PHYS 1502Q Chapter Notes - Chapter 21: Umax Technologies, Root Mean Square, Power Factor
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Im = r (natural frequency of a lc circuit) Acts as if the resistor is the only other element in the circuit. Z is minimized xl = xc. Current through the resistor is in phase with the generator. Peak current is the current at the resonant frequency times the cosine of the phase. As q increases, the graph gets narrower. Energy is delivered to the circuit by the generator. Some energy is dissipated in the resistor, and some is stored and released in the capacitor and in the inductor. Average power delivered to the circuit by the generator in one complete cycle is equal to the average power dissipated in the resistor during one cycle. The inductor and capacitor contribute nothing to the average power in the circuit because averaging the power is averaging the product of a sine and cosine, which is 0 (cid:2065) resistor. P (cid:2065) generator (cid:2066) (cid:2066) i cos .
