Question

The displacements of the wave are 4sinwt and 3coswt then amplitude of resultant amplitude is

Answer 1

the resultant amplitude is by

R^2 = a^2 + b^2 + 2×a×b×cos(phi) ...(1)

where phi is phase difference

and cos(wt) = sin(pi/2+wt)

so the phase difference is pi/2.

From (1) :-

cos(pi/2) = 0

and given a = 4 and b = 3

So R^2 = 4^2 + 3^2

therefore R = 5

Answer 2

Explanation:

Amplitude: The maximum displacement of the particle of medium on either side of its mean position is called the amplitude of wave. Its S.I. unit is metre (m).