JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 17 March 2021, Shift 2, Physics Q4

Question 4 of 90 in this shift, Physics question 4 of 30, Section A.

A geostationary satellite is orbiting around an arbitary planet 'P' at a height of 11R above the surface of 'P', R being the radius of 'P'. The time period of another satellite in hours at a height of 2R from the surface of 'P' is ________. 'P' has the time period of 24 hours.

(1) $5$
(2) $6\sqrt{2}$
(3) $3$ Official answer
(4) $\frac{6}{\sqrt{2}}$

Official answer

Option 3

NTA final key.

Chapter: Gravitation
Topic: Orbital Mechanics
Idea tested: Orbital Time Period

Same idea in other shifts

Asked 10× in all

2 Apr 2026, Shift 1 · Q30A planet ( $P_1$ ) is moving around the star of mass $2M$ in the orbit of radius $R$ . Another planet ( $P_2$ ) is moving around another star…EasySingle correct
4 Apr 2024, Shift 2 · Q37Correct formula for height of a satellite from earths surface is:MediumSingle correct
10 Apr 2023, Shift 2 · Q37The time period of a satellite, revolving above earth's surface at a height equal to R will be (Given $g = \pi^2$ m/s $^2$ , R = radius of…MediumSingle correct
29 Jun 2022, Shift 2 · Q40The time period of a satellite revolving around earth in a given orbit is 7 hours. If the radius of orbit is increased to three times its…EasySingle correct
3 Aug 2021, Shift 1 · Q28The time period of a satellite of earth is 10 hours. If the separation between the earth and the satellite is increased to 16 times the…EasyNumerical value
24 Feb 2021, Shift 1 · Q5Consider two satellites $S_1$ and $S_2$ with periods of revolution 1 hr. and 8 hr. respectively revolving around a planet in circular…EasySingle correct
25 Feb 2021, Shift 1 · Q6Two satellites A and B of masses 200 kg and 400 kg are revolving round the earth at height of 600 km and 1600 km respectively. If $T_A$ …MediumSingle correctHas a figure
18 Mar 2021, Shift 2 · Q5If the angular velocity of earth’s spin is increased such that the bodies at the equator start floating, the duration of the day would be…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.