A wave is y = a sin ( 20 π x − 30 π t + 4 π ) ( x in m, t in s). Which statements are correct?

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PhysicsWave on StringWavesEasy2 minQB

PhysicsEasymultiple choice

A wave is $y = a sin (20 π x - 30 π t + \frac{π}{4})$ ( $x$ in m, $t$ in s). Which statements are correct?

Answer:

A, C

Solution:

The $- 30 π t$ with $+ 20 π x$ form travels along $+ x$ with $v = 30 π /20 π = 1.5$ m/s. $λ = 2 π /20 π = 0.1$ m. $f = 15$ Hz.

Stream:JEESubject:PhysicsTopic:Wave on StringSubtopic:Waves

⏱ 2mℹ️ Source: QB

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