Three waves of equal frequency having amplitudes 10 mm, 4 mm and 7 mm – McqOptions

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1.	Three waves of equal frequency having amplitudes 10 mm, 4 mm and 7 mm arrive at a given point with successive phase difference of \[\frac{\pi }{2}\]. The amplitude of the resulting wave in mm is given by [AIIMS 1995]
A.	7
B.	6
C.	5
D.	4
Answer» D. 4

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