NEET Physics Wave Motion MCQ Question
Consider a sinusoidal wave travelling along a string described by the equation y(x, t) = 0.005 sin (80.0 x - 3.0 t). Which of the following is the correct expression for the phase of this wave at a position x = 0.3 m and time t = 2 s?
80.0 * 0.3 - 3.0 * 2
80.0 * 0.3 + 3.0 * 2
80.0 * 2 - 3.0 * 0.3
80.0 * 2 + 3.0 * 0.3
Correct Answer
Detailed Explanation
The phase of the wave is given by the expression (kx - ωt). Substituting k = 80.0 m^-1, ω = 3.0 s^-1, x = 0.3 m, and t = 2 s, the phase becomes 80.0 * 0.3 - 3.0 * 2.
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