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%
From NCERT
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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%
From NCERT
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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%
From NCERT
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Sound waves have the following frequencies that are audible to human beings :

1. 5 c/s

2. 27000 c/s

3. 5000 c/s

4. 50,000 c/s

Subtopic:  Speed of Sound |
 71%
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The minimum audible wavelength at room temperature is about

1. 0.2 Å

2. 5 Å

3 5 cm to 2 metre

4. 20 mm

Subtopic:  Speed of Sound |
From NCERT
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The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K is 

1.  2/7

2.  1/7

3.  3/5

4.  6/5

Subtopic:  Speed of Sound |
 51%
From NCERT
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The frequency of a rod is 200 Hz. If the velocity of sound in air is 340 ms–1, the wavelength of the sound produced is :

1. 1.7 cm

2. 6.8 cm

3. 1.7 m

4. 6.8 m

Subtopic:  Speed of Sound |
 83%
From NCERT
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