Amateur Extra · FCC ELEMENT 4

E5B08

Amateur Extra · FCC Element 4 · answer reveals automatically

What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 300 ohms, R is 100 ohms, and XL is 100 ohms?

Answer63 degrees with the voltage lagging the current

Net reactance is 100 - 300 = -200 ohms. arctan(-200/100) is about -63 degrees, so the voltage lags the current by about 63 degrees.