NCERT Class 11 Physics MCQ Chapter 7 Gravitation Solutions, AHSEC Class 11 Physics Multiple Choice Question Answer to each chapter is provided in the list so that you can easily browse throughout different chapters NCERT Class 11 Physics MCQ Chapter 7 Gravitation Question Answer and select needs one.
Class 11 Physics MCQ Chapter 7 Gravitation
Also, you can read the SCERT book online in these sections NCERT Class 11 Physics Multiple Choice Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. AHSEC Class 11 Physics MCQ Solutions. These solutions are part of SCERT All Subject Solutions. Here we have given HS 1st Year Physics Objective Type Question Answer for All Subjects, You can practice these here.
Gravitation
Chapter: 7
| PART – Ⅰ |
MULTIPLE CHOICE QUESTION ANSWER
1. According to Kepler’s first law, the shape of the planet’s orbit is:
(i) Circle.
(ii) Ellipse.
(iii) Parabola.
(iv) Hyperbola.
Ans: (ii) Ellipse.
2. Who was prosecuted for supporting Copernicus’ heliocentric model?
(i) Kepler.
(ii) Newton.
(iii) Galileo.
(iv) Ptolemy.
Ans: (iii) Galileo.
3. In which region of earth the weight of a body is slightly greater than the other regions?
(i) At the polar region.
(ii) At the equator.
(iii) Tropic of Cancer.
(iv) None of this.
Ans: (i) At Polar region.
4. In Kepler’s third law, the square of the orbital period of a planet is proportional to the cube of its:
(i) Distance from the Sun.
(ii) Speed.
(iii) Mass.
(iv) Radius.
Ans: (i) Distance from the Sun.
5. If the radius of earth is decreased keeping its mass constant, then the length of day will:
(i) Decrease.
(ii) Increase.
(iii) All of the above.
(iv) None of the above.
Ans: (i) Decrease.
6. If the distance between the Earth and the Sun is doubled, the gravitational force between them will:
(i) Increase by a factor of 2.
(ii) Decrease by a factor of 4.
(iii) Decrease by a factor of 2.
(iv) Increase by a factor of 4.
Ans: (ii) Decrease by a factor of 4.
7. How does the weight of a body change with an increase in the speed of rotation of the earth?
(i) Weight of the body will increase.
(ii) Weight of the body will decrease.
(iii) Weight of the body remains constant.
(iv) Cannot be answered.
Ans: (ii) Weight of the body will decrease.
8. What would be the escape velocity of a planet whose mass and radius are double from earth with the escape velocity of earth taken as Ve.
(i) Ve.
(ii) 2 Ve.
(iii) 4 Ve.
(iv) 16 Ve.
Ans: (ii) 2 Ve.
9. Who first experimentally determined the value of the gravitational constant (G)?
(i) Isaac Newton.
(ii) Albert Einstein.
(iii) Henry Cavendish.
(iv) Galileo Galilei.
Ans: (iii) Henry Cavendish.
10. Which of the following objects exerts the greatest gravitational force on the Earth?
(i) The Sun.
(ii) The Moon.
(iii) Jupiter.
(iv) Mars.
Ans: (i) The Sun.
11. Which of the following is true about the acceleration due to gravity at Earth’s surface?
(i) It is maximum at the poles.
(ii) It increases with height.
(iii) It remains constant everywhere.
(iv) It decreases as you go down below the Earth’s surface.
Ans: (i) It is maximum at the poles.
12. Gravitational potential energy is zero at which point?
(i) At the surface of Earth.
(ii) At a distance infinitely far from Earth.
(iii) At the centre of Earth.
(iv) At the height where the gravitational force is maximum.
Ans: (ii) At a distance infinitely far from Earth.
13. Which of the following formulas gives the escape velocity of a body from a planet?
(i) v = √(2GM/R)
(ii) v = √(GM/R)
(iii) v = 2GM/R²
(iv) v = √(GR/M)
Ans: (i) v = √(2GM/R)
14. A body weighs 500 N on the surface of the earth. How much would it weigh half way below the surface of the earth?
(i) 1000 N.
(ii) 500 N.
(iii) 250 N.
(iv) 125 N.
Ans: (iii) 250 N.
15. The escape speed of a body from the Earth depends on:
(i) The mass of the body.
(ii) The location from where it is projected.
(iii) The direction of projection.
(iv) The height of the location from where the body is launched.
Ans: (ii) The location from where it is projected.
