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Wednesday, 15 April 2026
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Physics Past Questions and Answers

Topic: Frequency of a note emitted by air columns in closed and open pipes in relation to their lengths

Jamb Physics Questions - Frequency of a note emitted by air columns in closed and open pipes in relation to their lengths

Question 1:
When vibration occurs in air column, the distance between a node and an antinode is equal to
  • A One-quarter of the wavelength
  • B One-hall of the wavelength
  • C The wave length
  • D Twice the wavelength
  • E Four-times the wavelength
View Answer & Explanation
Question 2:
An organic pipe closed at one end is 80cm long. Determine the frequency of the fundamental note assuming that the speed of sound in air is 340ms-1
  • A 106Hz
  • B 213Hz
  • C 318Hz
  • D 425Hz
View Answer & Explanation
Question 3:
In a closed organ pipe producing a musical note, an antinode will always be produced at
  • A The closed end
  • B The open end
  • C The middle
  • D All the parts of the pipe
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Question 4:
A string is fastened tightly between two walls 24cm apart. The wavelength of the second overtone is
  • A 24cm
  • B 16cm
  • C 12cm
  • D 8cm
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Question 5:
An open pipe closed at one end produces its first fundamental note. If the velocity of sound in air is P and t the length of the pipe, the frequency of the note is
  • A <sup style='font-size: smaller;'>2v</sup>/<sub style='font-size: smaller;'>t</sub>
  • B <sup style='font-size: smaller;'>v</sup>/<sub style='font-size: smaller;'>5t</sub>
  • C <sup style='font-size: smaller;'>v</sup>/<sub style='font-size: smaller;'>4t</sub>
  • D <sup style='font-size: smaller;'>v</sup>/<sub style='font-size: smaller;'>2t</sub>
View Answer & Explanation