Characteristics of Sound Waves - Jamb Physics Past Questions and Answers

Question 16:

• JAMB 1988

A piano wire 0.5m long has a total mass of 0.01kg and is stretched with a tension of 800N. Calculate the frequency of the wire when it sounds its fundamental note

A. 200Hz
B. 100Hz
C. 4Hz
D. 2Hz

Question 17:

• JAMB 1988

A note is called an octave of another note when

A. Its frequency is twice that of the first note
B. Its frequency is half of the first note
C. The notes have the same fundamental frequency
D. Its periodic time is twice that of the first note

Question 18:

• JAMB 1988

A slight loading of a tuning fork has the effect of

A. Decreasing its amplitude
B. Increasing its amplitude
C. Decreasing its frequency
D. Increasing its frequency

Question 19:

• JAMB 1991

Two tuning forks of frequency 256Hz and 260Hz are sounded close to each other. What is the frequency of the beats produced?

A. 2Hz
B. 4Hz
C. 8Hz
D. 258Hz

Question 20:

• JAMB 1991

When the bottom tip of a vibrating tuning fork is held in contact with a wooden box, a louder sound is heard. This phenomenon is known as

A. Beats
B. Echoing
C. Resonance
D. Reverberation