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Tancet study material : Physics

By : Engineer
On : 05:45
Tancet sample papers: Physics sample questions and answers

A sound that is produced by a pure sine vibrations is called a
1)    Overtone
2)    Tone
3)    Note
4)    Musical sound
Ans: Tone

The branch of physics that deals with design, generation, direction and propagation of sound waves is called
1)    Ultra sound
2)    Acoustics
3)    Audible sound
4)    Infra-sound
Ans: Acoustics

Loudness (L) produces is directly proportional is directly proportional to logarithm of intensity of sound is called
1)    Newton’s law
2)    Weber-fechner law
3)    Sabine’s law
4)    Graham bell’s law
Ans: weber-fechner law

The study of sound waves in closed rooms is called
1)    Musical acoustics
2)    Engineering acoustics
3)    Architectural acoustics
4)    Bio acoustics
Ans: Architectural acoustics

The amount of sound energy flowing per unit area held normally at the point to the direction of the propagation of sound waves
1)    Loudness
2)    Intensity of sound
3)    Quality
4)    Pitch
Ans: intensity of the sound

The sound waves of frequencies below 20 Hz is called
1)    Ultrasonics
2)    Infrasonics
3)    Audible sound
4)    Inaudiable sound
Ans: Infrasonics

 As the temperature increases the frequency of a tuning force……….
1)    Decreases
2)    Increases
3)    Remains the same
4)    None of these
Ans: Decreases

The sound waves having frequency between 20 Hz and 20 kHz are said to be
1)    Quality
2)    Intensity of sound
3)    Audible sound
4)    In-audible sound
Ans: Audible sound

Which is the most important factor which helps to recognize a person by his voice alone?
1)    Pitch
2)    Intensity
3)    Quality
4)    Loudness
Ans: Pitch

The characteristic of sound that distinguishes between a shrill sound and a grave sound is called
1)    Quality
2)    Intensity of sound
3)    Pitch
4)    Loudness
Ans: Quality

The voice of an old man has low pitch because
1)    The frequency of sound is low
2)    The loudness of sound is high
3)    The frequency of sound is high
4)    The loudness of sound is low
Ans: The frequency of the sound is low

The frequency of the male voice is …….
1)    Greater than female voice
2)    Less than female voice
3)    Equal to the female voice
4)    Double than female voice
Ans: less than female voice

Sound waves cannot be ………..
1)    Reflected
2)    Refracted
3)    Polarized
4)    Diffracted
Ans: polarized

The time reverberation can be reduced by …………….
1)    Opening all windows and doors
2)    Speaking around
3)    Using a number of loudspeaker
4)    Choosing a bigger hall
Ans: opening all windows and doors

The sensitiveness of the human ear decreases with …………..
1)    Increase in the intensity of the sound
2)    Decrease In the intensity of the sound
3)    Equal to the intensity of the sound
4)     Equal to the pitch of the sound
Ans: increase in the intensity of the sound

The sensation of sound persists in our brain for about
1)    0.6 sec
2)    0.2 sec
3)    0.05 sec
4)    0.1 sec
Ans: 0.1 sec

The intensity of sound waves is measured in …………..
1)    Sabine m^-2
2)    Watt
3)    Watt/m^2
4)    Watt m
Ans: watt/m^2

Velocity of the sound is ………………..
1)    Independent of the temperature
2)    Directly proportional to the absolute temperature
3)    Inversely proportional to the absolute temperature
4)    None of these
Ans: none of these

The ratio of the body to the velocity of the sound ………
1)    Lapse number
2)    Neutral number
3)    Natural number
4)    Mach number
Ans: Mach number

The time duration for which a sound persists even after the source of the sound is cut off is called
1)    Reverberation time
2)    Standard reverberation time
3)    Decibel
4)    Bel
Ans: Reverberation time

The number of vibrations made by a vibrating body in one second is called …………
1)    Sound intensity level (β)
2)    Reverberation
3)    Loudness
4)    Pitch
Ans: Frequency

When the frequency of wave motion is doubled without changing the amplitude the intensity of the new wave motion compared to the old wave will be in the ratio
1)    1:1
2)    1:2
3)    1:3
4)    1:4
Ans: 1:4

 When two sounds differ by 30dB, the louder one is more intense then the other by ………..
1) 100 times
2) 1000 times
3)  10 times
4) 10000 times
Ans: 1000 times

The ratio of velocity of sound in air at 4 atmospheres and that at one 1 atmosphere pressure would be
1)    1:1
2)    4:1
3)    1:4
4)    3:1
Ans: 1:1

Who derived a relation for the standard reverberation time …………
1)    Maxwell
2)    Sabine
3)    Weber- fechnes
4)    Doppler
Ans: sabine

The periodic waxing and waning of the resultant sound is called ………….
1)    Echo
2)    Beats
3)    Focusing
4)    Echelon effect
Ans: beats

Echoes can be avoided by …………….
1)    Not proving structures like stair case( or) set of railings
2)    Ceilings should be a low as possible
3)    Covering walls and ceiling with suitable sound absorbing materials
4)    Use of good quality loud speakers is essential
Ans: covering walls and ceiling with suitable sound absorbing materials

Beats are heard for maximum frequency difference of
1)1000 Hz
2) 100 Hz
3) 10 Hz
4) 50 Hz
Ans: 10 Hz

The Doppler Effect takes place when ………………
1)    A sound source is moving only
2)    A sound source is steady only
3)    Both the sound source and hearing person are moving
4)    A sound source is steady and a hearing person is moving
Ans: A sound source is steady only

The audible frequency range is ……………………
1)    Below 20 Hz
2)    Above 20,000 Hz
3)    Between 20 and 20,000 Hz
4)    Above 70,000 Hz
Ans: Between 20 and 20,000 Hz

The reflected sound is called …………………..
1)    Echo
2)    Resonance
3)    Echelon effect
4)    Focusing effect
Ans: Echo

The forced vibration are …………………….
1)    The vibrations produced in a piano string after being stuck
2)    The sound produced in an open organ pipe
3)    The vibration produced in a telephone transmitter during conversation
4)    The sound produced in flute
Ans: the vibrations produced in a piano string being stuck

No sound can be heard in ……………..
1)    Water
2)    Copper wire
3)    Air
4)    Complete vacuum
Ans: complete vacuum

Sound waves in air are ……………
1)    Transverse
2)    Longitudinal stationary
3)    Neither longitudinal nor transverse waves
4)    Stationary
Ans: longitudinal stationary

 The distance between the two nearest particles in the same phase is …………….
1)    Frequency
2)    Wave length
3)    Displacement
4)    None of these
Ans: wave length


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