A transverse wave is represented by y=A sin ωt-kx. For what value of the wavelength is the wave velocity equal to the maximum particle velocity?

(1) π A/2                                           

(2) π A

(3) 2 π A                                           

(4) A

Subtopic:  Types of Waves |
 83%
From NCERT
NEET - 2010
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A tuning fork of frequency 512 Hz makes 4 beats/s with the vibrating strings of a piano. The beat frequency decreases to 2 beats/s when the tension in the piano strings is slightly increased. The frequency of the piano string before increasing the tension was:
1. 510 Hz                       
2. 514 Hz
3. 516 Hz                       
4. 508 Hz

Subtopic:  Beats |
 70%
From NCERT
NEET - 2010
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A wave in a string has an amplitude of 2 cm. The wave travels in the +ve direction of x-axis with a speed of 128 ms-1 and it is noted that 5 complete waves fit in 4 m length of the string. The equation describing the wave is :

(1) y=0.02m sin 7.85x +1005 t 

(2) y=0.02m sin 15.7x -2010 t 

(3) y=0.02m sin 15.7x +2010 t 

(4) y=0.02m sin 7.85x -1005 t 

Subtopic:  Travelling Wave on String |
 67%
From NCERT
NEET - 2009
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Each of the two strings of length 51.6 cm and 49.1 cm are tensioned separately by 20N force. Mass per unit length of both the strings is same and equal to 1 gm-1When both the strings vibrate simultaneously the number of beats is :

1. 5                                                   

2. 7

3. 8                                                   

4. 3

Subtopic:  Beats |
 59%
From NCERT
NEET - 2009
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Two periodic waves of intensities  I1 and I2 pass through a region at the same time in the same direction. The sum of the maximum and  minimum intensities is :

(1) I1+I2

(2) I1+I22

(3)I1-I22

(4) 2 I1+I2 

 

Subtopic:  Wave Motion |
 70%
From NCERT
NEET - 2008
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Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 s and the velocity of the wave is 300 m/s. What is the phase difference between the oscillations of two points?

(1) π3

(2) 2π3

(3) π

(4) π6

Subtopic:  Wave Motion |
 84%
From NCERT
NEET - 2008
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The wave described by y=0.25 sin(10πx-2πt), where x and y are in metres and t in seconds, is a wave traveling along the:

1. -ve x direction with frequency 1 Hz 
2. +ve x direction with frequency π Hz and wavelength λ =0.2 m 
3. +ve x direction with frequency 1 Hz and wavelength λ = 0.2 m
4. - ve x direction with amplitude 0.25 m and wavelength λ = 0.2 m


 

Subtopic:  Wave Motion |
 84%
From NCERT
NEET - 2008
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Two waves are represented by the equations y1=asinωt and y2=acosωt. The first wave 

(1) Leads the second by π

(2) Lags the second by 2π

(3) Leads the second by π2

(4) Lags the second by π2

Subtopic:  Wave Motion |
 61%
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The distance between two consecutive crests in a wave train produced in a string is 5 cm. If 2 complete waves pass through any point per second, the velocity of the wave is :

1. 10 cm/sec

2. 2.5 cm/sec

3. 5 cm/sec

4. 15 cm/sec

Subtopic:  Wave Motion |
 72%
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A tuning fork makes 256 vibrations per second in air. When the velocity of sound is 330 m/s, then the wavelength of the tone emitted is :

1. 0.56 m

2. 0.89 m

3. 1.11 m

4. 1.29 m

Subtopic:  Standing Waves |
 80%
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