The diagram above shows a waveform in which energy is transferred from A to B in a time of 2.5 x 10-3s. Calculate the frequency of the wave
-
A.
2.0 x 103Hz -
B.
1.0 x 103Hz -
C.
4.0 x 10-2Hz -
D.
1.0 x 10-3Hz -
E.
5.0 x 104Hz.
Correct Answer: Option B
Explanation
The waveform moved from A to B in (2.5 times 10^{-3}) seconds.
From the diagram, A to B has (2frac{1}{2}) complete oscillations between it, Therefore, the period of the oscillation is
(frac{2.5 times 10^{-3}}{2.5} = 1 times 10^{-3} s)
(Frequency = frac{1}{Period})
= (frac{1}{1 times 10^{-3}} = 1 times 10^{3} Hz)