Question

Statement I:In a progressive logitudinal wave, the amplitude of the wave will not be the same at all points of the medium along the direction of motion of the wave.
Statement II: there is a continuous change of the phase angle of the wave as it progressive in the direction of motion.
A. Statement I is true, statement II is true and statement II is the correct explaination for statement I.
B. Statement I is true, statement II is true and statement II is NOT the correct explaination for statement I.
C. Statement I is true, statement II is false.
D. Statement I is false, statement II is true.

Answer 1

Correct Answer - d
Amplitude of a progressive longitudinal wave is the same at all points of a medium, assuming there is no attenution. It is the instantaneous displacement of a particle frome the mean position that differs and depends upon the phase angle of the wave.