What stays the same when a circuit is driven at its reasonant frequency as compared to when it is driven at any other frequency?
These are the choices:
Impedance, Current, XL, XC,
Linear Frequency, Angular Frequency,
All of These, None of These
2007-11-03 11:21:49 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
2nd answer doesn't jibe with my understanding of LC ccts. Assuming the cct is driven by a source with finite nonzero impedance, I and E will both vary as you move through resonance. At resonance a series LC has 0 reactance (and a huge voltage at the junction) and a parallel LC has infinite reactance (and a huge circulating current), so in both cases the impedance will be the resistance of R. This isn't true at any other frequency. So "none" is correct.
2007-11-03 12:15:22 · answer #1 · answered by kirchwey 7 · 0⤊ 1⤋
The impedance of an RLC circuit is a function of frequency (in the L and C nodes, because XL=2Pi*f*L, and XC=1/(2Pi*f*C)). The current however ( as long as you're talking about the total current in the circuit) will be a constant. Linear and angular frequencies obviously change when frequencies change.
2007-11-03 11:51:46 · answer #2 · answered by Not Eddie Money 3 · 0⤊ 1⤋
none of these
2007-11-03 11:46:39 · answer #3 · answered by edward 5 · 0⤊ 1⤋