A 11.1 resistor,a 9.2 µF capacitor, anda 29.7 mH inductor are connectedin series

Question

A 11.1 resistor,a 9.2 µF capacitor, anda 29.7 mH inductor are connectedin series with a 120 V (rms) source with variable frequency. (a) At what frequency will the current be maximum?
Hz

(b) Find the maximum rms current.
A

(c) Suppose you now replace the 9.2 µF capacitor bya 20.8 µF capacitor. Whatis the new value of the rms current?
A (a) At what frequency will the current be maximum?
Hz

(b) Find the maximum rms current.
A

(c) Suppose you now replace the 9.2 µF capacitor bya 20.8 µF capacitor. Whatis the new value of the rms current?
A

Explanation / Answer

given that L = 29.7 * 10-3H C = 9.2* 10-6F R = 11.1    frequency = f = 1/2LC plug in values f = ------HZ Irms= 120Vrms/Z where Z = R2 +(2fL -1/2fC)2 plug in values Z = ----- Irms= Vrms/Z = ----A simillarly C values change as 20.8 * 10-6 Ffor caliculationg Z and then Irms= Vrms/Z =----A plug in values Z = ----- Irms= Vrms/Z = ----A simillarly C values change as 20.8 * 10-6 Ffor caliculationg Z and then Irms= Vrms/Z =----A

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