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JEE Main 2026 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 2 April 2026, Shift 1, Physics Q30

Question 30 of 75 in this shift, Physics question 5 of 25, Section A.

A 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 of mass

4M

in a orbit of radius

2R

. Ratio of time periods of revolution of

P_2

and

P_1

is __________.

(1) $\frac12$
(2) $2$ Official answer
(3) $4$
(4) $\frac14$

Official answer

Option 2

NTA final key.

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

Same idea in other shifts

Asked 2× in all

2 Sep 2020, Shift 1 · Q6The mass density of a spherical galaxy varies as $\frac{K}{r}$ over a large distance 'r' from its centre. In that region, a small star 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 42 of the 174 JEE Main shifts held from 2017 to 2026.