Tag: amplitude, time period and frequency of a vibration

Quizzes (0) Questions (51)

Questions Related to amplitude, time period and frequency of a vibration

Multiple choice physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

The difference of sound level between two point is $30$ decibel. The ratio of pressure amplitude between points is : 

  1. $10$

  2. $20$

  3. $30$

  4. $32$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The sound level difference in dB is 20 * log10(P2/P1) for pressure amplitude. Given 30 dB = 20 * log10(ratio), then log10(ratio) = 1.5, so the ratio is 10^1.5, which is approximately 31.62, rounding to 32.

Multiple choice physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

The pitch of the sound produced by a stretched string gets higher as the tension .....................

  1. Increases

  2. decrease

  3. same

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

Pitch depends on string length and string tension.

  1. If the string's mass per unit length remains constant, for longer string, high tension will produce high pitch.
  2. If the string's length remains constant, for heavier string, the higher the tension will generate higher pitch.

Multiple choice physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

The pitch of sound increases if its frequency

  1. increases

  2. decreases

  3. remains same

  4. cant say
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pitch of sound increases if its frequency increases. 
Pitch describes how high or low a tone is and depends upon the rapidity with which a sounding body vibrates, i.e., upon the frequency of vibration. The higher the frequency of vibration, the higher the pitch.

Multiple choice physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

Sound wave P has a greater amplitude and a larger wavelength in air than sound wave Q. How do the loudness and pitch of P compare with the loudness and pitch of Q?
How do the loudness and pitch of P compare with the loudness and pitch of Q?

  1. P is louder and higher in pitch than Q

  2. P is louder and lower in pitch than Q

  3. P is quieter and higher in pitch than Q

  4. P is quieter and lower in pitch than Q
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
We know that pitch $\propto$ frequency.
wavelength of P $>$  wavelength of Q
$\implies$ frequency of P $<$ frequency of Q
$\implies $ pitch of P $<$  pitch of Q
now ,
loudness $\propto $ amplitude
So, P has more loudness as compared to Q.
Multiple choice physics sound time period, frequency and amplitude of sound amplitude, time period and frequency of a vibration nature and characteristics of sound waves

The sound produced by an object vibrating with a high frequency is called _____________ .

  1. shrill or high-pitched sound

  2. deep or low-pitched sound

  3. heavy sound

  4. musical sound
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The frequency determines the shrillness or pitch of a sound. If the frequency of vibration is higher, we say that the sound is shrill and has a higher pitch. If the frequency of vibration is lower, then we say that the sound has low pitch.