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Physics 10 Chapter 11 - Sound - 28
1.
For a normal person, audible frequency range for sound lies between.....................?
a) 20 Hz - 20 kHz
b) 10 Hz - 10 kHz
c) 30 Hz - 30 kHz
d) 25 Hz - 25 kHz
2.
What is the peak frequency that old people can hear?
a) 15,000 Hz
b) 15 Hz
c) 15000 Hz
d) 1500 Hz
3.
What is the range of frequencies called which a human ear can hear?
a) Inaudible frequency range
b) Audible frequency range
c) Audible hearing range
d) Inaudible hearing range
4.
What are the sounds of frequencies higher than 20,000 Hz called?
a) Infrasonic
b) Ultrasounds
c) Infrasound
d) None of these
5.
What are the sounds of frequencies higher than 20,000 Hz called?
a) Infrasonic
b) None of these
c) Infrasound
d) Ultrasonic
6.
The wavelength of ultrasonic waves is.......................?
a) Large
b) Very large
c) Very small
d) Small
7.
Which of the following waves are very useful for detecting very small objects?
a) Infrasonic waves
b) Heat waves
c) Ultrasonic waves
d) Infrasound waves
8.
Which of the following are the uses of ultrasonic?
a) Ultrasonic is very useful for detecting very small objects
b) Ultrasonic are utilized in medical fields
c) Ultrasonic are utilized in technical fields
d) All of these
9.
In medical fields, what is the use of ultrasonic waves?
a) To see the shape and the size of the object
b) To locate objects lying deep on the ocean floor
c) To diagnose different ailments
d) To locate underwater depths
10.
With which of the following, audible frequency range decreases?
a) Age
b) Diet
c) None of these
d) Time
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