Question:
How are the frequency and amplitude of a wave related?
Mrs. Bieber
2009-12-16 17:05:43 UTC
Could someone please help me with this, thanks :) Love you <3 Bye :)
Nine answers:
Bony
2009-12-16 18:10:26 UTC
They are fundamentally related in that

one cannot exist without the other.



FREQUENCY

In a general context, frequency is the number

of cycles per second. It could refer to an oscillating

pendulum, tidal waves, audio or radio signals.



Whatever the frequency, medium or shape, it cannot

exist without at least two amplitude levels. A square

wave would be an example of this. Triangular and

sine waves would could cycle through an almost

infinate range of values.



A frequency does NOT have to be AC.

Think Digital Square Wave computer clock.



AMPLITUDE

For a frequency to to exist there must be

some change in value over the cycle.

Consider an electrical frequency.

For the usual Sine Wave the +peak would

be as positive above 0v or ground, as the -peak

would be as negative relative to the 0v or Ground.



The values of either of these peaks, would be considered

the amplitude of the wave. Here Vp = Vp-p / 2



Seeing the wave as a graph, or scope display,

the Horizontal scale INDIRECTLY gives the Frequency,

as it can be determined from the cycle time or period

of the graph. So, f in Hz = 1 / cycle time in secs.



From the Vertical scale, the amplitude of the wave can

be determined. However its easier to determine the Vp-p,

and divide it by two to get Vp which is the AMPLITUDE



Relating the Frequency and Amplitude of a signal,

we could say for example,

15kHz sine wave, with an amplitude of 2.6V.
David F
2009-12-16 17:21:28 UTC
In an electronic operational amplifier circuit, they are related by the "slew rate".



In filter circuits, the output amplitude can be calculated as a function of input amplitude, input frequency, and "transfer function".



Otherwise, x(t) = A sin (B t)



Where x(t) is the instantaneous amplitude at time t, A is the maximum amplitude, and B is the frequency in radians per second.



Generally though, A is refered to as the amplitude, and is independant of B.
2016-05-26 03:51:45 UTC
They are both parts of a wave? :-p The frequency refers to how many 'waves' per second. The amplitude refers to how big or tall each wave is. another way to think of it is that the frequency is the horizontal size of a wave, and the amp is the vertical measurement
Mr. Un-couth
2009-12-16 18:10:52 UTC
The fundamental frequency of a Voltage wave is fixed and is determined at the source and is independent of the wave`s amplitude.



The initial amplitude of a radiated Voltage wave is determined at the source also but it`s Voltage field strength at different distances is a function of frequency as well as distance and other variables.
sivamani
2009-12-16 17:58:58 UTC
usually a wave is denoted by x(T)=A SIN (2*pi*f*T)

where A-amplitude

T-instant time

f-frequency

but there is no more relation ship exists upto date in my knowledge like that you have asked

in addition there is aconcept in amplifier that amplitude stability relies mainly on frequence range
Lord Of The Watch Tower
2009-12-16 17:31:15 UTC
by wave length, amplitude is the energy applied to the frequency desired.

hey Joe how do you explain radio transmissions!
billrussell42
2009-12-16 17:09:52 UTC
usually they are not.



there may be circuits where they are related, for example in filters, but each is different with a different relationship.



.
Joe
2009-12-16 17:12:45 UTC
No relation at all.
2009-12-16 21:33:01 UTC
They are not at all related!


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