Audible range

Q. The frequency of vibration of string is given by f=p/2l(F/m)1/2.Here p is number of segment in the string and l is the length. The dimension Formula for m Will be

Q.

What is the audible range of sound for human beings?

Q. What are harmonics?

Q.

In Meldes experiment in the transverse mode, the frequency of the tuning fork and the frequency of the waves in the string are in the ratio

1. $2:1$

2. $4:1$

3. $1:1$

4. $1:2$

Q. Ultrasound has frequency of vibration ___.

1. between 20 and 20, 000 Hz
2. below 20 Hz
3. above 20, 000 Hz
4. between 500 and 10, 000 Hz

Q.

Why is natural frequency important?

Q. If a sound has a high amplitude then it also has ____________.

1. fast echos
2. a low pitch
3. a high volume
4. a low volume

Q. Which of the following frequencies will be inaudible to human ear?

1. 10 Hz
2. 100 Hz
3. 1, 000 Hz
4. 10, 000 Hz

Q. Humans can hear the sound created by every vibrating body.

1. True
2. False

Q. Question 10
Ultrasound has frequency of vibration

(a) Between 20 and 20, 000 Hz
(b) Below 20 Hz
(c) Above 20, 000 Hz
(d) Between 500 and 10, 000 Hz

Q. Any sound of frequency less than $20Hz$ is not audible to human ears.

1. True
2. False

Q. 40. A source of sound gives 5beats per second when sounded with another sourse of frequency 100Hz.the second harmonic of the sourse together with a sourse of frequency 205Hz gives 5 beats/second. what is the freequency of the source?

Q. The graph given here shows the frequency of sound emitted by a source for 30 seconds. For how many seconds a normal human being be able to hear the sound?

1. 30 s
2. 25 s
3. 10 s
4. 20 s

Q. Name and define the characteristic which enables one to distinguish two sounds of same loudness, but of different frequencies, given by the same instrument.

Q. Which of the following sounds are inaudible to humans?

1. 
   $10Hz$
2. 
   $50Hz$
3. 
   $10,000Hz$
4. 
   $30,000Hz$

Q. Audible range of frequencies for humans is .

1. 20- 2000 Hz
2. 20-200 Hz
3. 20-20000 Hz

Q.

We can hear the sound of frequency in the range of ______.

Q. The intensity of sound from a jet engine is ___.

1. 0 dB
2. 50 dB
3. 120 dB
4. 15 dB

Q. Which among the following frequencies is inaudible to humans?

1. $20Hz$
2. $5Hz$
3. $50Hz$
4. $30Hz$

Q. Which of the following frequency ranges are audible to us?

1. 20-200 Hz
2. 200-2000 Hz
3. 2000-20, 000 Hz
4. 0-20 Hz

Q. Sounds of frquency above $20kHz$ is called:

1. Audible sound
2. Ultrasonic sound
3. Supersonic sound
4. Infrasonic sound

Q.

state the relation between frequency and length of the air column. name an instrument based on the working of air column