Two sounds of the same loudness and same pitch produced by two different instruments differ in their

1. amplitudes
2. frequencies
3. wave forms
4. all the above

Instruments A and B are producing sounds of the same amplitude, same waveform but frequencies F and 2F respectively. Which of the following statements is correct ?

1. both A and B differ in quality
2. B is grave but A is shrill
3. A is grave but B is shrill
4. B is louder than A

Out of the following, which instrument emits a monotone ?

1. guitar
2. flute
3. piano
4. tuning fork

The pitch of a note depends on :

1. frequency
2. amplitude
3. waveform
4. loudness