Wave and Sound

08 Wave motion and Sound

Two persons are standing on moon at a distance of 5 meter. "A" sounds few words. to" B". what is the result

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Sound travels fastest in ______

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The human ear can hear two sounds separately only if they reach the ear after an interval of :

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A human ear can hear sound of following frequency:

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Which of the following characteristic of sound is correct.

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What is the speed of sound in air at zero degree Celsius?

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What Is The SI Unit of Sound?

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Different sounds of the same loudness can be distinguished by the difference in their frequencies. The sound produced by an object vibrating with a high frequency is called shrill or high pitched. The sound produced by an object vibrating with a low frequency is described as flat or low-pitched. Among the sound produced by a lion and a mosquito, which will have more frequency?

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Sound having frequencies greater than 20,000 Hz are called:

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A boy is standing near to railway track. He see both side of track. He see no train on either side, however he put ear on railway track and announces train is coming How it is possible?

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You are in closed room. Two persons are knocking and shouting at your door. You can identify both person by their sound. This sound can be differentialed on the basic of following characteristics.

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An object is flying in the air more than the speed of sound. This speed is termed as

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An object is oscillating 75 times in one second. what is the frequency of this object.

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When a drum is beaten, its membrane vibrate to produce the sound, similarly in temple, bell is vibrate to produce sound. In flute, which part of instrument is vibrated to produce the sound?

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The speed of sound do not depend on this factor

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String vibration in sitar produces different sound. If string is stretched and made tense, then its frequency will

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A sitar wire vibrates with frequency of 330 vibrations per second. If its length is increased three times and tension is increased four times then the frequency of the wire will be

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Alka Yagnik is performing at show at New York. One of the audience is sitting in Hall 500 meter away from Alka Yagnik . You are listening the show on T.V at madras approx 10,000 km away from New York. Who will hear Alka Yagnik first

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A radar is able to detect the reflected waves from an enemy aeroplane, after a time interval of 0.02 mili seconds. If the velocity wave is 3*10 to power 8 ms-1, calculate the distance of plane from radar?

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It is raining, the cloud thunders. You find that flash of light comes at once and you hear the sound after few seconds. This is because.

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You are at a top of one hill. Ahead of you is another higher hill. In between you and another hill top is valley. You listen your echo after 4 seconds. what is air distance between you and another hill top.

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To hear a distinct echo, the minimum distance of a reflecting surface should be

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You are sitting in a cloudy night. You see the lightening flash but hear the thunder after 5 seconds. What is approximate distance of cloud from you?

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Question: Sound wave in air is - ( 65th BPSC (pre) 2019 )

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Question: Which of the following is a mechanical wave ? ( Utt PCS (pre) 2016 )

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Question: An example of longitudinal wave is : ( 66th BPSC (pre) (Re. Exam ) 2020 )

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Question: Which of the following electromagnetic radiations has the maximum energy ? ( UP PCS (pre) 2018, UP PCS (mains) 2005 )

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Question: Which of the following has the longest wavelength ? ( RAS/RTS (pre) 1996 )

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Question: The Earth's atmosphere in mainly heated by which one of the following ? ( UP PCS (pre) 2022 )

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Question: Which of the following does not require a medium ? ( UP ARO/RO (mains) 2017 )

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Question: Which one of the following is association with 'Albedo' ? ( UP PCS (pre) 2019 )

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Question: Wave of the Ultra High Frequency (UHF) range normally propagate by means of ( RAS/RTS (pre) 2018)

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Question: What is the distance between two successive crests or successive troughs called ? ( 45th BPSC (pre) 2002 )

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Question: Which waves cannot be transmitted through vacuum ? ( MP PCS (pre) 2000 )

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Question : Cosmic rays- ( 56th to 59th BPSC (pre) 2015 )

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Question: Wireless communication is reflected back to the earth's surface by the- ( UP PCS (pre) 1998 )

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Question: Which one of the following statements is not true about cosmic rays ? ( UP PCS (pre) 2005)

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Question : Long radio waves are reflected by which of the following layer of Earth's surface - ( UP PCS (pre) 1991 )

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Question: Which of the following atmospheric layers is responsible for the deflection of radio waves ? ( UP Lower Sub. (pre) 1998 )

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Question : Assertion (A) : Radio waves bend in a magnetic field. Reason (R) : Radio waves are electromagnetic in nature. ( IAS (pre) 2008 )

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Question: FM broadcasting service uses the range of frequency bands between - ( RAS/RTS (pre) 2013 )

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Question: Which one of the following does a TV remote control unit use to operate a TV set ? ( UP PCS (mains) 2013), (IAS. (pre) 2000 )

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Question: Waves used for telecommunication are - ( UP PCS (mains) 2013 )

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Question: Which type of electromagnetic radiation is used in the remote control of a television ? ( UP PCS (pre) 2013, UP PCS (pre) 2010, UP PCS (pre) 2002 )

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Question: A radar which detects the presence of an enemy aircraft uses : ( Utt PCS (mains) 2002 )

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Question: Remote Sensing uses which of the following in its applications ? ( Utt PCS (pre) 2021)

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Question: Which one of the following is used for determining the structure of crystal : ( RAS/RTS (pre) 1997-98 )

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Question: Microwaves are electromagnetic waves having frequencies in range of- ( MP PCS (pre) 2020)

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Question: Which one of the following types of waves are used in a Night Vision apparatus ? ( IAS (pre) 2009 )

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Question: Which electromagnetic radiation is used in remote control of a television ? ( Jharkhand PCS (pre) 2013 )

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Question: The waves used in common TV remote control are ( RAS/RTS (pre) 2018 )

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Question : What is not true about FM ( Frequency Modulation ) radio waves ? ( Chhattisgarh PCS (pre) 2021 )

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Question: Television viewers using dish antenna to receive satellite signals do not receive signals during rain because : 1. of small size of antenna. 2. rain droplets absorb the energy of radio waves. 3. rain droplets disperse the energy of radio waves from their original direction. Which of the above statements are correct ? ( UP PCS (pre) 2017 )

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Question: A radio station broadcast at 30 metre band. The frequency of the carrier wave transmitted by this station is : - RAS/RTS (pre) 1993 )

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Question: CT Scan is done by using - ( UP PCS (mains) 2011 )

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Question: A layer is the Earth's atmosphere called Ionosphere facilitates radio communication. Why ? 1. The presence of ozone causes the reflection of radio waves to Earth. 2. Radio waves have a very long wavelength. Which of the statements given above is/are correct ? ( IAS (pre) 2011 )

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Question: Which of the following was invented by Wilhelm Rontgen ? ( UP PCS (pre) 2018 )

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Question: A sound wave has frequency of kHz and its wavelength is 35 cm, then how much time will it take to travel a distance of 3 km ? ( Chhattisgarh PCS (pre) 2021 )

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Question: The walls of the hall, built for music concerts should : ( UP PCS (mains) 2007 )

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Question: In which of the following option sound may not be across/travel ? ( UP PCS (pre) 1990 )

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Question: Sound waves travel faster in : ( MP PCS (pre) 2017 )

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Question: To hear a clear echo, the minimum distance between the reflecting surface and the observer should be : ( UP PCS (mains) 2007 )

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Question: How much should minimum distance be between the source of sound and reflecting surface, so that an echo can be heard clearly ? ( RAS/RTS (pre) 2007 )

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Question: sound waves : ( UP PCS (pre) 2002)

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Question: Sound waves do not travel in : ( UP PCS (pre) 2014 )

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Question : The Velocity of sound is maximum in : ( UP Lower (spl) (pre) 2008 )

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Question: The sound will have the highest velocity in : ( UP PCS (pre) 2018 )

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Question : In Stethoscope, the sound of the patient's heartbeat reaches the doctor's ears by : ( RAS/RTS (pre) 2021 )

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Question: Two astronauts cannot hear each other on the Moon's surface, because : ( UPUDA/LDA (pre) 2002 )

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Question: Which of the following rays/waves are used to know the growth of fetus in the womb ? ( 67th BPSC (pre) 2022 )

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Question: What is the audible range (hearing range) of humans ? ( MP PCS (pre) 2018 )

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Question : Bats can fly during dark nights and also prey. This is because : ( UP PCS (mains) 2005 )

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Question: Consider the following statements : 1. The heart vibrates at infrasonic. 2. The speed of sound is more in gas than in liquid and solid. 3. Mach number is used to describe the speed of sound. 4. Ultrasonic sound has frequency more than 20,000 Hz. Of these statements : ( UP PCS (mains) 2002 )

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Question: A biotechnique in which ultrasonic sound is used : ( RAS/RTS (pre) 2012 )

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Question: Ultrasonic are sound waves of frequency : ( UP PCS (pre) 2012 )

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Question: An astronaut cannot hear his companion at the surface of the Moon because : ( UP PCS (mains) 2013 )

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Question: One important characteristic of sound is 'Pitch', which depends upon : ( UP PCS (Mains) 2017 )

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Question: Consider the following statements about ultrasonic waves : 1. They can destroy insects. 2. They can clean clothes by removing dust. 3. They can be used to treat diseases. 4. They can control automatic doors. Of the above statements : ( UP PCS (mains) 2004 )

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Question: Consider the following statements : 1. A flute of smaller length produces waves of lower frequency. 2. Sound travels in rocks in the form of longitudinal elastic waves only. Which of the statements given above is/are correct ? ( IAS (pre) 2007 )

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Question: The optimum sound level for human beings is - ( RAS/RTS (pre) 2012 )

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Question: Which one of the following units is used for measurement of noise pollution ? ( UP PCS (mains) 2017 )

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Question: Decibel is used to measure : ( MP PCS (pre) 2005 )

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Question: What is the decibel level of sound produced by two persons in conversation ? ( RAS/RTS (pre) 2003 )

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Question: Sound above what level (in decibels) is considered hazardous noise pollution ? ( UP PCS (pre) 2013 ), UP PCS (mains) 2008 )

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Question: As per the WHO, the safe noise level for a city is - ( UP PCS (mains) 2010 )

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Question: Which of the following represents the decibel level of rustling of tree leaves in normal circumstance ? ( UP PCS (pre) 2018 )

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Question: A noise level of 100 decibel would correspond to : ( IAS (pre) 2000 )

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Question : Which one of the following is the effect of the flight of supersonic jet ? ( MP PCS (pre) 1993 )

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Question : Decibel unit is used to measure : ( UP PCS (mains) 2011 )

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Question : Assertion (A) : A jet aircraft moving at much number equal to 1 travels faster at an altitude of 15 km than while moving at much number equal to 1 near the sea level. Reason : (R) The velocity of sound depends on the temperature of the surrounding medium. ( IAS (pre) 2007 )

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Question: The tolerable limit of noise for human being is around : ( RAS/RTS (pre) 1993 )

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Question: Loudness of sound is measured in terms of following ? ( UP RO/ARO (mains) 2017 )

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Question: The technique used to transmit audio signals in television broadcast is - ( UP UDA/LDA (spl) (pre) 2010 )

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Question: When T.V. is switched on : ( UP PCS (pre) 2007 )

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Question: The basic units of sound are called ? ( UP PCS (mains) 2017 )

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Question: Consider the following statements : 1. A widely used musical scale called diatonic scale has seven frequencies. 2. The frequency of the tone Sa is 256 Hz and that of Ni is 512 Hz. Which of the statements given above is/are correct ? ( IAS (pre) 2008 )

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Question: When the same tone is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in : ( IAS (pre) 1995 )

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Question: Assertion (A) : Reverberation mainly feels in large churches and in other large buildings. Reason (R) : The walls, roof and ground may cause multiple sound reflections. ( UP Lower Sub. (spl.) (pre) 2003 ), ( UP Lower Sub. (Spl) (pre) 2002 )

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Question: In television broadcast, the picture signals are transmitted by - (RAS/RTS (pre) 2012 )

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Question: Which of the following statements is/are true in relation to sound waves ? Statement I : Speed of sound decreases when we go from solid to gaseous state Statement II : In any medium as we decreases the temperature, the speed of sound increases Statement III : Speed of sound is less in aluminium medium than in glass medium ( Chhattisgarh PCS (pre) 2020 )

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Question: A worker was working on the rail track. A boy at a distance holds his ear near the rail track. This boy was able to hear sound of the blow of workman twice. It is because of : ( RAS/RTS (pre) 1994-95 )

question-a-worker-was-working-on-the-rail-track-a-boy-at-a-distance-holds-his-ear-near-the-rail-track-this-boy-was-able-to-hear-sound-of-the-blow-of-workman-twice-it-is-because-of-ras-rts-pre-1994-95
Question: When a sound wave goes from one medium to another, the quantity that remains unchanged is : ( 66th BPSC (pre) (Re. Exam) 2020 )

question-when-a-sound-wave-goes-from-one-medium-to-another-the-quantity-that-remains-unchanged-is-66th-bpsc-pre-re-exam-2020

Wave and Sound

Two persons are standing on moon at a distance of 5 meter. "A" sounds few words. to" B". what is the result

two-persons-are-standing-on-moon-at-a-distance-of-5-meter-a-sounds-fews-words-to-b-what-is-the-result

Sound travels fastest in ______

sound-travels-fastest-in

The human ear can hear two sounds separately only if they reach the ear after an interval of :

the-human-ear-can-hear-two-sounds-separately-only-if-they-reach-the-ear-after-an-interval-of

A human ear can hear sound of following frequency:

a-human-ear-can-hear-sound-of-following-frequency

Which of the following characteristic of sound is correct.

which-of-the-following-characteristic-of-sound-is-correct

What is the speed of sound in air at zero degree Celsius?

what-is-the-speed-of-sound-in-air

What Is The SI Unit of Sound?

what-is-the-si-unit-of-sound

Sound having frequencies greater than 20,000 Hz are called:

sound-having-frequencies-greater-than-20-000-hz-are-called

A boy is standing near to railway track. He see both side of track. He see no train on either side, however he put ear on railway track and announces train is coming How it is possible?

a-boy-is-standing-near-to-railway-track-he-see-both-side-of-track-he-see-no-train-on-either-side-however-he-put-ear-on-railway-track-and-announces-train-is-coming-how-it-is-possible

You are in closed room. Two persons are knocking and shouting at your door. You can identify both person by their sound. This sound can be differentialed on the basic of following characteristics.

you-are-in-closed-room-two-persons-are-knocking-and-shouting-at-your-door-you-can-identify-both-person-by-their-sound-this-sound-can-be-differentialed-on-the-basic-of-following-characteristics

An object is flying in the air more than the speed of sound. This speed is termed as

an-object-is-flying-in-the-air-more-than-the-speed-of-sound-this-speed-is-fermed-as

An object is oscillating 75 times in one second. what is the frequency of this object.

an-object-is-oscillating-75-times-in-one-second-what-is-the-frequecy-of-this-object

When a drum is beaten, its membrane vibrate to produce the sound, similarly in temple, bell is vibrate to produce sound. In flute, which part of instrument is vibrated to produce the sound?

when-a-drum-is-beaten-its-membrane-vibrate-to-produce-the-sound-similarly-in-temple-bell-is-vibrate-to-produce-sound-in-flute-which-part-of-instrument-is-vibrated-to-produce-the-sound

The speed of sound do not depend on this factor

the-speed-of-sound-do-not-depend-on-this-factor

String vibration in sitar produces different sound. If string is stretched and made tense, then its frequency will

string-vibration-in-sitar-produces-different-sound-if-string-is-streched-and-made-tense-then-its-frequecy-will

A sitar wire vibrates with frequency of 330 vibrations per second. If its length is increased three times and tension is increased four times then the frequency of the wire will be

a-sitar-wire-vibrates-with-frequency-of-330-vibrations-per-second-if-its-length-is-increased-three-times-and-tension-is-increased-four-times-then-the-frequency-of-the-wire-will-be

Alka Yagnik is performing at show at New York. One of the audience is sitting in Hall 500 meter away from Alka Yagnik . You are listening the show on T.V at madras approx 10,000 km away from New York. Who will hear Alka Yagnik first

alka-yagnik-is-performing-at-show-at-new-york-one-of-the-audience-is-sitting-in-hall-500-meter-away-from-alka-yagnik-you-are-listening-the-show-on-t-v-at-madras-approx-10-000-km-away-from-new-york-who-will-hear-alka-yagnik-first

A radar is able to detect the reflected waves from an enemy aeroplane, after a time interval of 0.02 mili seconds. If the velocity wave is 3*10 to power 8 ms-1, calculate the distance of plane from radar?

a-radar-is-able-to-detect-the-reflected-waves-from-an-enemy-aeroplane-after-a-time-interval-of-0-02-mili-seconds-if-the-velocity-wave-is-3-10-to-power-8-ms-1-calculate-the-distance-of-plane-from-radar

It is raining, the cloud thunders. You find that flash of light comes at once and you hear the sound after few seconds. This is because.

it-is-raining-the-cloud-thunders-you-find-that-flash-of-light-comes-at-once-and-you-hear-the-sound-after-few-seconds-this-is-because

You are at a top of one hill. Ahead of you is another higher hill. In between you and another hill top is valley. You listen your echo after 4 seconds. what is air distance between you and another hill top.

you-are-at-a-top-af-one-hill-ahead-of-you-is-another-higher-hill-in-between-you-and-another-hill-top-is-valley-you-listen-your-echo-after-4-seconds-what-is-air-distance-between-you-and-anoher-hill-top

To hear a distinct echo, the minimum distance of a reflecting surface should be

to-hear-a-distinct-echo-the-minimum-distance-of-a-reflecting-surface-should-be

You are sitting in a cloudy night. You see the lightening flash but hear the thunder after 5 seconds. What is approximate distance of cloud from you?

you-are-sitting-in-a-cloudy-night-you-see-the-lightening-flash-but-hear-the-thunder-after-5-seconds-what-is-approximate-distance-of-cloud-from-you

Question: Sound wave in air is - ( 65th BPSC (pre) 2019 )

question-sound-wave-in-air-is-65th-bpsc-pre-2019

Question: Which of the following is a mechanical wave ? ( Utt PCS (pre) 2016 )

question-which-of-the-following-is-a-mechanical-wave-utt-pcs-pre-2016

Question: An example of longitudinal wave is : ( 66th BPSC (pre) (Re. Exam ) 2020 )

question-an-example-of-longitudinal-wave-is-66th-bpsc-pre-re-exam-2020

Question: Which of the following electromagnetic radiations has the maximum energy ? ( UP PCS (pre) 2018, UP PCS (mains) 2005 )

question-which-of-the-following-electromagnetic-radiations-has-the-maximum-energy-up-pcs-pre-2018-up-pcs-mains-2005

Question: Which of the following has the longest wavelength ? ( RAS/RTS (pre) 1996 )

question-which-of-the-following-has-the-longest-wavelength-ras-rts-pre-1996

Question: The Earth's atmosphere in mainly heated by which one of the following ? ( UP PCS (pre) 2022 )

question-the-earth-s-atmosphere-in-mainly-heated-by-which-one-of-the-following-up-pcs-pre-2022

Question: Which of the following does not require a medium ? ( UP ARO/RO (mains) 2017 )

question-which-of-the-following-does-not-require-a-medium-up-aro-ro-mains-2017

Question

question

Question:

question

Question: Which one of the following is association with 'Albedo' ? ( UP PCS (pre) 2019 )

question-which-one-of-the-following-is-association-with-albedo-up-pcs-pre-2019

Question: Wave of the Ultra High Frequency (UHF) range normally propagate by means of ( RAS/RTS (pre) 2018)

question-wave-of-the-ultra-high-frequency-uhf-range-normally-propagate-by-means-of-ras-rts-pre-2018

Question: What is the distance between two successive crests or successive troughs called ? ( 45th BPSC (pre) 2002 )

question-what-is-the-distance-between-two-successive-crests-or-successive-troughs-called-45th-bpsc-pre-2002

Question: Which waves cannot be transmitted through vacuum ? ( MP PCS (pre) 2000 )

question-which-waves-cannot-be-transmitted-through-vacuum-mp-pcs-pre-2000

Question : Cosmic rays- ( 56th to 59th BPSC (pre) 2015 )

question-cosmic-rays-56th-to-59th-bpsc-pre-2015

Question: Wireless communication is reflected back to the earth's surface by the- ( UP PCS (pre) 1998 )

question-wireless-communication-is-reflected-back-to-the-earth-s-surface-by-the-up-pcs-pre-1998

Question: Which one of the following statements is not true about cosmic rays ? ( UP PCS (pre) 2005)

question-which-one-of-the-following-statements-is-not-true-about-cosmic-rays-up-pcs-pre-2005

Question : Long radio waves are reflected by which of the following layer of Earth's surface - ( UP PCS (pre) 1991 )

question-long-radio-waves-are-reflected-by-which-of-the-following-layer-of-earth-s-surface-up-pcs-pre-1991

Question: Which of the following atmospheric layers is responsible for the deflection of radio waves ? ( UP Lower Sub. (pre) 1998 )