Propogation Of Sound Waves Exercise 8b
Please Select
Q1 What do you mean by the audible range of frequency
Solution :
Q2 What is the audible range of frequency for humans
Solution :
Q3 For which range of frequencies, human ears are most sensitive?
Solution :
Q4 Which has the higher frequency – ultrasonic sound or infrasonic sound
Solution :
Q5 (a) An average person can hear sound of frequencies in the range ___________ to ___
(b) Ultrasound is of frequency ____________
(c) Infrasonic sound is of frequency ___________
(d) Bats can produce and hear ___________ sound
(e) Elephants produce ____________ sound
Solution :
Q6 Name the sounds of the frequencies given below:
(a) 10 Hz
(b) 100 Hz
(c) 1000 Hz
(d) 40 kHz
Solution :
Q7 Can you hear the sound produced due to vibrations of a seconds’ pendulum? Give reason
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Q8 What is ultrasound?
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Q9 State the approximate speed of ultrasound in air
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Q10 State two properties of ultrasound that make it useful to us
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Q11 Explain how do bats locate the obstacles and prey in their way.
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Q12 State two applications of ultrasound
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Multiple Choice Questions
Q1 A man can hear the sound of frequency:
(a) 1 Hz
(b) 1000 Hz
(c) 200 kHz
(d) 5 MHz
Solution :
Q2 The properties of ultrasound that make it useful, are:
(a) High power and high school
(b) High power and good directivity
(c) High frequency and high speed
(d) High frequency and bending around the objects
Solution :
Q3 Sonar makes use of:
(a) Infrasonic sound
(b) Ultrasound
(c) Ordinary sound
(d) Light
Solution :
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