1.

A wave is represented by the equation `y=10 sin 2pi (100 t-0.02x)+ 10 sin 2pi (100t +0.02 x).` The maximum amplitude and loop length are respectively.A. 20 units and 30 unitsB. 20 units and 25 unitsC. 30 units and 20 unitsD. 25 units and 20 units

Answer» Correct Answer - B
`y 20 sin 2pi (100t) cos 2 pi (0.02x)`
`therefore A =20, `loop length `=lamda//2 =(50)/(2) =25` units


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