Question
A cathode-ray oscilloscope (CRO) is used to determine the frequency of a sound wave. The diagram shows the waveform on the screen.
The time-base setting is \(5.0\) ms \(div^{–1}\).
What is the best estimate of the frequency of the sound wave?
A \(50\) Hz B \(71\) Hz C \(100\) Hz D \(143\) Hz
Answer/Explanation
Ans:
Question
Which statement about transverse or longitudinal waves is not correct?
A Longitudinal waves can be used to demonstrate diffraction.
B Longitudinal waves can travel in a vacuum.
C Transverse waves can form stationary waves.
D Transverse waves can transfer energy.
Answer/Explanation
Ans:
Question
A longitudinal wave travelling from left to right has vibrations parallel to the direction of transfer of
energy by the wave.
The wave can be represented on a graph showing the variation with distance of the displacement
of the particles from their equilibrium positions at one instant.
Which point on the graph is the centre of a compression?
Answer/Explanation
Ans:
Question
The graph shows the variation with time of the displacement of an electromagnetic wave at a
point.
Answer/Explanation
Question
The graph shows the variation with time of displacement for two different waves X and Y.