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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Waves

Jamb Physics Questions - Waves

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 boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of two tin cans. The physical principle employed is that sound travels
  • A Mainly through air
  • B Fainter in stretched string
  • C Faster through gases than in solids and liquids
  • D With greater ease through a string than in air
  • E None of the above is correct
View Answer & Explanation
Question 3:
A herdsman yelling out to fellow herdsman heard his voice reflected by cliff 4s later. What is the velocity of sound in air if the cliff is 680m away?
  • A 170ms<sup style='font-size: smaller;'>-1</sup>
  • B 136ms<sup style='font-size: smaller;'>-1</sup>
  • C 340ms<sup style='font-size: smaller;'>-1</sup>
  • D 680ms<sup style='font-size: smaller;'>-1</sup>
  • E 510ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 4:
A string is sustaining a stationary wave when
  • A The frequency of the wave is not proportional to the wavelength of the wave
  • B The amplitude of vibration is always zero
  • C Two equal waves are travelling in opposite directions
  • D The waves are longitudinal
  • E The frequency is directly proportional to the length of the string
View Answer & Explanation
Question 5:
Which of the following types of waves cannot travel through a vacuum?
  • A Sound waves
  • B Light waves
  • C Infra-red waves
  • D X-radiation
  • E Redio waves
View Answer & Explanation