/2} \)
  2. B
    \( R^{3/2} \)
  3. C
    \( R^{2} \)
  4. D
    \( R^{3} \)
View Answer & Solution

Correct answer · Option B

\( R^{3/2} \)

Explanation

According to Kepler's third law, \( T^2 \propto R^3 \), therefore \( T \propto R^{3/2} \).

Related questions

A ray of light with wavelength \( \lambda \) is incident on three different photoelectric cells namely 1, 2 and 3. The threshold wavelength of these photoelectric cells are \( \lambda_1 \), \( \lambda_2 \), and \( \lambda_3 \), respectively and the magnitude of stopping potentials of these cells are \( V_1 \), \( V_2 \) and \( V_3 \), respectively. The relation between \( \lambda \) and threshold wavelengths are \( \lambda_1 < \lambda \), \( \lambda_2 > \lambda \) and \( \lambda_3 \gg \lambda \). The correct option is :→An ac voltage $V = 220 \sin(2 \times 10^3 t)$ Volt is applied to a series LCR circuit. Then the current amplitude in this circuit is : (Given : $L = 10$ mH, $C = 25$ $\mu$F, $R = 100$ $\Omega$)→The mean free path of molecules in an ideal gas A is half that of another ideal gas B. The diameter of the spherical molecules of gas A is twice the diameter of the molecules of B. If number densities of the gases A and B are \( n_A \) and \( \nu_B \), respectively, then the correct option is :→Water flows in a streamline motion through a horizontal pipe of circular cross-section as shown in the figure. The pressure difference of water between \( P \) and \( Q \) is \( 15 \text{ Nm}^{-2} \). The area of cross-section at \( P \) and \( Q \) are \( 40 \text{ cm}^2 \) and \( 20 \text{ cm}^2 \), respectively. The rate of flow of water through the pipe, in \( ext{cm}^3\text{s}^{-1} \), is : [Take density of water \( = 1000 \text{ kg m}^{-3} \)]→
OnlineCBT

Our mission is "To educate students and help them excel in competitive exam preparation to the best of their potential. To impart good values in students and develop their overall exam readiness."

Useful Link
Important Pages
Courses & Practice
Contact
Address

Plot No 10, Dholigumti, Panditpura Road, Bandikui, Dausa(Raj) 303313

Contact

+91 7877547686

 E-mail

onlinecbtportal@gmail.com

 Helpline Number

+91 7877547686
Share
Click To Download
Get it on Google Play

ऐप डाउनलोड करने
के लिए Google Play पर
उपलब्ध है

Terms of Use | Privacy Policy | Cookie Policy | Disclaimer | Editorial Policy | Fact Check | Corrections | DMCA | Ad Choices

Copyright © 2026 - OnlineCBT.in. All Rights Reserved.

WhatsApp Chat