Class 11th Gravitation Chapter: MCQs on Important Topics

Class 11th Gravitation Chapter: MCQs on Important Topics

Below, we explore important topics from the Class 11th Gravitation Chapter, covering the requested subtopics: Newton's Law of Universal Gravitation, Gravitational Field, Gravitational Potential Energy, Kepler's Laws of Planetary Motion, and Escape Velocity. You'll find a series of Multiple-Choice Questions (MCQs) that test your understanding of these concepts.

1. Newton's Law of Universal Gravitation

• Which of the following is the mathematical formula for Newton's Law of Universal Gravitation?
  • a) F = m * g * r²
  • b) F = (G * m1 * m2) / r²
  • c) F = m * v²
  • d) F = m * g * v

2. Gravitational Field

• What is the gravitational field strength (E) defined as?

  • a) Force per unit mass
  • b) Force per unit length
  • c) Force per unit area
  • d) Force per unit velocity

• Which of the following is a unit used to represent gravitational field strength?

  • a) N/kg
  • b) m/s²
  • c) J/kg m
  • d) m²/s²

3. Gravitational Potential Energy

• Which formula is used to compute the gravitational potential energy (U) of an object at a height h from the ground?
  • a) U = m * g * h
  • b) U = m * v² / 2
  • c) U = m * g * h²
  • d) U = m * g * h * v

4. Kepler's Laws of Planetary Motion

• Which of the following describes Kepler's First Law of Planetary Motion?

  • a) All planets orbit the sun in the same direction
  • b) Planets move in elliptical orbits with the sun at one focus
  • c) Planets move in a straight line
  • d) Planets move in the same orbital period

• Which of the following describes Kepler's Second Law of Planetary Motion?

  • a) The distance from the sun to a planet remains constant
  • b) A line segment joining the sun and a planet sweeps out equal areas in equal time intervals
  • c) The time taken by a planet to orbit the sun increases as it goes farther from the sun
  • d) The inclination of a planet's orbit changes over time

• Which of the following describes Kepler's Third Law of Planetary Motion?

  • a) The period of a planet's orbit is proportional to the square root of the semi-major axis
  • b) The period of a planet's orbit is proportional to the cube root of the semi-major axis
  • c) The period of a planet's orbit is proportional to the mass of the sun
  • d) The period of a planet's orbit is proportional to the number of planets in the solar system

5. Escape Velocity

• Which of the following is the formula for escape velocity (v_e)?

  • a) v_e = √(2 * G * M / r)
  • b) v_e = G * M / r²
  • c) v_e = M * g
  • d) v_e = M * v/r

• What is the escape velocity of an object from Earth's surface?

  • a) 1 m/s
  • b) 10 km/s
  • c) 30 m/s
  • d) 10,000 m/s

Remember, the purpose of these MCQs is not to assess your ability to memorize facts, but to test your ability to apply and reason with the concepts you've learned. By working through these questions, you'll reinforce your understanding of these important gravitation concepts. Good luck!