Question

Note is a sound

• A. of mixture of several frequencies
• B. of mixture of two frequencies only
• C. of a single frequency
• D. always unpleasant to listen

Answer 1

The correct option is A

of mixture of several frequencies

Explanation for the correct option

Option (A)

1. Sound is one type of longitudinal wave.
2. When sound waves of different frequencies are superimposed, then notes produce.
3. So, a note is a sound wave that produces from a mixture of several sound waves.

Explanation for the incorrect options

Option (B)

1. The note is a sound of a mixture of two frequencies only, this statement is not true always. Not only two but several frequencies of sound waves can also produce notes.

Option (C)

1. A sound of a single frequency is a tone. The sound produced from a string of a guitar is a tone.

Option (D)

1. At resonance, the superposition or mixture of sound waves (note) is pleased to hear.

Hence, option (A) is correct.