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Calculate the frequency of the waveform v(t) = sin(πt+π÷4) + sin(πt+π÷74) + sin(πt+π÷56).(a) .1 Hz(b) .8 Hz(c) .5 Hz(d) .2 HzI have been asked this question during an interview.My question comes from Solar Powered Vehicles topic in chapter Solar and Battery Powered Drives of Electric Drives

Answer»

The correct choice is (c) .5 Hz

To EXPLAIN I would say: The FUNDAMENTAL time period of the sine wave is 2π. The time period of i(t) is L.C.M {2,2,2}=2 SEC. The frequency of the waveform is 1/2=.5 Hz. The time period is independent of PHASE SHIFTING and time-shifting.


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