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Which of the following equations represents a wave travelling along the y-axis?

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Which of the following equations represents a wave travelling along the y-axis?

(A) x = Asin (ky - ωt)

(B) y = Asin (kx - ωt)

(C) y =Asin (ky) cos(ωt)

(D) y =Acos (ky) sin(ωt )

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(A) x = Asin (ky - ωt)

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