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#1 Posted 1:25pm 28-02-10 EMan emf of V = 150 cos 377t is applied to a pure resistor of resistance 50 Ω . what is frequency of power variation |
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#2 Posted 1:48pm 28-02-10 Re: EMP = V[p]2[/p]/R P = [frac](150)[p]2[/p]cos [p]2[/p] 377t [/]50[/frac] P = 450 cos [p]2[/p] 377t P = 450( 1 + cos 2. 377t) P = 450 + 450cos 754t compare 450cos 754t with A cos wt we get w = 754 = 2pi/T. 1/T = 754/2pi = 120 Hz.
In every loss, in every lie, in every truth that you'd deny
And each regret and each goodbye was a mistake too great to hide
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