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波的傳播

物理 · 共 27 題 · 點擊選項即時核對答案

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21.

A train of water waves is generated in a ripple tank. The graph below shows the variation of the displacement of a cork placed in the water with time. Find the frequency of the waves.

Displacement (cm) against time (s) graph, amplitude 0.25 cm, period 0.2 s
22.
Vibrator generating a wave on a string travelling to the right, with points P and Q marked

A vibrator generates a travelling wave on a string. The above diagram shows the shape of the string at a certain instant. Which of the following shows the shape of the string between PP and QQ after a quarter of a period ?

Four possible shapes of the string between P and Q, A to D
23.
Water wave travelling to the right with P at a crest, Q on the equilibrium line and R at a trough

A water wave travels towards the right. The above diagram shows the waveform at a certain instant. Which of the following statements is/are true ?

(1)Particle PP is moving downwards.
(2)Particle QQ is moving upwards.
(3)Particle RR is momentarily at rest.
24.
Water wave travelling to the right with particles P, Q, R and S marked

The above diagram shows a water wave travelling to the right. Which of the following statements is/are true ?

(1)PQPQ is equal to the wavelength.
(2)PRPR represents the amplitude.
(3)The particle at PP will move to SS after a quarter of a period.
25.
Vibrator attached to a string, one complete vibration made, wave travelling to the right

A vibrator of frequency 55 Hz generates waves on a string. The above diagram shows the shape of the string at the instant when the vibrator has made one complete vibration. Which of the following best shows the waveform 0.10.1 s later ?

Four string waveforms A to D
26.
Wave on a string at t = 0.000 s and at t = 0.025 s

The above figures show a wave in the same section of string at two different instants. What is the greatest possible period of the wave ?

27.
Transverse wave with particles P at a crest, Q on the equilibrium line and R at a trough

A transverse wave is travelling steadily from left to right through a series of particles. At a certain instant the wave form is as shown in the figure. Which of the following statements about the particles is/are correct ?

(1)Particle PP is moving down.
(2)Particle QQ is moving up.
(3)Particle RR is momentarily at rest.
物理 波的傳播 DSE、CE 選擇題（第 3 頁） | dselib