Quiz for Gravitation

Q1: What is the value of gravitational constant G?

A. 6.67 × 10⁻¹¹ Nm²/kg² B. 9.8 m/s² C. 3 × 10⁸ m/s D. 1.6 × 10⁻¹⁹ C

Q2: Which law governs the force between two masses?

A. Coulomb’s law B. Newton’s law of gravitation C. Hooke’s law D. Kepler’s law

Q3: Gravitational force is:

A. Always repulsive B. Always attractive C. May be repulsive or attractive D. Zero

Q4: Acceleration due to gravity on Earth is approximately:

A. 9.8 m/s² B. 6.67 × 10⁻¹¹ m/s² C. 10 m/s² D. 0 m/s²

Q5: Value of g decreases with:

A. Increase in altitude B. Decrease in altitude C. Increase in mass D. Increase in time

Q6: Escape velocity from Earth is approximately:

A. 11.2 km/s B. 7.9 km/s C. 3.0 km/s D. 9.8 km/s

Q7: Which of the following affects the value of g?

A. Mass of object B. Height above Earth C. Color of object D. Temperature

Q8: Gravitational potential energy is:

A. Always positive B. Always negative C. Zero D. Always constant

Q9: Kepler’s third law states that:

A. T² ∝ r³ B. T ∝ r C. T³ ∝ r² D. T² ∝ 1/r

Q10: Weight of a body is:

A. Same everywhere B. Maximum at poles C. Maximum at equator D. Independent of location

Q11: The orbital velocity of a satellite is given by:

A. √(GM/R) B. GM/R² C. 2πR/T D. v = at

Q12: The path of a planet around the Sun is:

A. Circle B. Ellipse C. Parabola D. Straight line

Q13: Gravitational field intensity is a:

A. Scalar quantity B. Vector quantity C. Dimensionless quantity D. None

Q14: A satellite in a geostationary orbit has:

A. Constant angular velocity B. Constant linear velocity C. Variable altitude D. Zero speed

Q15: Weightlessness in orbit is due to:

A. Zero gravity B. Free fall C. No air D. Rotation of Earth

Q16: Which quantity remains conserved in orbit?

A. Linear momentum B. Gravitational potential energy C. Angular momentum D. Kinetic energy

Q17: If distance between two bodies is doubled, force becomes:

A. Four times B. Half C. One fourth D. Double

Q18: The unit of gravitational field is:

A. N B. N/kg C. kg/N D. N·m²/kg²

Q19: Gravitational self-energy of a body is:

A. Always positive B. Always negative C. Zero D. Infinity

Q20: Which planet has the strongest gravity?

A. Earth B. Mars C. Jupiter D. Venus