Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Gravitation question

2021 · 20 Jul · Shift 2 · Q59
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Gravitation
  5. /2021 · 20 Jul · Shift 2 · Q59

Gravitation question

2021 · 20 Jul · Shift 2 · Q59

JEE MainPhysicsGravitationMCQ+4 / −1
Consider a binary star system of star A and star B with masses mA and mB revolving in a circular orbit of radii rA an rB, respectively. If TA and TB are the time period of star A and star B, respectively, Then :
  1. A
    TATB=(rArB)32{{{T_A}} \over {{T_B}}} = {\left( {{{{r_A}} \over {{r_B}}}} \right)^{{3 \over 2}}}TB​TA​​=(rB​rA​​)23​
  2. B
    TA=TB{T_A} = {T_B}TA​=TB​
  3. C
    TA>TB{T_A} \gt {T_B}TA​>TB​(if mA>mB{m_A} \gt {m_B}mA​>mB​)
  4. D
    TA>TB{T_A} \gt {T_B}TA​>TB​(if rA>rB{r_A} \gt {r_B}rA​>rB​)
PreviousNext

More from Gravitation

  • A body is projected vertically upwards from the surface of earth with a velocity sufficient enough to carry it to infinity. The time taken by it to reach height h is ​ s.2021 · MCQ
  • Four identical particles of equal masses 1 kg made to move along the circumference of a circle of radius 1 m under the action of their own mutual gravitational attraction. The speed of each particle will be :2021 · MCQ
  • Consider two satellites S1 and S2 with periods of revolution 1 hr. and 8 hr. respectively revolving around a planet in circular orbits. The ratio of angular velocity of satellite S1 to the angular velocity of satellite S2 is :2021 · MCQ
  • Two 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 :2021 · MCQ
  • A body weights 49N on a spring balance at the north pole. What will be its weight recorded on the same weighing machine, if it is shifted to the equator? [Use g=R2GM​ = 9.8 ms − 2 and radius of earth, R = 6400 km.]2021 · MCQ
  • A solid sphere of radius R gravitationally attracts a particle placed at 3R from its centre with a force F1. Now a spherical cavity of radius (2R​) is made in the sphere (as shown in figure) and the force becomes… Includes diagram2021 · MCQ
  • Two 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 TA and TB are the time periods of A and B respectively then the value of TB − TA : [Given : radius of earth… Includes diagram2021 · MCQ
  • Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The escape velocities of planet A and B are same. But A and B are of unequal mass. Reason R : The product of their mass…2021 · MCQ