Physics – Class 11 Mock Test 6

10%

Question 1 of 10

1. The maximum value of gravitational potential energy is zero.

False

True

Question 1 of 10

Question 2 of 10

2. The universal law of gravitation becomes more inapplicable as the size and distance between objects decreases.

False

True

Question 2 of 10

Question 3 of 10

3. For which of the following does the graph denote the variation of force of gravity “F” along a distance “r”?

Plate

Solid sphere

Spherical shell

Point

Question 3 of 10

Question 4 of 10

4. The time period of a simple pendulum on the surface of the earth is “T”. What will be the time period of the same pendulum at a height of 2 times the radius of the earth?

Question 4 of 10

Question 5 of 10

5. What apparatus did Henry Cavendish use in his experiment to determine the gravitational constant?

2 bar, 2 small spheres and 1 large sphere

2 bar, 1 small sphere and 2 large spheres

1 bar, 1 small sphere and 1 large sphere

1 bar, 2 small spheres and 2 large spheres

Question 5 of 10

Question 6 of 10

6. The velocity of a planet is constant throughout its elliptical trajectory in an orbit.

True

False

Question 6 of 10

Question 7 of 10

7. Assume that the earth is a perfect sphere but of non-uniform interior density. Then, acceleration due to gravity on the surface of the earth _____

cannot be zero at any point

will be different at different points on the surface

will be towards the geometric centre

will be equal at all points on the surface and directed towards the geometric centre

Question 7 of 10

Question 8 of 10

8. The value of universal gravitational constant changes is which of the following medium?

Water

Plasma

Air

The gravitational constant is independent of the medium

Question 8 of 10

Question 9 of 10

9. The escape velocity for an object to leave the surface of the earth does not depend on its size, shape, mass or direction of projection of the body.

True

False

Question 9 of 10

Question 10 of 10

10. Consider an object of mass “M” moving through a tunnel dug in the earth passing through the centre of the earth as shown. Which of the following is true?

The object always has both inertia and weight

The object has zero inertia throughout the tunnel

The object’s inertia is zero only at the centre

The object’s inertia is non-zero at the centre but weight is zero at the centre

Question 10 of 10