Tag: time period, frequency and amplitude of sound

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Questions Related to time period, frequency and amplitude of sound

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

If the tension in a stretched string is quadrupled, find the change in the fundamental frequency of the transverse wave that can be created in the stretched string.

  1. thrice the original frequency

  2. 1/2 (original frequency)

  3. original frequency

  4. twice the original frequency
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

The average speed of the to bob of a seconds pendulum is $2 {ms}^{-1}$. Determine the frequency of oscillation.

  1. 0.5 Hz

  2. 1.5 Hz

  3. 0.9 Hz

  4. 2 Hz
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

For a pendulum, average speed = total distance / total time. In one oscillation, the bob travels 4A distance in time T. Average speed = 4A / T = 4Af. Given average speed = 2 m/s and length of a seconds pendulum is 1m (T=2s), we find the frequency.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Which of the following sounds have the highest frequency?
a) A man shouting.
b) The sound of a whistle.
c) A lion's roar.
d) The sound of a drum.

  1. a

  2. b

  3. c

  4. d
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Low frequency sounds are low pitched like that of a man shouting, a lion's roar, sound of a drum, etc.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Fill in the blank.

Shrillness : ______: : Loudness : Amplitude

  1. Pitch

  2. Speed

  3. Frequency

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The loudness of sound is determined by the amplitude of sound since amplitude is merely the magnitude of sound. Similarly, the shrillness or pitch of a sound is determined by frequency and it is directly proportional to frequency.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Which are the most important properties of sound?

  1. Amplitude

  2. Frequency

  3. Loudness

  4. <span>Both A and B</span>
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The two most important properties of sound are amplitude and frequency because amplitude determines the loudness of sound and frequency determines its pitch. The loudness and pitch affect the quality of sound.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

How does a sound making object differ from one that is silent?

  1. sound making objects vibrate

  2. sound making objects oscillates

  3. sound making objects shows up and down motion

  4. none
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sound making object can vibrate easily.a vibrating body produces sound when a body vibrates, then the particles of the medium around the object are set into vibrations.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.

  1. when a table is striked lightly, vibrations are produced with less amplitude.

  2. when the table is strikes hard, the amplitude is high.

  3. both A and B

  4. none
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If we strike a table lightly the vibrations produced have less amplitude than when we strike the table hard. Since loudness depends on amplitude, soft sound is heard when we strike lightly.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Hertz stands for number of oscillations per:

  1. Second

  2. Minute

  3. Hour

  4. Milli second
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hz is the SI unit of frequency which is defined as wave cycles per unit time..  Since SI unit of time is second. Hz is number of wave cycles per second.

So the answer is A.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

A sound wave has a frequency of $10$kHz and wavelength $3$mm. How much time will it take to travel $3$ metre?

  1. $0.1$ sec

  2. $1$ sec

  3. $10$ sec

  4. $0.01$ sec
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$V=f\times \lambda$
$=10\times 10^3\times 3\times 10^{-3}=30$
$t=\displaystyle\frac{d}{v}=\frac{3}{30}=0.1$sec.

Multiple choice physics sound: production of sound oscillation - amplitude, time period and frequency of oscillation time period, frequency and amplitude of sound oscillatory and periodic motion

Frequency of vibration of a particle is 10 Hz. If the amplitude of vibration is doubled, what will be the change in frequency of vibration

  1. frequency doubles

  2. frequency becomes halved

  3. frequency remains same

  4. frequency quadruples
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Frequency is a characteristic of source and does not change with amplitude of the wave

The correct option is (c)