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Saturday, 15 August 2026
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Physics Past Questions and Answers

Topic: Waves from stretched strings

Jamb Physics Questions - Waves from stretched strings

Question 1:
a guitar string is 75cm long. the wavelength of its fundamental note is
  • A 75cm
  • B 150cm
  • C 37.5cm
  • D 112cm
  • E 50cm
View Answer & Explanation
Question 2:
The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40Hz and 150Hz?
  • A 1
  • B 2
  • C 3
  • D 4
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Question 3:
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
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Question 4:
The fundamental frequency of vibration of a sonometer wire may be halved by
  • A Doubling the length of the wire
  • B Doubling the mass of the wire
  • C Reducing the tension by half
  • D Reducing the absolute temperature by half
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Question 5:
The note produced by a stretched string has a fundamental frequency of 400Hz. If the length of the string is doubled while the tension in the string is increased by a factor of 4, the frequency is
  • A 200Hz
  • B 400Hz
  • C 800Hz
  • D 1600Hz
View Answer & Explanation