Explore topic-wise MCQs in Engineering Physics.

This section includes 9 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.

A body is initially at rest. It explodes into two objects of mass 1 Kg and 2 Kg moving with a speed of 0.6 times the speed of velocity each. What would be the mass of the original body at rest?

A. 2 Kg
B. 2.5 Kg
C. 3.5 Kg
D. 3.75 Kg
Answer» E.
Discussion
2.

An object of rest mass 6 Kg is moving with a speed of 0.8c. Its effective mass is ____________

A. 6 Kg
B. 8 Kg
C. 10 Kg
D. 12 Kg
Answer» D. 12 Kg
Discussion
3.

A man, who weighs 60 kg on earth, weighs 61 kg on a rocket, as measured by an observer on earth. What is the speed of the rocket?

A. 2.5 X 10<sup>8</sup> m/s
B. 2.5 X 10<sup>7</sup> m/s
C. 5.5 X 10<sup>7</sup> m/s
D. 5.5 X 10<sup>8</sup> m/s
Answer» D. 5.5 X 10<sup>8</sup> m/s
Discussion
4.

At what speed the mass of an object would be double its value at rest?

A. 2 c
B. c/ 2
C. 3c/2
D. 2c/ 3
Answer» D. 2c/ 3
Discussion
5.

The speed of light is a limiting velocity, unattainable by a material body.

A. True
B. False
Answer» B. False
Discussion
6.

Which basic law is used for the derivation of mass variation with velocity?

A. Law of conservation of Energy
B. Law of conservation of Kinetic Energy
C. Law of conservation of Momentum
D. Law of conservation of mass
Answer» D. Law of conservation of mass
Discussion
7.

If the direction of velocity is changed by 180o simultaneously, the mass would _____________

A. Change simultaneously
B. Not Change
C. Increase
D. Decrease
Answer» C. Increase
Discussion
8.

The rest mass of a photon is equal to ___________

A. Gravitational mass
B. Relativistic mass
C. Inertial mass
D. Zero
Answer» E.
Discussion
9.

The lowest possible mass of a particle is its _____________

A. Relativistic mass
B. Inertial mass
C. Gravitational mass
D. Rest mass
Answer» E.
Discussion