1.

The value of amplitude at an antinode , on an undamped one dimensional stationary wave of wavelength 1.2 m, is 5mm. Then the value of amplitude of particle at a distance of 15cm from an antinode isA. 3.535 mmB. 0.707 mmC. 5 mmD. 7.07 mm

Answer» Correct Answer - A
`R=2Acos (2pix)/(lamda)`
`=5xx10^(-3) cos(2pixx0.5)/(1.2)`
`=5xx10^(-3)cospi/4=3.535`mm


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