Frequency

Q.

What is frequency of a sound wave?

1. Number of oscillations per unit time.

2. Distance between two oscillations.

3. Time gap between two peaks.

4. Time gap between two oscillations.

Q. 1 hertz is equal to:

1. 1 oscillation per minute
2. 60 oscillations per minute
3. 60 oscillations per second
4. 30 oscillations per minute

Q. Why do we don't hear sound below 20Hz and above 20, 000Hz?

Q. the resonance tube is resonated with tuning fork of frequency 256 Hz.If the length of first and second resonating air columns are 32 cm and 100cm, then how much will be end correction

Q. The number of compressions or rarefactions per unit time is calledof a sound wave.

1. pitch
2. wavelength
3. frequency

Q.

Doubling the frequency of a wave source, doubles the speed of the wave.

1. True

2. False

Q.

The total number of compressions and rarefactions produced per second in a sound wave is 50. The frequency of the sound wave is ___.

1. 50

2. 60

3. 100

4. 55

Q.

HELLO SIR,

What is the time period of an object which it oscillates 120 times in a minute?

thank you

Khushi

Q. _______ is the number of waves that pass a certain point in a specific time.

1. Wavelength
2. Frequency
3. Pitch
4. Amplitude

Q.

What do you mean by frequency of a sound wave?

Q.

Name the receptor associated with

Hearing

Q.

The displacement-time graph for a particle in a wave is shown below. The frequency of the wave is 10 Hz.

1. True

2. False

Q. Which of the following frequency is inaudible to human being?

1. 40KHz
2. 15KHz
3. 50Hz
4. 1KHz

Q.

The audible range of hearing for human being is:

1. 10 Hz to 20, 000 Hz

2. 20 Hz to 10, 000 Hz

3. 20 Hz to 20, 000 Hz

4. 20 Hz to 2000 Hz

Q. The sound from a mosquito is produced when it vibrates its wings at an average rate of 500 vibrations per second. What is the time period of the vibration? [2 MARKS]

Q.

What is a unit of frequency?

Q.

What is the wave velocity formula?

Q.

A sound produced by the mixture of several frequencies is called

1. Tone

2. Note

3. Echo

4. Pitch

Q.

A sound wave has a time period of $0.5s$. What is the frequency of the wave?

1. $16Hz$

2. $9Hz$

3. $2Hz$

4. $12Hz$

Q. Frequency of oscillation _______.

1. increases with increase in time period of oscillation
2. decreases with increase in time period of oscillation
3. equal to time period of oscillation
4. not related to time period of oscillation

Q.

A sound wave having a wavelength of 2 cm is travelling in water. If the velocity of sound in water is $1600m{s}^{-1}$, find the frequency of the sound wave.

1. 80000 Hz

2. 7000 Hz

3. 16000 Hz

4. 90000 Hz

Q.

Can we hear sound waves having frequency hundred thousands Hz

Q. A sound wave goes from medium A to medium B. What can you say about its frequency in both the mediums?

1. Frequency in A > Frequency in B
2. Insufficient data
3. Frequency in A < Frequency in B
4. Frequency in A = Frequency in B

Q.

Why is the womans voice shriller than that of a man?

Q.

What are audible and inaudible sounds? What is the audibility frequency range for human ear?
[3 MARKS]

Q.

Dolphins communicate under water using sound. What is the name of that sound?

Q. If a flute player playa a note with all holes covered, will it be a high pitch or low pitch? Please explain the concept.

Q. Which of the following sound waves has the highest pitch?

1. 
2. 
3. 
4. 

Q. Number of cycles of compression and rarefaction produced in a medium per second is called ___.

1. amplitude
2. velocity
3. frequency
4. wavelength

Q.

The number of oscillations per second is called the Time Peroid of oscillation

1. True

2. False