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A2 Physics | Post your doubts here

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A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be
frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V.
The frequency deviation of the carrier wave is 20 kHz V–1.
Describe, for the carrier wave, the variation (if any) of
A: amplitude
B: Frequency

can sum1 plz tell the answer of part B?? how to calculate the frequecy?
thanks! :)
frequency varies 20Khz V-1 . so total variation is 20 x 1.5 = 30KHz. max frequency is 530KHz and min frequency is 470kHz
 
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explain why it is necessary to make repeated amplifications of signal......
signal loose energy as it travels....so must be amplified in order to prevent the signal from being lost in the noise.....
In order that a signal may be detected adequately, its power must be a minimum number of times
greater than the power associated with noise.....this ratio is the signal to noise ratio
 
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Well, guys, I'm going to sleep now. Need to be fresh for tomorrow's exam! Thank you all for participating in this forum and teaching me some valuable tips to get me as ready as I can be for tomorrow's exam. May one and all do well in the exam and achieve your desired results! (y):p
 
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@smzimran
Thank you for pointing it out. I'll make sure that I will use the previous answers in my calculations.
Best of Luck brother! (y)
Btw, what is your location ?
If its Pakistan, isn't it too early to sleep? Not even Isha prayer time has come :D
 
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