BSNL TTA Applied Physics MCQ Part One

Attempt Free BSNL TTA Applied Physics MCQ Part One Here. Read The Important BSNL MCQ From Below.

1) Which one is not matched correctly?

a Infrasonic waves-(below 20Hz)
b Audible waves-(20Hz to 20KHz)
c Ultrasonics waves-(above 20KHz)
d Short radio waves-(1Hz to 10 ⁴Hz)
Ans. d

2) Application of ultrasonics waves is/are:

a Sending signals,cleaning clothes and machinery parts of clocks
b Measuring the depth of sea,ultrasonography
c Removing lamp shoot from chimney
d All of these
Ans. d

3) When a sound enters from one medium to another medium then its:

a Speed and wavelength constant
b Frequency remain constant
c Frequency changes
d Frequency and wavelength remain constant
Ans. b

BSNL TTA Applied Physics MCQ Part One

4) Speed of sound not depend on:

a Pressure
b Temperature
c Density
d All of these
Ans. a

5) The sound waves received after being reflected from a high tower or mountain is called?

a Pitch
b Loudness
c Echo
d Intensity
Ans. c

6) The ratio of the velocity of the source to the velocity of sound is called:

a Dopplers effect
b Mach number
c Intensity of waves
d Speed of sound
Ans. b

BSNL TTA Applied Physics MCQ Part One

7) If there is a relative motion between the source of sound and observer, the apparent frequency of the sound heard by the observer is different from the actual frequency of sound this is known as:

a Dopplers effects
b Maxwells effects
c Mach effects
d Bernoullies effects
Ans. a

8) Unit of loudness is:

a Mach number
b Phone
c Bel
d Watt meter²
Ans. b

9) Which one is an example of the transverse wave?

a Waves on strings under tension
b Waves on springs
c Sound wave in air
d All of these
Ans. a

10) Bel is unit of?

a Pitch
b Loudness
c Intensity of sound
d Echo of sound
Ans. c

BSNL TTA Applied Physics MCQ Part One

11) Which one is an example of the longitudinal wave?

a Sound waves in air
b Waves on surface of water
c Waves on strings under tension
d Light wave
Ans. a

12) Intensity of sound change with:

a Inversely proportional to square of distance from source
b Directly proportional to square of amplitude
c Directly proportional to density of medium
d All of these
Ans. d

13) Watt per meter square (wm⁻²) is used to represent:

a Loudness
b Echo
c Pitch
d Intensity
Ans. d

BSNL TTA Applied Physics MCQ Part One

14) Which one is true about electromagnetic waves?

a. Its wave length range is 10⁻⁴m to 10⁴m
b They propagate at velocity of light
c Its built by Photon
d All of these
Ans. d

15) Which one is/are true?

a A body with Mach number <1 then its speed is supersonic
b A body with Mach number >5 then its speed is ultrasonic
c Both is true
d None of these
Ans. b

16) Which one is not correctly matched?

a Gama rays- Becquerel
b Ultraviolet rays-Johann Ritter
c Long radio waves-Marconi
d X-rays -harshly
Ans. d

17) The wave which does not require medium for their propagation is

a Longitudinal waves
b Elastic waves
c Mechanical waves
d Electromagnetic waves
Ans. d

BSNL TTA Applied Physics MCQ Part One

18) Which one is true?

a V=nλ
b V/nλ
c Nλ/v
d All of these
Ans. a

19) Which properties of sound show sound are grave or shrill?

a Intensity
b Loudness
c Quality
d Pitch
Ans. d

20) if the particles of the medium vibrate in the direction of propagation of the wave, the wave is called?

a Longitudinal waves
b Transverse waves
c Electromagnetic waves
d All of these
Ans. a

21) The relation between loudness and intensity of sound is: