According to the Fourier series, a periodic sine wave has (select one): (a) The fundamental frequency only (b) Even Harmonic waveforms (c) Odd Harmonic Waveforms
Consider the previous problem again. What is the bandwidth associated with it? Answer:
According to the Fourier series, a periodic square wave has (select one): (a) The fundamental frequency only (b) Even Harmonic waveforms (c) Odd Harmonic Waveforms
Consider the previous problem again. What is the bandwidth associated with it?
Homework Answers
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ANSWER-21 ==>
(a) The fundamental frequency only
As, we know a 60 Hz sine wave has only one component of 60 Hz. And this is the fundamental frequency component.
ANSWER-22 ==>
Bandwidth associated with it, B ==>
B = Highest frequency component present - Lowest frequency component present = 60 - 60 = 0 Hz
==> B = 0 Hz
ANSWER-23 ==>
(c) Odd harmonic waveforms
We know that the ideal square wave contains components of odd
harmonic frequencies (of the form (2k − 1)f, here f is fundamental
frequency), alongwith the fundamental component (f). So, (c) is the
correct answer. Also, please note that the lowest frequency
component in this waveform is f and highest frequency component is
infinity.
ANSWER-24 ==>
Bandwidth associated with it, B ==>
B = Highest frequency component present - Lowest frequency component present = Infinity - f
==> B = Infinity Hz
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