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

Which of the following statements is incorrect with respect to music ?

1. It is pleasant to the ears.
2. Its waveform is irregular.
3. The sound level is low.
4. It is produced by periodic vibrations.

The pitch of a note depends on :

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

The voice of a woman is of …………… pitch than that of a man.

1. lower
2. higher
3. equal
4. cannot say