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.

A torque of 2×10-4 Nm is applied to produce an angular acceleration of 4rad/s2 in a rotating body. What is the moment of inertia of the body?

A. 0.5 kgm2
B. 5×104 kgm2
C. 0.5×10-4 kgm2
D. 0.5×104 kgm2
Answer» D. 0.5×104 kgm2
Discussion
2.

Calculate the moment of inertia of the earth about its diameter, taking it to be a sphere of 1025kg and diameter 12800km.

A. 1.64 kgm2
B. 16.4×1038 kgm2
C. 1.64×1038 kgm2
D. 0
Answer» D. 0
Discussion
3.

The moment of inertia of a uniform circular disc about its diameter is 100 gcm2. What is its moment of inertia about an axis perpendicular to its plane.

A. 500 gcm2
B. 100 gcm2
C. 200 gcm2
D. 700 gcm2
Answer» D. 700 gcm2
Discussion
4.

The moment of inertia of a uniform circular disc about its diameter is 100gcm2. What is its moment of inertia about its tangent?

A. 200 gcm2
B. 100 gcm2
C. 900 gcm2
D. 500 gcm2
Answer» E.
Discussion
5.

The flying wheel attached to the shaft of steam engine works on the principle of ___________

A. Centripetal action
B. Moment of inertia
C. Newton’s third law of motion
D. Conservation of momentum
Answer» C. Newton’s third law of motion
Discussion
6.

On being displaced, the centre of mass of unstable equilibrium goes ___________

A. Higher
B. Neither higher nor lower
C. First higher and then lower
D. Lower
Answer» E.
Discussion
7.

CALCULATE_THE_MOMENT_OF_INERTIA_OF_THE_EARTH_ABOUT_ITS_DIAMETER,_TAKING_IT_TO_BE_A_SPHERE_OF_1025KG_AND_DIAMETER_12800KM.?$

A. 1.64 kgm<sup>2</sup>
B. 16.4√ó10<sup>38</sup> kgm<sup>2</sup>
C. 1.64√ó10<sup>38</sup> kgm<sup>2</sup>
D. 0
Answer» D. 0
Discussion
8.

A_torque_of_2√ó10-4_Nm_is_applied_to_produce_an_angular_acceleration_of_4rad/s2_in_a_rotating_body._What_is_the_moment_of_inertia_of_the_body?$#

A. 0.5 kgm<sup>2</sup>
B. 5√ó10<sup>4</sup> kgm<sup>2</sup>
C. 0.5√ó10<sup>-4</sup> kgm<sup>2</sup>
D. 0.5√ó10<sup>4</sup> kgm<sup>2</sup>
Answer» D. 0.5‚Äö√†√∂‚àö‚â•10<sup>4</sup> kgm<sup>2</sup>
Discussion
9.

The moment of inertia of a uniform circular disc about its diameter is 100 gcm2. What is its moment of inertia about an axis perpendicular to its plane?

A. 500 gcm<sup>2</sup>
B. 100 gcm<sup>2</sup>
C. 200 gcm<sup>2</sup>
D. 700 gcm<sup>2</sup>
Answer» D. 700 gcm<sup>2</sup>
Discussion
10.

The moment of inertia of a uniform circular disc about its diameter is 100gcm2. What is its moment of inertia about its tangent?

A. 200 gcm<sup>2</sup>
B. 100 gcm<sup>2</sup>
C. 900 gcm<sup>2</sup>
D. 500 gcm<sup>2</sup>
Answer» E.
Discussion
11.

A wheel of mass 8kg and radius of gyration 25cm is rotating at 300rpm. What is its moment of inertia?

A. 0.5 kgm<sup>2</sup>
B. 10 kgm<sup>2</sup>
C. 5 kgm<sup>2</sup>
D. 0.25 kgm<sup>2</sup>
Answer» B. 10 kgm<sup>2</sup>
Discussion
12.

The flying wheel attached to the shaft of steam engine works on the principle of

A. Centripetal action
B. Moment of inertia
C. Newton’s third law of motion
D. Conservation of momentum
Answer» C. Newton‚Äö√Ñ√∂‚àö√ë‚àö¬•s third law of motion
Discussion
13.

Moment of inertia can be regarded as the measure of the rotational inertia of the body.

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

Which of the following stays in equilibrium even after being slightly displaced?

A. Stable equilibrium
B. Unstable equilibrium
C. Neutral equilibrium
D. Rigid body
Answer» D. Rigid body
Discussion
15.

On being displaced, the centre of mass of unstable equilibrium goes
A. Higher
B. Neither higher nor lower
C. First higher and then lower
D. Lower
Answer» E.
Discussion
16.

In stable equilibrium, a body has maximum potential.

A. True
B. False
Answer» C.
Discussion