Laws of Gravitation and Satellite Motion MCQs
Laws of Gravitation and Satellite Motion MCQs
Class: CBSE Class 11
Subject: Physics
Section: Gravitation
Topic: Laws of Gravitation and Satellite Motion MCQs
Board: CBSE Board Examination (Strictly NCERT Based)
Subject: Physics
Section: Gravitation
Topic: Laws of Gravitation and Satellite Motion MCQs
Board: CBSE Board Examination (Strictly NCERT Based)
Q1. Newton’s law of gravitation states force ∝
Answer: C
Explanation: F = Gm₁m₂/r².
Explanation: F = Gm₁m₂/r².
Q2. Gravitational force is always:
Answer: B
Explanation: Gravity is always attractive.
Explanation: Gravity is always attractive.
Q3. Orbital velocity of Earth satellite:
Answer: 7.9 km/s
Explanation: Required for low Earth orbit.
Explanation: Required for low Earth orbit.
Q4. Escape velocity Earth:
Answer: 11.2 km/s
Explanation: Minimum speed to escape Earth gravity.
Explanation: Minimum speed to escape Earth gravity.
Q5. Satellite motion due to balance between:
Answer: B
Explanation: Gravity provides centripetal force.
Explanation: Gravity provides centripetal force.
Q6. g ∝
Answer: 1/r².
Q7. Satellite period depends on:
Answer: Orbital radius.
Q8. Kepler’s 3rd law:
Answer: T² ∝ r³.
Q9. Weightlessness occurs due to:
Answer: Free fall.
Q10. Geostationary satellite period:
Answer: 24 hours.
Q11. Geostationary orbit lies in:
Answer: Equatorial plane.
Q12. Escape velocity depends on:
Answer: Mass & radius.
Q13. Satellite energy is:
Answer: Negative.
Q14. Orbital speed independent of:
Answer: Satellite mass.
Q15. Artificial satellite example:
Answer: INSAT.
Q16. g decreases with altitude because:
Answer: Distance increases.
Q17. Potential energy sign:
Answer: Negative.
Q18. Satellite path:
Answer: Elliptical.
Q19. Binding energy of satellite:
Answer: Negative total energy.
Q20. First satellite:
Answer: Sputnik-1.
Q21. Satellite acceleration equals:
Answer: Centripetal acceleration.
Q22. If orbital radius increases speed:
Answer: Decreases.
Q23. Communication satellites are:
Answer: Geostationary.
Q24. Satellite launch direction:
Answer: Eastward.
Q25. Orbital velocity formula:
Answer: √(GM/R).
Q26. Escape velocity formula:
Answer: √(2GM/R).
Q27. Satellite weight:
Answer: Zero apparent weight.
Q28. Moon is satellite of:
Answer: Earth.
Q29. Gravitational field unit:
Answer: N/kg.
Q30. Satellite remains in orbit due to:
Answer: Continuous free fall.
