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JEE Main 201912 AprilMorning Shift
Exam
JEE Main
Year
2019
Date
12 April
Shift
Morning Shift
Subject
Physics
Chapter
Waves and Sound

JEE Main 2019 · 12 April · Morning Shift · Physics · Waves and Sound

A progressive wave travelling along the positive x - direction is...

A progressive wave travelling along the positive x−x - direction is represented by y(x,t)=Asin(kx−\omegat+ϕ)y\left(x, t\right) = Asin ( kx - \omegat + ϕ ) . Its snapshot at t=0t = 0 is given in the figure.
A progressive wave travelling along the positive x - direction is represented by y(x, t) = Asin ( kx - + ϕ ) . Its
For this wave, the phase ϕϕ is:

Options

  1. Aπ2\dfrac{\pi}{2}
  2. B00
  3. Cπ\pi
  4. D−π2- \dfrac{\pi}{2}

Correct answer

C. π\pi

Step-by-step solution

A progressive wave travelling along the positive x - direction is represented by y(x, t) = Asin ( kx - + ϕ ) . Its

y=Asin(kx−\omegat+ϕ)y = Asin ( kx - \omegat + ϕ )

at x=0,t=0,y=0x = 0, t = 0, y = 0 and slope is negative

⇒ϕ=π⇒ ϕ = \pi

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