Equation of a progressive wave is given by

y=0.2cos0.04πt+0.02πxπ6

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

Subtopic:  Types of Waves |
 75%
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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

Subtopic:  Types of Waves |
 88%
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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

Subtopic:  Wave Motion |
 52%
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A wave is reflected from a rigid support. The change in phase on reflection will be : 

(1) π/4

(2) π/2

(3) π

(4) 2π

Subtopic:  Wave Motion |
 78%
From NCERT
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A plane wave is represented by x=1.2sin(314t+12.56y)

Where x and y are distances measured along in x and y direction in meters and t is time in seconds. This wave has 

(1) A wavelength of 0.25 m and travels in + ve x-direction

(2) A wavelength of 0.25 m and travels in + ve y-direction

(3) A wavelength of 0.5 m and travels in – ve y-direction

(4) A wavelength of 0.5 m and travels in – ve x-direction

Subtopic:  Types of Waves |
 76%
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The equation of a wave traveling in a string can be written as y=3cosπ(100tx). Its wavelength is :

(1) 100 cm

(2) 2 cm

(3) 5 cm

(4) None of the above

Subtopic:  Travelling Wave on String |
 83%
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A transverse wave is described by the equation y=Y0sin2πft-2πλx. The maximum particle velocity is four times the wave velocity if :

(1) λ=πY04

(2) λ=πY02

(3) λ=πY0

(4) λ=2πY0

Subtopic:  Types of Waves |
 81%
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A transverse wave of amplitude 0.5 m and wavelength 1 m and frequency 2 Hz is propagating in a string in the negative x-direction. The expression for this wave is :

(1) y(x,t)=0.5sin(2πx4πt)

(2) y(x,t)=0.5cos(2πx+4πt)

(3) y(x,t)=0.5sin(πx2πt)

(4) y(x,t)=0.5cos(2πx+2πt)

Subtopic:  Types of Waves |
 78%
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The displacement of a particle is given by y=5×104sin(100t50x), where x is in metres and t is in seconds. The velocity of the wave is:

1. 5000 m/sec

2. 2 m/sec

3. 0.5 m/sec

4. 300 m/sec

Subtopic:  Wave Motion |
 89%
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Which one of the following does not represent a traveling wave :

1. y=sin(xvt)

2. y=ymsink(x+vt)

3. y=ymsin(xvt)

4. y=f(x2vt2)

Subtopic:  Wave Motion |
 85%
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