Progressive waves (A level 11 Grade)

The graph represents a sound wave. Which statement is correct?

• The wave is longitudinal and has a period of 25 ms.

• The wave is longitudinal and has a frequency of 50 Hz.

• The wave is transverse and has an amplitude of 3 µm.

• The wave is transverse and has a wavelength of 20 ms.

The two graphs represent the same wave. Graph 1 shows the variation with time of the displacement at a particular distance. Graph 2 shows the variation with distance of the displacement at one instant. What is the speed of the wave?

• 22.5 cm s^-1

• 30.0 cm s^-1

• 90.0 cm s^-1

• 120 cm s^-1

A transverse wave on a rope has wavelength λ and period T.

The graph shows the variation of the displacement of the particles of the rope with distance in the

direction of travel of the wave at time t = 0.

A particle X is labelled.

Which graph shows the variation of the displacement of particle X with time t ?

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A progressive wave on a wire has a frequency of 10Hz. Two points on the wire, separated by a distance of 0.25 m, have a phase difference of 22.5°. What is the maximum speed of the wave?

• 2.5 m s^-1

• 10 m s^-1

• 20 m s^-1

• 40 m s^-1

A vibration generator produces a progressive wave on a rope. The diagram shows the rope at one instant. The wave travels at a speed of 4.0 m s^-1 . What are the wavelength and the frequency of the wave?

• Wavelength: 0.13 m

  Frequency: 15 Hz

• Wavelength: 0.13 m

  Frequency: 30 Hz

• Wavelength: 0.27 m

  Frequency: 15 Hz

• Wavelength: 0.27 m

  Frequency: 30 Hz