A wire of length 400cm is stretched between two fixed points. When plucked, its fundamental frequency is 150Hz. Calculate the speed of the wave produced.
-
A.
250(ms^{-1}) -
B.
625(ms^{-1}) -
C.
1200(ms^{-1}) -
D.
1500(ms^{-1})
Correct Answer: Option C
Explanation
The fundamental frequency ((f_{0})) = (frac{v}{2l})
(f_{0} = 150Hz; l =400cm = 4m)
(150 = frac{v}{2times 4})
(v = 150 times 8 = 1200ms^{-1})