L10: Multiple Reactance and RLC Circuits Flashcards
How can multiple series Capacitive Reactances alone be combined
How can multiple parallel Capacitive Reactances alone be combined
How can multiple series Inductive Reactances alone be combined
How can multiple parallel Inductive Reactances alone be combined
What happens with XL and XC in the same circuit
In a circuit with both XL and XC, the opposite phase angles enable one to offset the effect of the other.
When XL and XC are in series, what is the net reactance
For XL and XC in series, the net reactance is the difference between the two series reactances, resulting in less reactance than in either one.
What is the net reactive current in a parallel circuit
In parallel circuits, the net reactive current is the difference between the IL and IC branch currents, resulting in less total line current than in either branch current.
How can opposite Series Reactances be combined
How can opposite Parallel Reactances be combined (how is current related to applied voltage and what is the ZEQ)
What is an RLC Circuit
It is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C)
How can you make a phasor triangle out of an RLC Series Circuit
- First, add all series resistances for one total R
- Combine all series reactances, adding all XL’s and all XC’s and finding the net net X by subtraction
- Finally, the total R and net X can be added by phasor just like series RC circuit discussed earlier
How can you make a phasor triangle out of an RLC Parallel Circuit
How can the Real Power be found/calculated in an AC Circuit
- In an AC circuit with reactance, the current I supplied by the generator either leads or lags the generator voltage, V.
- The product VI is not the real power produced by the generator, since the instantaneous voltage may have a high value while at the same time the current is near zero, or vice versa.
- The real power in watts can always be calculated as I^2R, where R is the total resistive component of the circuit.
- Real Power: P = I^2R or P = VI cosø
How is the Power Factor calculated for Series and Parallel AC Circuits
How is Apparent Power calculated in an AC Circuit
Apparent Power = VI
The apparent power used by the circuit before the phase angle between V and I is considered
How is Reactive Power or Volt-Ampere Reactive (VAR) calculated
Reactive Power or Volt-Ampere Reactive (VAR) = VI sinø
