Waves in Physics Mcqs

This collections of Multiple choice questions and answers focuses on study of Waves in Physics. These questions are chosen from a collection of most authoritative and best reference books on Physics. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate knowledge on Waves in Physics comprehensively.

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1.
A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency?

1/4f

1/2f

Frequency lower than 20 Hz

2f

2.
A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe

Always an node in formed

Always an antinode is formed

Neither node nor antinode is formed

Sometimes a node and sometimes an antinode is formed

3.
According to Newton sound travel in air under the conditions of

Adiabatic

Isothermal

Isobaric

Isochoric

4.
Beats are the results of

Diffraction of sound waves

Constructive and destructive interference

Polarization

Destructive interference

5.
Doppler effect applies to

Sound wave only

Light wave only

Both sound and light waves

Neither sound nor light wave

6.
For destructive interference of sound waves the path difference between two interfering sounds should be

N?

(n+1/2)?

Some time n? and some times (n+1/2)?

None of these

7.
Fundamental frequency of stationary waves in open pipe is ________ times the frequency in closed pipe.

One

Two

Four time

None of these

8.
If stretching force T of wire increases, then its frequency

Decreases

Increases

Remains the same

Any of above

9.
In open organ pipe

Only even harmonics are present

Only odd harmonics are present

Both even and odd harmonics are present

Selected harmonics are present

10.
In vibrating cord the points where the amplitude is maximum, are called

Antinodes

Nodes

Troughs

Crests

11.
Increase in velocity of sound in the air for 1 ?C rise in temperature is

1.61 ms-1

61.0 ms-1

0.61 ms-1

2.00 ms-1

12.
It is possible to distinguish between transverse and longitudinal waves form the property of

Refraction

Polarization

Interference

Diffraction

13.
Laplace found that the alternate compressions and rarefactions produced in sound waves follows

Isothermal law

Adiabatic law

Isochoric law

All of the above

15.
On loading the prong of a tuning form with wax its frequency

Increases

Decreases

Remains unchanged

May increase or decrease

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