Period And Frequency Essay

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Q1. What is the relationship between period and frequency?
Period refers to the amount of time needed to complete 1 cycle and is expressed in seconds. Frequency is the number of cycles per second and is measured in Hertz(Hz) , or the rate of change with respect to time.
Period and frequency are the inverse of each other, the mathematical representation of the relation is:
Frequency = 1/T (period)
Period = 1/F (frequency)
Example:
The period of a single cycle is 0.1 seconds, so to find the frequency using the formula you divide 1 by 0.1, which would give you 10, so the frequency would be 10Hz.
And if you divide 1 by 10(frequency), it would give you 0.1(period)
Thus it takes 0.1 seconds to complete a single cycle and there are 10 complete cycles …show more content…

What does the amplitude of a signal measure? What does the frequency of a signal measure? What does the phase of signal measure?
Amplitude: Value of the signal at any given point.
Frequency: Is described as the number of periods in one second but is a measurement of the rate of change of a signal with respect to time
Phase: The position of the waveform relative to time zero(0), phase is measured in degrees or radians.
Q3-How can a composite signal be decomposed into its individual frequencies?
A composite signal can be periodic or non-periodic, the Fourier analysis states that a composite signal can be decomposed into its individual frequencies by using frequency-domain graphs.

•If the composite signal is periodic, the decomposition will result in discrete frequencies.

•If the composite signal is non-periodic, the signal can be decomposed into an infinite number of simple sine waves with continuous …show more content…

Wavelength can be calculated with the following formula:
Wavelength = propagation speed * period = propagation/frequency
However optical signals have shorter wavelengths because the cables decrease the propagation speed (speed of light). Q10- Can we say a signal is periodic or non-periodic by just looking at its frequency domain plot? How?
Yes, the frequency domain plot of a non-periodic signal will show us continuous values, while the frequency domain plot of a periodic signal will show discrete values.
Q11-Is the frequency domain plot of a voice signal discrete or continuous?
Normally a voice signal is non-periodic so this would mean the frequency domain plot would be continuous.
Q12-Is the frequency domain plot of an alarm system discrete or continuous?
An alarm system is the opposite of a voice signal and is normally periodic which would mean the frequency domain plot would be discrete.
Q13-We send a voice signal from a microphone to a recorder. Is this base-band or broad-band transmission?
Broad-band transmission, modulation is

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