Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and a 19-picofarad capacitor at 21.200 MHz?
AnswerPoint 1
At 21.200 MHz, a 19-picofarad capacitor has about 395 ohms of capacitive reactance. The impedance is about 300 - j395 ohms, corresponding to Point 1 on Figure E5-1.