Gravitation MCQs with Numerical Problems
Gravitation MCQs with Numerical Problems
Class: CBSE Class 11
Subject: Physics
Section: Gravitation
Topic: Gravitation MCQs with Numerical Problems
Board: CBSE Board Examination (Strictly NCERT Based)
Subject: Physics
Section: Gravitation
Topic: Gravitation MCQs with Numerical Problems
Board: CBSE Board Examination (Strictly NCERT Based)
Q1. Gravitational force between two masses is given by:
Answer: B
Explanation: Newton’s law of gravitation → F = Gm₁m₂/r².
Explanation: Newton’s law of gravitation → F = Gm₁m₂/r².
Q2. If distance between two masses doubles, force becomes:
Answer: C
Explanation: F ∝ 1/r² → doubling r → force = 1/4.
Explanation: F ∝ 1/r² → doubling r → force = 1/4.
Q3. Value of gravitational constant G:
Answer: A
Explanation: Universal gravitational constant.
Explanation: Universal gravitational constant.
Q4. Weight of 10 kg mass on Earth (g=9.8):
Answer: B
Explanation: W = mg = 10 × 9.8 = 98 N.
Explanation: W = mg = 10 × 9.8 = 98 N.
Q5. Acceleration due to gravity on Moon is about:
Answer: C
Explanation: Moon gravity ≈ 1/6 Earth.
Explanation: Moon gravity ≈ 1/6 Earth.
Q6. g unit:
Answer: m/s².
Q7. Escape velocity Earth:
Answer: 11.2 km/s.
Q8. Orbital velocity:
Answer: 7.9 km/s.
Q9. g decreases with:
Answer: Altitude.
Q10. g zero at Earth:
Answer: Centre.
Q11. Satellite stays due to:
Answer: Gravity providing centripetal force.
Q12. Potential energy formula:
Answer: −GMm/r.
Q13. Weightlessness in satellite:
Answer: Free fall state.
Q14. Kepler’s 3rd law relates:
Answer: T² ∝ r³.
Q15. g ∝:
Answer: 1/r².
Q16. Inside Earth g:
Answer: Decreases linearly.
Q17. Satellite period depends on:
Answer: Orbital radius.
Q18. Weight at poles vs equator:
Answer: Greater at poles.
Q19. Gravitational field unit:
Answer: N/kg.
Q20. Geostationary satellite period:
Answer: 24 hours.
Q21. Energy of satellite orbit:
Answer: Negative.
Q22. Escape velocity depends on:
Answer: Planet mass & radius.
Q23. Zero gravity region:
Answer: Centre of Earth.
Q24. Artificial satellite energy:
Answer: Constant in orbit.
Q25. If Earth mass doubles g:
Answer: Doubles.
Q26. If Earth radius doubles g:
Answer: One-fourth.
Q27. Binding energy of planet:
Answer: Negative PE.
Q28. Tides caused by:
Answer: Moon gravity.
Q29. g at height h formula:
Answer: g(1 − 2h/R).
Q30. First law of gravitation proposed by:
Answer: Newton.
