Frequency Of A Note Emitted By Air Columns In Closed And Open Pipes In Relation To Their Lengths - Physics Jamb Past Questions and Answers

Question 1 :

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2 :

• JAMB 1981

All of the following frequencies are overtones of 320 Hz EXCEPT

A. 960Hz
B. 640Hz
C. 520Hz
D. 1280Hz
E. 1600Hz

Question 3 :

• JAMB 1983

In a resonance tube experiment, a tube fixed length is closed at one end and several tuning forks of increasing frequency used to obtain resonance at the open end. If the tuning fork with the lowest frequency which gave resonance had a frequency f₁ and the next tuning fork to give resonance had a frequency f₂, find the ratio \(\frac{f^2}{f^2}\).

A. 8
B. 3
C. 2
D. \(\frac{1}{2}\)
E. \(\frac{1}{3}\)

Question 4 :

• JAMB 1983

In a resonance tube experiment, a tube fixed length is closed at one end and several tuning forks of increasing frequency used to obtain resonance at the open end. If the tuning fork with the lowest frequency which gave resonance had a frequency f₁ and the next tuning fork to give resonance had a frequency f₂, find the ratio \(\frac{f^2}{f^2}\).

A. 8
B. 3
C. 2
D. \(\frac{1}{2}\)
E. \(\frac{1}{3}\)

Question 5 :

• JAMB 1983

which of the following is NOT correct? i. the pitch of a sound note depends on the frequency of vibrations. ii. the intensity of a sound note is proportional to the amplitude of vibrations. iii. beats are produced by two sources of sound because one wave is travelling faster than the other. iv. when two sources of sound of frequencies 500Hz and 502Hz are sounded together, a beat frequency of 2Hz is observed. v. the first harmonic of a tone have double the frequency of the fundamental note.

A. I and ii
B. Ii and iii
C. I and iii
D. Iii and iv
E. Iv and v