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

286

Class 10 Physics

Chapter 11

Practice MCQs Test No 1

1 / 20

Sound can travel only in presence of

Both Medium and Air

Air

vacuum

Medium

2 / 20

The amplitude of 100 dB sound is:

1000

100,000

1001000

10,000

3 / 20

Voice of Child is _____

Loud

Grave

Faint

Shrill

4 / 20

Intensity of loudest audible sound is

10⁻¹² Wm⁻²

1 Wm⁻²

20 Wm⁻²

All of these

5 / 20

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

Oscilloscope

Gastroscope

Stroboscope

Electroscope

6 / 20

1 bell is equal to

50 dB

20 dB

100 dB

10 dB

7 / 20

Intensity is a _____ quantity.

Scalar

Vector

Physical quantity

none of these

8 / 20

Intensity of faintest sound is

10⁻⁸ Wm⁻²

10¹² Wm⁻²

10⁻⁹ Wm⁻²

10⁻¹² Wm⁻²

9 / 20

Intensity of whispering is ______

10⁻⁸ Wm⁻²

10⁻⁸ Wm⁻²

10⁻¹² Wm⁻²

10⁻⁵ Wm⁻²

10 / 20

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

Intensity

loudness

Pitch

Quality

11 / 20

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

Weber Fechner Law

Law of Gravitation

Echo

Intensity Level

12 / 20

Pitch of sound depends on

Frequency

Displacement

Amplitude

Time period

13 / 20

Sound is ___________ Wave

Electromagnetic

None of these

Transverse

Longitudinal

14 / 20

The study of sound is called

Electrostatics

Acoustic

All of these

Optics

15 / 20

Frequency of silent whistle lies between

20 Hz - 20,000 Hz

15,000 Hz - 40,000 Hz

20,000 Hz - 35,000 Hz

20,000 Hz - 25,000 Hz

16 / 20

The intensity of sound depends on the _________ of sound.

Time period

Amplitude

none of these

frequency

17 / 20

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

Intensity of sound

Loudness

Pitch

Quality

18 / 20

Loudness of sound depends on

Distance of vibrating body

All of these

Amplitude of vibrating body

Area of vibrating body

19 / 20

Sound is produced by

None of these

Vibration

Propagation

Both of these

20 / 20

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

Amplitude

none of these

Frequency

Wave length

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Practice MCQs Test No 2

/20

186

Class 10 Physics

Chapter 11

Practice MCQs Test No 2

1 / 20

Such sounds which are unpleasant to our ears are called:

None of these

Both musical sound and noise

Musical Sounds

Noise

2 / 20

We hear sound produce by musical instrument such as

Flute

Violin

All of these

Harmonic

3 / 20

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

20

10

5

15

4 / 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

5 / 20

The level of noise recommended in most of countries is:

75 - 80 dB

95 - 100 dB

85 - 90 dB

115 - 120 dB

6 / 20

Echo of sound is:

Reflection

Refraction

Diffraction

Interference

7 / 20

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

38 m

34 m

17 m

16 m

8 / 20

The speed of sound in air was first accurately measured in

1738

1938

1638

1838

9 / 20

Such sound which are pleasant to our ears are called _____________

Both musical sounds and noise

Musical sounds

None of these

Noise

10 / 20

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

Less

Equal

Higher

None of these

11 / 20

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

10 Hz to 10 kHz

20 Hz and 20 kHz

30 Hz and 30 kHz

25 Hz and 25 kHz

12 / 20

The sensation of sound persists in our brain for about

2 s

0.1 s

1 s

0.01 s

13 / 20

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

None of these

Less

Equal

Higher

14 / 20

Mice can hear frequencies up to:

35,000 Hz

100,000 Hz

35,00 Hz

45,00 Hz

15 / 20

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

Acoustics

Echos

Intensity

Pitch

16 / 20

Bats can hear frequencies up to ______

10.000 Hz

120,00,000 Hz

12.00.000 Hz

120,000 Hz

17 / 20

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

Notes of tuning fork

Noise

None of these

Musical Sound

18 / 20

Multiple reflections are called

Vibration

Acoustics

All of these

Reverberations

19 / 20

The speed of sound varies with

Temperature

None of these

Humidity

both Temperature and Humidity

20 / 20

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

Smaller

Greater

Equal

None of these

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Practice MCQs Test No 3

/19

156

Class 10 Physics

Chapter 11

Practice MCQs Test No 3

1 / 19

Infrasonic is the frequency of sound less than

15,000 Hz

25,000 Hz

20 kHz

20 Hz

2 / 19

Noise has negative effects on human health it cause except

Hyper tension

High stress level

Aggression

Fever / flue

3 / 19

Ultrasound is the frequency of sound higher than

20 kHz

20 Hz

15,000 Hz

25,000 Hz

4 / 19

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

Transonic waves

Audible frequency range

none of these

Ultrasonic waves

5 / 19

Bats can hear frequency up to

20,000 Hz

2,000 Hz

15,000 Hz

120,000 Hz

6 / 19

Which are the acoustic protection except

Theater halls

Kitchen

Lecture Halls

Auditorium

7 / 19

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

Convoluted tubule

Capillaries

Arteries

None of these

8 / 19

Noise corresponds to _____________ vibrations.

Both Irregular and Sudden

Slowly slowly

Sudden

Irregular

9 / 19

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

Both very small and big

Very big

None of these

Very small

10 / 19

Audible frequency range is

200 Hz - 2000 Hz

15 Hz - 15000 Hz

20 Hz - 15600 Hz

20 Hz - 20 kHz

11 / 19

Ultrasonics are used to measure the depth of water by ______

Diffraction

Sound Level

Acoustics

Echo Method

12 / 19

By which waves small cracks can appear:

NOTSE

Sound frequency

Infrasonic

Ultrasonics

13 / 19

Which bird fly easily between wires in the black room?

Bat

Cow

Parrot

Sparrow

14 / 19

By ultrasonic waves ______ are destroyed.

Bacteria

Fungus

Both Germs and Bacteria

Germs

15 / 19

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

Ultrasonics

Audible sound

Infrasonic

All of these

16 / 19

Sound waves with frequency less than 20Hz are called:

Ultrasonic

Acoustic

Infrasonics

Notes

17 / 19

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

Sonar

Acoustics

Infrasonics

Reverbration

18 / 19

Old people cannot hear sound even above

15,000 Hz

20,00 Hz

1.5 kHz

Both 1.5 kHz and 15,000 Hz

19 / 19

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

Amplitude

Both Wavelength and Period

Period

Wavelength

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