Question 1.
Lightning heats the surrounding air to
A. 300 deg Cent
B. 3000 deg Cent
C. 30000 deg Cent
D. 300000 deg Cent
Ans: C. 30000 deg Cent
Question 2.
The number of waves per second in a sound is called __ of that sound.
A. Velocity
B. Frequency
C. Displacement
D. Acceleration
Ans: B. Frequency
Question 3.
Which is best used as a sound absorbing material in partition walls ?
A. Stone chips
B. Steel
C. Glass – wool
D. Glass pieces
Ans: C. Glass – wool
Question 4.
Sound following a flash of lightning is called
A. Stoning
B. Bolting
C. Thunder
D. Cloud clash
Ans: C. Thunder
Question 5.
Which of the following is not an intrusive igneous body?
A. Stock
B. Dike
C. Stope
D. Batholith
Ans: C. Stope
Question 6.
Sound waves do not show the phenomenon of
A. Refraction
B. Interference
C. Diffraction
D. Polarisation
Ans: D. Polarisation
Question 7.
Speed of sound is the greatest in :
A. Water
B. Air
C. Glass
D. Glycerine
Ans: C. Glass
Question 8.
Acceptable noise level for human ear
A. > 85 db
B. = 85 db
C. < 85 db
D. None of the above
Ans: C. < 85 db
Question 9.
The instrument for measuring intensity of earthquakes is called
A. Ediograph
B. Pantagraph
C. Ergograph
D. Seismograph
Ans: D. Seismograph
Question 10.
Speed of sound is maximum in which among the following?
A. Gases
B. Vaccum
C. Liquids
D. Solids
Ans: D. Solids
Question 11.
The pitch of sound depends on its
A. Frequency
B. Intensity
C. Velocity
D. Amplitude
Ans: A. Frequency
Question 12.
Decibel is a term connected with :
A. Air
B. Water
C. Sound
D. Soil
Ans: C. Sound
Question 13.
An instrument that records earthquakes is
A. Ergograph
B. Ediograph
C. Thermograph
D. Seismograph
Ans: D. Seismograph
Question 14.
The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
A. The ringing is not loud enough
B. The glass of the bell jar absorbs the sound waves
C. The bell jar is too small
D. There is no air or any other gas in the bell jar
Ans: D. There is no air or any other gas in the bell jar
Question 15.
What apparatus is used to locate a submerged object?
A. Radar
B. Sonar
C. Quasar
D. Pulsar
Ans: B. Sonar
Question 16.
Decibel is the unit used for
A. Speed of light
B. Intensity of heat
C. Intensity of sound
D. Radio wave frequency
Ans: C. Intensity of sound
Question 17.
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor
A. Should be made of a good conductor but can be of any shape
B. Should be in the form of a vertical rod
C. Can be of any shape
D. Should be made of a good conductor like copper with sharp-pointed edges
Ans: D. Should be made of a good conductor like copper with sharp-pointed edges
Question 18.
What is the full form of “RADAR” ?
A. Radio Detecting and Ranging
B. Region Device and Ranging
C. Radio Detect and Rangs
D. Radio Device and Ranging
Ans: A. Radio Detecting and Ranging
Question 19.
A decibel is
A. A musical instrument
B. The wavelength of noise
C. A musical note
D. A measure of sound level
Ans: D. A measure of sound level
Question 20.
The speed of sound in air depends on
A. Frequency
B. Temperature
C. Wavelength
D. None of the Above
Ans: B. Temperature
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
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- Physics MCQs Set-11
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- Physics MCQs Set-13
- Physics MCQs Set-14
- Physics MCQs Set-15
- Physics MCQs Set-16
- Physics MCQs Set-17
- Physics MCQs Set-18
- Physics MCQs Set-19
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- Physics MCQs Set-22
- Physics MCQs Set-23
- Physics MCQs Set-24
- Physics MCQs Set-25
- Physics MCQs Set-26
- Physics MCQs Set-27
- Physics MCQs Set-28
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- Physics MCQs Set-30
- Physics MCQs Set-31
- Physics MCQs Set-32
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- Physics MCQs Set-48
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- Physics MCQs Set-51
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- Physics MCQs Set-57
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- Physics MCQs Set-59
- Physics MCQs Set-60
- Physics MCQs Set-61
- Physics MCQs Set-62
- Physics MCQs Set-63
- Physics MCQs Set-64
- Physics MCQs Set-65
- Physics MCQs Set-66
- Physics MCQs Set-67
- Physics MCQs Set-68
- Physics MCQs Set-69
- Physics MCQs Set-70
- Physics MCQs Set-71
- Physics MCQs Set-72
- Physics MCQs Set-73
- Physics MCQs Set-74
- Physics MCQs Set-75
- Physics MCQs Set-76
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