JEE Main & Advanced
Physics
Wave Mechanics
Question Bank
Interference and Superposition of Waves
question_answer
If two waves having amplitudes 2A and A and same frequency and velocity, propagate in the same direction in the same phase, the resulting amplitude will be [MP PET 1991; DPMT 1999]
A) 3A
B) \[\sqrt{5}A\]
C) \[\sqrt{2}A\]
D) A
Correct Answer:
A
Solution :
In the same phase f = 0 so resultant amplitude = \[{{a}_{1}}+{{a}_{2}}=2A+A=3A\]