Fluid Dynamics and Oscillations MCQ's 1

A test from chapter 6 and 7 i.e Fluid Dynamics and Oscillations of Physics part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. When a particle oscillates simple harmonically its kinetic energy varies periodically. Its frequency of the particle in n, the frequency of the kinetic energy is:

A) n/2
B) n
C) 2n
D) 4n

2. The displacement of a particle executing SHM is given by x=0.01sin100 π(t+0.05). The time period is:

A) 0.01 sec
B) 0.02 sec
C) 0.1 sec
D) 0.2 sec

3. In a laminar flow the velocity of the liquid in contact with the walls of the tube is:

A) Zero
B) maximum
C) in between zero and maximum
D) equal to critical velocity

4. Two spheres of same material but radii R and 2R are allowed to fall in a liquid, the ratio of their terminal velocities is:

A) 1:4
B) 1:2
C) 1:32
D) 2:1

5. Time period of a particle executing SHM is T. The time taken by particle to move distance equal to half of the amplitude is:

A) T/4
B) T/6
C) T/8
D) T/12

6. In Bernoulli's theorem which of the folowing is conserved:

A) mass
B) energy
C) Linear momentum
D) all of these

7. A liquid distrubed by stirring comes to rest after some time due to property of:

A) Surface tension
B) Viscosity
C) Molecular attraction
D) low compressibility

8. With increase in temperature, the viscosity of:

A) Both gases and liquid increases
B) Both gases and liquids decreases
C) Gases increases and of liquids decreases
D) Gases decreases and of liquids increases

9. If a small sphere is let fall vertically in a large quantity of still liquid of denisty smaller than that of the material of the sphere:

A) At first its velocity increases, but soon approaches a constant value
B) It falls with a constant velocity all along from the very beginning
C) At first it falls with a constant velocity which after some time goes on decreasing
D) Nothing can be said about its motion

10. Which one of the following connot be explained on the basis of Bernoulli's theorem?

A) Blowing off of light roofs when strong winds blow
B) cruved path followed by a spinning ball
C) working of an atomizer
D) rise of a liquid through a capillary