Wave motion 01

The given diagram shows the variation of displacement of a particle with time caused by a progressive wave traveling at a speed of 5.0 km s^‑1. What is the amplitude of the wave?

• 4 mm

• 4 μm      

• 2 mm

• 2 μm      

The given diagram shows the variation of displacement with the time of a particle caused by a progressive wave traveling at a speed of 5.0 km s^‑1. Which of the following is the wavelength of the wave?

• 150 mm

• 100 mm

• 50 mm

• 20 mm

• 10 mm

An electromagnetic wave of frequency ƒ has wavelength λ and travels at speed c in a vacuum. The respective wavelength and speed of an electromagnetic wave of frequency ƒ/2?

• λ/2 , c/2

• λ , c/2

• λ , c

• 2 λ , c/2

• 2 λ , c

At a point in air through which a sound wave travels at  340 m s^‑1, the variation of pressure with time is shown in the graph. Which of the following is the frequency of the wave?

• 1. 7 Hz

• 5.0  x 103 Hz

• 2.5  x 103        Hz

• 1.0 x 104 Hz   

• 2.5 x 104  Hz

The given diagram shows the variation of the displacement with the time of a particle in a progressive wave that is traveling at a speed of 5.0 km s^-1. Which of the following is the frequency of vibration of the particle?  

• 2.5 kHz

• 5.0 kHz

• 25.0 kHz

• 45.0 kHz

• 50.0kHz

A particular wave has a displacement-time graph as shown. A second wave of the same type, with twice the intensity and half the frequency, has its displacement-time graph drawn on the same axes. What would the graph for the second wave look like?

• 
• 
• 
• 

A sound wave traveling in the air has a frequency of 400 Hz and a speed of 320 m s^-1. Two points in the direction of travel are 0.2 m apart. What is the phase difference between the points?

• Positive, moving downwards

• Negative, motionless

• Positive, moving upwards

• positive, motionless

• Negative, moving downwards

The given diagram shows parallel water wavefronts of wavelength 10 m approaching a straight sea wall. The angle between the wavefronts and the wall is 30°. Which of the following is the phase difference between the waves at two points 5 m apart along the wall?

• 45°

• 90°

• 120°

• 180°

• 270 °

Two sinusoidal waves R and S are represented in the given graph. Which pair of equations correctly represents the waves?