What is the phase difference between two successive crests in the wave?

(1) π

(2) π/2

(3) 2π

(4) 4π

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A wave of the frequency of 500 Hz has a velocity of 360 m/sec. The distance between two nearest points 60° out of phase, is :

(1) 0.6 cm

(2) 12 cm

(3) 60 cm

(4) 120 cm

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Types of waves
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Sound waves of wavelength greater than that of audible sound are called :

(1) Seismic waves

(2) Sonic waves

(3) Ultrasonic waves

(4) Infrasonic waves

Concept Questions :-

Types of waves
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The ratio of masses of nitrogen and oxygen is 14:16. The temperature at which the speed of sound in nitrogen will be same at that in oxygen at 55°C is -

(1) 35°C

(2) 48°C

(3) 65°C

(4) 14°C

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Energy of waves
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A wavelength 0.60 cm is produced in air and it travels at a speed of 300 ms–1. It will be an 

(1) Audible wave

(2) Infrasonic wave

(3) Ultrasonic wave

(4) None of the above

Concept Questions :-

Types of waves
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An observer standing near the seashore observes 54 waves per minute. If the wavelength of the water wave is 10m then the velocity of a water wave is :

(1) 540 ms-1

(2) 5.4 ms-1

(3) 0.184 ms-1

(4) 9 ms-1

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The equation of a wave is y=2sinπ(0.5x200t), where x and y are expressed in cm and t in sec. The wave velocity is :

(1) 100 cm/sec

(2) 200 cm/sec

(3) 300 cm/sec

(4) 400 cm/sec

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Equation of a progressive wave is given by

y=0.2cosπ0.04t+.02xπ6

The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of π/2 :

(1) 4 cm

(2) 8 cm

(3) 25 cm

(4) 12.5 cm

Concept Questions :-

Types of waves
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Two waves are given by y1=asin(ωtkx) and y2=acos(ωtkx). The phase difference between the two waves is :

(1) π4

(2) π

(3) π8

(4) π2

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Types of waves
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If the amplitude of waves at distance r from a point source is A, the amplitude at a distance 2r will be :

(1) 2A

(2) A

(3) A/2

(4) A/4

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