Waves - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 1978

a guitar string is 75cm long. the wavelength of its fundamental note is

A. 75cm
B. 150cm
C. 37.5cm
D. 112cm
E. 50cm

Question 2:

• JAMB 1978

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

Question 3:

• JAMB 1978

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

Question 4:

• JAMB 1979

If the wavelength of a wave travelling with a velocity of 360ms-1 is 60m, the period of the wave is

A. 6s
B. 3.6s
C. 0.17s
D. 0.61s
E. 3s

Question 5:

• JAMB 1979

Which of the following electromagnetic waves has the shortest wavelength?

A. Radio waves
B. X-rays
C. Infra-red
D. Blue light
E. Ultraviolet