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  • I have a doubt, kindly clarify. - Oscillations and Waves - JEE Main-2

A standing wave is formed by the superposition of two waves travelling in opposite directions.  The transverse displacement is given by

y\left ( x,t \right )= 0.5\sin \left ( \frac{5\pi }{4} x\right )\: \cos \left ( 200\pi t \right )                       

What is the speed of the travelling wave moving in the positive x direction ?

(x and t are in meter and second, respectively.)

  • Option 1)

     160 m/s

  • Option 2)

    90 m/s

  • Option 3)

    180 m/s

  • Option 4)

     120 m/s

     

 

Answers (1)

best_answer

As discussed in @7297

Speed of the travelling wave in the X direction will be 160 ms-1


Option 1)

 160 m/s

This option is correct

Option 2)

90 m/s

This option is incorrect

Option 3)

180 m/s

This option is incorrect

Option 4)

 120 m/s

 

This option is incorrect

Posted by

divya.saini

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