Physics · 2019
JEE Main · 12 January 2019, Shift 1 · Q13
A travelling harmonic wave is represented by the equation y(x, t )=10^-3 sin (50 t +2 x), where x and y are in meter and t is in seconds. Which of…
A travelling harmonic wave is represented by the equation $\displaystyle y(x, \mathrm{t})=10^{-3} \sin (50 \mathrm{t}+2 x)$, where $\displaystyle x$ and $\displaystyle y$ are in meter and t is in seconds. Which of the following is a correct statement about the wave ?
Official answer
(2)
The wave is propagating along the negative $\displaystyle x$-axis with speed $\displaystyle 25 \mathrm{~ms}^{-1}$.
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.