JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 15 April 2023, Shift 1, Physics Q36

Question 36 of 90 in this shift, Physics question 6 of 30, Section A.

Two identical particles each of mass 'm' go round a circle of radius

a

under the action of their mutual gravitational attraction. The angular speed of each particle will be :

(1) $\sqrt{\frac{Gm}{2a^3}}$
(2) $\sqrt{\frac{Gm}{4a^3}}$ Official answer
(3) $\sqrt{\frac{Gm}{8a^3}}$
(4) $\sqrt{\frac{Gm}{a^3}}$

Official answer

Option 2

NTA final key.

Chapter: Gravitation
Topic: Orbital Mechanics
Idea tested: Binary Star Systems

Same idea in other shifts

Asked 3× in all

3 Aug 2021, Shift 2 · Q26Two particles of equal mass 'm' go round a circle of radius $R$ under the action of their mutual gravitational attraction. The speed of…MediumNumerical value
24 Feb 2021, Shift 1 · Q2Two stars of masses m and 2m at a distance d rotate about their common centre of mass in free space. The period of revolution is :MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.