Physics 10 Unit 11 MCQs Tests

In this post, we have prepared 3 MCQs tests of Federal Board Physics 10 Unit 11 MCQs Tests. For more Class 10 Physics MCQs Tests visit this page.

Physics 10 Unit 11 MCQs Tests

Practice MCQs Test No 1

/20

1027

Class 10 Physics

Chapter 11

Practice MCQs Test No 1

1 / 20

The study of sound is called

Electrostatics

Optics

All of these

Acoustic

2 / 20

The amplitude of 100 dB sound is:

10,000

1001000

100,000

1000

3 / 20

Sound is produced by

None of these

Vibration

Propagation

Both of these

4 / 20

1 bell is equal to

10 dB

20 dB

100 dB

50 dB

5 / 20

By using a/an __________ we can see sound wave.

Electroscope

Gastroscope

Oscilloscope

Stroboscope

6 / 20

Characteristic by which we can distinguish between two sounds of same loudness and pitch is called

Pitch

Quality

Loudness

Intensity of sound

7 / 20

Sound is ___________ Wave

Longitudinal

Electromagnetic

None of these

Transverse

8 / 20

The loudness of sound is directly proportional to logarithm of intensity, this law is called ________

Intensity Level

Echo

Weber Fechner Law

Law of Gravitation

9 / 20

Distance between two consecutive compressions and rarefactions is the _____________ of sound wave.

Amplitude

none of these

Wave length

Frequency

10 / 20

Intensity is a _____ quantity.

Vector

none of these

Scalar

Physical quantity

11 / 20

Sound can travel only in presence of

vacuum

Air

Both Medium and Air

Medium

12 / 20

_________ is the characteristic of sound by which we can distinguish between a shrill and a grave sound.

loudness

Pitch

Quality

Intensity

13 / 20

Loudness of sound depends on

All of these

Amplitude of vibrating body

Area of vibrating body

Distance of vibrating body

14 / 20

Intensity of faintest sound is

10¹² Wm⁻²

10⁻⁸ Wm⁻²

10⁻⁹ Wm⁻²

10⁻¹² Wm⁻²

15 / 20

The intensity of sound depends on the _________ of sound.

none of these

Amplitude

frequency

Time period

16 / 20

Frequency of silent whistle lies between

20,000 Hz - 35,000 Hz

20,000 Hz - 25,000 Hz

15,000 Hz - 40,000 Hz

20 Hz - 20,000 Hz

17 / 20

Intensity of loudest audible sound is

1 Wm⁻²

10⁻¹² Wm⁻²

20 Wm⁻²

All of these

18 / 20

Voice of Child is _____

Shrill

Loud

Faint

Grave

19 / 20

Pitch of sound depends on

Time period

Displacement

Frequency

Amplitude

20 / 20

Intensity of whispering is ______

10⁻¹² Wm⁻²

10⁻⁸ Wm⁻²

10⁻⁸ Wm⁻²

10⁻⁵ Wm⁻²

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Practice MCQs Test No 2

/20

624

Class 10 Physics

Chapter 11

Practice MCQs Test No 2

1 / 20

The method used to absorb undesirable sound by soft and porous surface is called:

Intensity

Acoustics

Pitch

Echos

2 / 20

We hear sound produce by musical instrument such as

Violin

Harmonic

All of these

Flute

3 / 20

Mice can hear frequencies up to:

45,00 Hz

100,000 Hz

35,00 Hz

35,000 Hz

4 / 20

The speed of sound varies with

None of these

both Temperature and Humidity

Temperature

Humidity

5 / 20

The speed of sound in air at 2 atm pressure and at room temperature (21°C) is

360 ms⁻¹

320 ms⁻¹

343 ms⁻¹

None of these

6 / 20

The speed of sound in solid is _____ than liquid and air.

Smaller

Equal

Greater

None of these

7 / 20

The sensation of sound persists in our brain for about

2 s

0.1 s

1 s

0.01 s

8 / 20

Echo of sound is:

Diffraction

Reflection

Interference

Refraction

9 / 20

Bats can hear frequencies up to ______

10.000 Hz

120,00,000 Hz

120,000 Hz

12.00.000 Hz

10 / 20

The level of noise recommended in most of countries is:

95 - 100 dB

75 - 80 dB

115 - 120 dB

85 - 90 dB

11 / 20

Compressions are places where air is slightly ____________ than the surrounding air.

None of these

Equal

Higher

Less

12 / 20

Such sound which are pleasant to our ears are called _____________

Musical sounds

None of these

Both musical sounds and noise

Noise

13 / 20

Multiple reflections are called

Reverberations

Vibration

All of these

Acoustics

14 / 20

Rarefactions are places where air is slightly _____________ than the surrounding air.

Less

Equal

None of these

Higher

15 / 20

For hearing distinct echoes, the minimum distance of obstacle from source of source of sound must be

38 m

17 m

34 m

16 m

16 / 20

For a normal person audible frequency range for sound wave lie between

25 Hz and 25 kHz

30 Hz and 30 kHz

20 Hz and 20 kHz

10 Hz to 10 kHz

17 / 20

_______ corresponds to irregular and sudden vibrations produced by some sound.

None of these

Noise

Notes of tuning fork

Musical Sound

18 / 20

The speed of sound in air was first accurately measured in

1838

1738

1938

1638

19 / 20

The speed of sound in solid is about _____ times that in gases.

15

5

20

10

20 / 20

Such sounds which are unpleasant to our ears are called:

Both musical sound and noise

Musical Sounds

Noise

None of these

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Practice MCQs Test No 3

/19

550

Class 10 Physics

Chapter 11

Practice MCQs Test No 3

1 / 19

By ultrasonic waves ______ are destroyed.

Fungus

Bacteria

Both Germs and Bacteria

Germs

2 / 19

______  waves carry more energy and higher frequency than sound waves.

All of these

Ultrasonics

Audible sound

Infrasonic

3 / 19

Sound waves with frequency less than 20Hz are called:

Notes

Acoustic

Ultrasonic

Infrasonics

4 / 19

Ultrasound is the frequency of sound higher than

15,000 Hz

20 Hz

25,000 Hz

20 kHz

5 / 19

Noise has negative effects on human health it cause except

High stress level

Aggression

Hyper tension

Fever / flue

6 / 19

Infrasonic is the frequency of sound less than

15,000 Hz

20 Hz

25,000 Hz

20 kHz

7 / 19

Powerful ultrasound is now being used to remove blood clots from:

Arteries

Convoluted tubule

Capillaries

None of these

8 / 19

Which bird fly easily between wires in the black room?

Cow

Parrot

Sparrow

Bat

9 / 19

The range of the frequency which human, ear can hear is called

Ultrasonic waves

Audible frequency range

none of these

Transonic waves

10 / 19

According to wave equation v = fλ the wavelength of ultra sonic waves are:

Very big

Very small

Both very small and big

None of these

11 / 19

When the frequency of a sound wave is increased which of following decreases?

Both Wavelength and Period

Wavelength

Amplitude

Period

12 / 19

Ultrasonics are used to locate under-water depth. This technique is called:

Sonar

Infrasonics

Acoustics

Reverbration

13 / 19

Audible frequency range is

20 Hz - 20 kHz

20 Hz - 15600 Hz

200 Hz - 2000 Hz

15 Hz - 15000 Hz

14 / 19

Old people cannot hear sound even above

15,000 Hz

Both 1.5 kHz and 15,000 Hz

1.5 kHz

20,00 Hz

15 / 19

Ultrasonics are used to measure the depth of water by ______

Sound Level

Diffraction

Acoustics

Echo Method

16 / 19

Bats can hear frequency up to

15,000 Hz

120,000 Hz

2,000 Hz

20,000 Hz

17 / 19

By which waves small cracks can appear:

Infrasonic

Ultrasonics

Sound frequency

NOTSE

18 / 19

Noise corresponds to _____________ vibrations.

Irregular

Slowly slowly

Both Irregular and Sudden

Sudden

19 / 19

Which are the acoustic protection except

Auditorium

Kitchen

Lecture Halls

Theater halls

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