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Gravitation JEE Mains Questions

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Gravitation JEE Mains Questions. We covered all the Gravitation JEE Mains Questions in this post for free so that you can practice well for the exam.

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MCQ on Gravitation for JEE Students

If the earth rotates faster than its present speed, the acceleration due to gravity will

(a) Increase at the equator but remain unchanged at the poles.

(b) decrease at the equator but remain unchanged at the poles.

(c) remain unchanged at the equator but decrease at the poles.

(d) remain unchanged at the equator but increase at the poles.

Option b – decrease at the equator but remain unchanged at the poles

Acceleration due to the gravity of the planet decreases with ……….

(a) decrease in the radius of the planet

(b) increase in mass of the planet

(c) decrease in mass of the body

(d) increase in altitude from the surface of the planet

Option d – increase in altitude from the surface of the planet

The free-fall acceleration g increases as one proceeds at sea level, from the equator towards either pole. The reason is

(a) earth is a sphere with the same density everywhere.

(b) Earth is a sphere with different densities in the polar regions than in the equatorial regions.

(c) Earth is approximately an ellipsoid having an equatorial radius greater than its polar radius by 21 km.

(d) Earth is approximately an ellipsoid having its equatorial radius smaller than its polar radius by 21 km.

Option c – Earth is approximately an ellipsoid having an equatorial radius greater than its polar radius by 21 km

The weight of the human body is

(a) maximum at the poles.

(b) same at every place on the earth’s surface.

(c) maximum at the equator.

(d) more on the mountains than planes.

Option a – maximum at the poles

The weight of an object on the moon is equal ……… to its weight on the earth.

(a) 1/6th

(b) 1/8th

(c) 1/4th

(d) 1/10th

Option a – 1/6th

The weight of an object on the earth is 150 N. Its weight on the moon will be

(a) 150 N

(b) 75 N

(c) 25 N

(d) 50 N

Option c – 25 N

If the mass of an object is 600 kg, what will be its weight on the moon? (N = Newton)

(a) 60 N

(b) 600 N

(c) 100 N

(d) 10 N

Option c – 100 N

A person can jump higher on the moon’s surface than on the earth because

(a) the moon’s surface is rough.

(b) the acceleration due to gravity on the moon is smaller than that on the earth.

(c) the moon is cooler than earth.

(d) the moon has no atmosphere.

Option b – the acceleration due to gravity on the moon is smaller than that on the earth

Consider the following statements. The acceleration due to the earth’s gravity decreases if I. we go up from the surface of the earth. II. we go from the equator towards the pole. III. the rotation speed of the earth is increased. IV. we go down from the surface of the earth towards its centre. Which of these statements is correct?

(a) I, II and III

(b) I, III and IV

(c) I, II and IV

(d) I, II, III and IV

Option b – I, III and IV

Assertion (A) There is no effect of the rotation of the earth on acceleration due to gravity at the poles. Reason (R) Rotation of the earth is about the polar axis. Codes

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true, but R is not the correct explanation of A

(c) A is true, but R is false

(d) A is false, but R is true

Option a – Both A and R are true and R is the correct explanation of A

Which one of the following statements about the mass of a body is correct?

(a) It changes from one place to another.

(b) It is the same everywhere.

(c) It depends on its shape.

(d) It does not depend on its temperature.

Option b – It is the same everywhere

Which one of the following statements is correct?

(a) The measurement of mass taken by a spring weighing balance is correct at the place where the spring balance is calibrated for.

(b) The measurement of mass taken by a spring weighing balance is correct at all places.

(c) The measurement of mass taken by a spring weighing balance is correct at the places where the acceleration due to gravity is the same as the place where the spring balance is calibrated for.

(d) A spring balance cannot be used to measure mass at any place.

Option d – A spring balance cannot be used to measure mass at any place

What is weight?

(a) Weight can be determined by only a spring balance.

(b) The weight of a body is constant.

(c) The force with which the earth attracts towards its centre.

(d) The weight of a body has a direction towards the centre of the earth. So it is a vector quantity.

Option c – The force with which the earth attracts towards its centre

The weight of a body at the centre of Earth is

(a) half the weight at the surface

(b) zero

(c) twice the weight at the surface

(d) infinite

Option b – zero

If the distance between the earth and the sun were twice what it is now, the gravitational force exerted on the earth by the sun would be

(a) twice as large as it is now.

(b) four times as large as it is now.

(c) one-fourth of what it is now.

(d) Half of what it is now.

Option c – one-fourth of what it is now

In which of the following places is the acceleration due to gravity zero?

(a) At the centre of the earth

(b) At the poles

(c) At the equator

(d) At sea level

Option a – At the centre of the earth

The value of acceleration due to gravity (g) ……….

(a) is greater at the poles than at the equator

(b) is lesser at the poles than at the equator

(c) is greater at the North pole than at the South pole

(d) is greater at the South pole than at the North pole

Option a – is greater at the poles than at the equator

Which one of the following statements about gravitational force is not correct?

(a) It is experienced by all bodies in the universe.

(b) It is a dominant force between celestial bodies.

(c) It is a negligible force for atoms.

(d) It is the same for all pairs of bodies in our universe.

Option d – It is the same for all pairs of bodies in our universe

In respect of the difference between the gravitational force from electric and magnetic forces, which one of the following statements is true?

(a) Gravitational forces are stronger than the other two.

(b) Gravitational force is attractive only, whereas electric and magnetic forces are attractive as well as repulsive.

(c) The gravitational force has a very short range.

(d) Gravitational force is a long-range force, while the other two are short-range forces.

Option b – Gravitational force is attractive only, whereas electric and magnetic forces are attractive as well as repulsive

Who was the first to experimentally determine the value of the Universal Gravitational Constant (G)?

(a) Henry Cavendish

(b) Isaac Newton

(c) Laurent Freidel

(d) Johannes Kepler

Option a – Henry Cavendish

The magnitude of the gravitational force will be equal to the ……. ( Gravitation JEE Mains Questions )

(a) product of mass and acceleration due to the gravitational force.

(b) the ratio of mass and acceleration due to the gravitational force.

(c) the ratio of acceleration due to the gravitational force and mass.

(d) reciprocal of the product of mass and acceleration due to the gravitational force.

Option a – product of mass and acceleration due to the gravitational force

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