Question

1.Sound is a kind of
(a) work
(b) energy
(c) force
(d) pressure

2.The hearing range of human ear is
(a) 20 Hz to 20,000 Hz
(b) less than 20 Hz
(c) more than 20,000 Hz
(d) 20 Hz to 25,000 Hz

3.Pitch of sound is determined by its
(a) frequency
(b) speed
(c) amplitude
(d) loudness

1 hertz is equal to
(a) 1 vibration per minute
(b) 10 vibrations per minute
(c) 60 vibrations per minute
(d) 600 vibrations per minute

4.1 hertz is equal to
(a) 1 vibration per minute
(b) 10 vibrations per minute
(c) 60 vibrations per minute
(d) 600 vibrations per minute

5.Sound cannot travel through
(a) air
(b) water
(c) air
(d) vacuum

The number of vibrations made by a vibrating body in one second is
(a) frequency
(b) noise
(c) loudness
(d) pitch

The maximum displacement of a body from its mean position is called
(a) amplitude
(b) oscillation
(c) periodic motion
(d) frequency

Sound is produced by
(a) Non-Vibrating objects only
(b) Vibrating and non- vibrating objects
(c) Vibration has no relation to sound
(d) Vibrating objects only

Vibration is also known as
(a) Vibratory motion
(b) Translatory motion
(c) Oscillatory motion
(d) None of these

Frequency is expressed in
(a) Kilometer
(b) Hertz
(c) gram
(d) Degree centigrade

The number of oscillations per second is called
(a) Amplitude of oscillation
(b) Pitch of oscillation
(c) Frequency of oscillation
(d) None of the above

When the amplitude of vibration is large, sound produced is
(a) No sound
(b) feeble
(c) loud
(d) No relation between amplitude and sound

Human can hear sound in the range of
(a) 200-2000 Hz
(b) 20-20,000 Hz
(c) 2-20000 Hz
(d) 2000-200000 Hz

Sound of frequency lower than 20 Hz is called the __________.

Sounds which are unpleasant to the ear is called __________.

Too much noise in our surroundings that causes discomfort is called __________.

Answer 1

Answer:

Explanation:human can hear sound to 20Hz to 20000Hz

Answer 2

Answer:

1 energy

2 20 hz to 20000hz

3 frequency

4 a 60 vibration per minute.

b 60 vibration per minute.

5 vacuum

6 frequency

7 amplitude

8 Vibrating objects only

9 Oscillatory motion

10 Hertz

11 frequency of oscillation

12 feeble

13 20-20000 Hz.

14 Infrasound

15 noise

16 noise pollution.