Explore topic-wise MCQs in Engineering Physics.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

If a machine is lubricated with oil ___________

A. The mechanical advantage of the machine increases
B. The mechanical efficiency of the machine increases
C. Both its mechanical advantage and efficiency increases
D. Its efficiency increases, but its mechanical advantage decreases
Answer» C. Both its mechanical advantage and efficiency increases
Discussion
2.

Two masses of 1g and 4g are moving with equal kinetic energy. The ratio of the magnitudes of their momenta is ___________

A. 4:1
B. √2:1
C. 1:2
D. 1:16
Answer» D. 1:16
Discussion
3.

The mechanical energy of a system is always conserved.

A. True
B. False
Answer» C.
Discussion
4.

In an elastic collision of two billiard balls, the total kinetic energy is conserved ___________

A. Completely
B. For a short duration
C. For a long duration but not completely
D. Never
Answer» C. For a long duration but not completely
Discussion
5.

An artificial satellite orbiting the earth in very thin atmosphere loses its energy gradually due to dissipation against atmospheric resistance, however small. As it comes closer and closer to earth, its speed ___________

A. Decreases progressively
B. Remains constant
C. Becomes non-uniform
D. Increases progressively
Answer» E.
Discussion
6.

Comets mover around the sun in highly elliptical orbits. The gravitational force on the comet due to the sun is not normal to the comet’s velocity in general. Yet the work done by the gravitational force over every orbit of the comet is zero. Why?

A. The gravitational force is conservative, hence work done is zero
B. The gravitational force is non-conservative, hence work done is zero
C. Energy is absent, hence work done is zero
D. Force is in negative direction
Answer» B. The gravitational force is non-conservative, hence work done is zero
Discussion
7.

IF_A_MACHINE_IS_LUBRICATED_WITH_OIL?$

A. The mechanical advantage of the machine increases
B. The mechanical efficiency of the machine increases
C. Both its mechanical advantage and efficiency increases
D. Its efficiency increases, but its mechanical advantage decreases
Answer» C. Both its mechanical advantage and efficiency increases
Discussion
8.

Two masses of 1g and 4g are moving with equal kinetic energy. The ratio of the magnitudes of their momenta i?
A. 4:1
B. ‚àö2:1
C. 1:2
D. 1:16
Answer» D. 1:16
Discussion
9.

The mechanical energy of a system is always conserved.
A. True
B. False
Answer» C.
Discussion
10.

Which of the following is an example for a force which does work on a body but fails to change its kinetic energy?

A. A body pulled through a plain surface
B. A body pulled through a vertical surface
C. A body pulled through a horizontal surface
D. A body at rest
Answer» D. A body at rest
Discussion
11.

In an elastic collision of two billiard balls, the total kinetic energy is conserved

A. Completely
B. For a short duration
C. For a long duration but not completely
D. Never
Answer» C. For a long duration but not completely
Discussion
12.

In which of the following the momentum and energy of each body not conserved?

A. Inelastic collision
B. Oblique collision
C. Elastic collision
D. Head on collision
Answer» D. Head on collision
Discussion
13.

In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the system.

A. True
B. False
Answer» B. False
Discussion
14.

An artificial satellite orbiting the earth in very thin atmosphere loses its energy gradually due to dissipation against atmospheric resistance, however small. As it comes closer and closer to earth, its speed

A. Decreases progressively
B. Remains constant
C. Becomes non-uniform
D. Increases progressively
Answer» E.
Discussion
15.

Comets mover around the sun in highly elliptical orbits. The gravitational force on the comet due to the sun is not normal to the comet’s velocity in general. Yet the work done by the gravitational force over every orbit of the comet is zero. Why?$

A. The gravitational force is conservative, hence work done is zero
B. The gravitational force is non-conservative, hence work done is zero
C. Energy is absent, hence work done is zero
D. Force is in negative direction
Answer» B. The gravitational force is non-conservative, hence work done is zero
Discussion
16.

A body can have momentum without energy.

A. True
B. False
Answer» C.
Discussion