1.  5m

2.  20m

3.  15

4.  30m

Concept Questions :-

Wave motion
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The equation of a standing wave in a string is  where x is in metres and t is in seconds. At the position of antinote, how many times the distance of string particle becomes 200m from the mean position in one second

1.  100 times

2.  50 times

3.  200 times

4.  400 times

Concept Questions :-

Wave motion
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Eleven tuning forks are arranged in increasing order of frequency in such a way that any two consecutive tunning forks produces 4 beats per second. The highest frequency is twice that of the lowest. The frequency is twice that of the lowest. The highest and the lowest frequencies (in Hz) are respectively

1.  100 and 50

2.  44 and 22

3.  80 and 40

4.  72 and 30

Concept Questions :-

Standing waves
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Consecutive frequencies emitted from an organ pipe are 75Hz, 125Hz, 175Hz, the frequency of the 10th overtone will be

1.  275 Hz

2.  175 Hz

3.  525 Hz

4.  575 Hz

Concept Questions :-

Standing waves
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The sound intensity level at a point 10 m away from a point source is 20dB, then the sound level at a distance 1m from the same source would be

(1) 40 dB

(2) 30 dB

(3) 200 dB

(4) 100 dB

Concept Questions :-

Wave motion
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In the phenomenon of interference of sound by two coherent sources if difference of intensity at maxima to intensity at minima is 20dB, then the ratio of intensities of the two sources is

1.  $\frac{121}{81}$

2.  $\frac{11}{9}$

3.  $\frac{101}{99}$

4.  $\frac{10}{1}$

Concept Questions :-

Wave motion
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

When a sound wave travels from one medium to another, the quantity that remains unchanged is :

1.  speed

2.  amplitude

3.  frequency

4.  wavelength

Concept Questions :-

Wave motion
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If a sound source of frequency n approaches an observer with velocity v/4 and the observer approaches the source with velocity v/5, then the apparent frequency heard will be-

1.  (5/8)n

2.  (8/5)n

3.  (7/5)n

4.  (5/7)n

Concept Questions :-

Doppler effect
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The extension in a string, obeying Hook's law, is x. The speed of sound in the stretched string is v. If the extension in the string is increased to 1.5x, the speed of sound will be-

1.  1.22 v

2.  0.61 v

3.  1.50 v

4.  0.75 v

Concept Questions :-

Speed of sound
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The equation of plane progressive wave motion is y=a sin 2$\mathrm{\pi }/\mathrm{\lambda }$(vt-x). Velocity of particle is

(1) $y\frac{dv}{dx}$

(2) $v\frac{dy}{dx}$

(3) $-y\frac{dv}{dx}$

(4) $-v\frac{dy}{dx}$

Concept Questions :-

Speed of sound