Explore topic-wise MCQs in Physics.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

What will be the terminal velocity of a rain drop of radius (r) 1mm and mass (M) 0.001g falling through air. The coefficient of viscosity of air ( ) is 1.8 X 10-5Ns/m2? Neglect buoyant force.

A. 20 m/s
B. 29.47 m/s
C. 35.8 m/s
D. 40 m/s
Answer» C. 35.8 m/s
Discussion
2.

On which these factors does air/fluid resistance force, acting on a spherical body, not depend?

A. Radius of body
B. Velocity of body
C. Coefficient of viscosity
D. Density of body
Answer» E.
Discussion
3.

In a closed pipe of radius R, fluid (having some viscosity) is flowing laminarly. Which point along a cross section will have maximum speed?

A. Centre
B. Near the wall of pipe
C. R/2 from centre
D. All points will have same speed
Answer» B. Near the wall of pipe
Discussion
4.

What is the effect of temperature increase on viscosity of liquids and gases?

A. Increases for both liquids and gases
B. Increases for liquids and decreases for gases
C. Increases for gases and decreases for liquids
D. Decreases for both liquids and gases
Answer» D. Decreases for both liquids and gases
Discussion
5.

The coefficient of viscosity is equal to the ratio of shear stress to shear strain. True or False?

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

Coefficient of viscosity doesn t depend on temperature because it is a property of the fluid. True or False?

A. True
B. False
Answer» C.
Discussion
7.

1 poise = _________ Ns/m2. Fill in the blanks.

A. 0.01
B. 0.1
C. 1
D. 10
Answer» C. 1
Discussion
8.

Viscosity is said to be internal friction between fluid layers. What type of force is it?

A. Electromagnetic
B. Gravitational
C. Weak Nuclear forces
D. Strong Nuclear forces
Answer» B. Gravitational
Discussion