Physics
Assertion (A) : To make a shrill sound in a flute, holes are opened.
Reason (R) : The holes are opened to increase the length of the vibrating air column.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true and R is not the correct explanation of A
- Assertion is true but reason is false
- Assertion is false but reason is true
Answer
Assertion is true but reason is false
Explanation
Assertion (A) is true because to increase the pitch (or make the sound shrill) in a flute, the holes are opened so as to reduce the length of the vibrating air column.
Reason (R) is false because in a flute, holes are opened to reduce the length of the vibrating air column and vice versa.
Related Questions
By reducing the amplitude of the sound wave, its :
- pitch decreases
- loudness decreases
- loudness increases
- pitch increases
Pitch of a note depends on :
- amplitude
- loudness
- frequency
- waveform
Assertion (A) : Loudness and quality of sound are independent of each other.
Reason (R) : Loudness depends on amplitude while quality of sound depends on the waveform of sound.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true and R is not the correct explanation of A
- Assertion is true but reason is false
- Assertion is false but reason is true
Fill in the blanks:
(a) The time period of a wave is 2 s. Its frequency is …………… .
(b) The pitch of a stringed instrument is increased by …………… tension in string.
(c) The pitch of a flute is decreased by …………… length of air column.
(d) Smaller the membrane, …………… is the pitch.
(e) If a drum is beaten hard, its loudness …………… .
(f) A tuning fork produces sound of …………… frequency.