1.

The equation of a plane progressive is given by y = 0.025 sin (100 t + 0.25 x). The frequency of this wave would be :

Answer»

50 HZ
100 Hz
`(50)/(pi)` Hz.
None of these.

Solution :y = 0.025sin (100 t + .25 X)
compare it with standard form
y = r sin `(omega t + kx)`
`omega= 100 sec^(-1)`
`2pi v = 100 "" rArr "" v = (100)/(2 pi) =(50)/(pi ) `Hz.
Correct choice is (C) .


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