Q67 / 90 · JEE Main 2021 (17 Mar Shift 2) · Physics

A sound wave of frequency 245 Hz travels with the speed of 300 m s-1 along the positive x-axis. Each point of the wave moves to and fro through a total distance of 6 cm. What will be the mathematical expression of this travelling wave?

  • A
    Y(x,t)=0.03sin5.1x-0.2×103t
  • B
    Y(x,t)=0.06sin5.1x-1.5×103t
  • C
    Y(x,t)=0.06sin0.8x-0.5×103t
  • Correct answer
    D
    Y(x,t)=0.03sin5.1x-1.5×103t

Solution

ω=2πf

=1.5×103

A=62=3 cm=0.03 m

Hence, the correct answer is option: 'D'.

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