help. a)define phasors b)sketch a phasor diagram for an RC circuit c)An ac gener

Question

help.
a)define phasors
b)sketch a phasor diagram for an RC circuit
c)An ac generator with an rms voltage of 35V is connected in series to a 14 ohm resistor, a 55mH inductor and a 63x10^-6 F capacitor.
-find resoance frquency
-the rms current
D)from c),state what happen to the voltage if frequency is lowered below resonance frequency?

help. a)define phasors b)sketch a phasor diagram for an RC circuit c)An ac generator with an rms voltage of 35V is connected in series to a 14 ohm resistor, a 55mH inductor and a 63x10^-6 F capacitor. -find resoance frquency -the rms current D)from c),state what happen to the voltage if frequency is lowered below resonance frequency?

Explanation / Answer

A. a phasor is a rotating vector

c. a, at resonance W^2 = 1/LC

W^2 = 1/(0.055 * 63 e-6)

W^2 = 288600.288

W = 537.12 rad/s

as W = 2pif   = 537.12

f = 85.54 Hz

-----------------

at resonance Z = R   ( as XL = Xc)

so

irms = Vrms/Z

irms = 35/14

irms = 2.5 Amps

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