Unit 22 quiz
Power factor (PF) is the ratio of the _____ power to the _____ power.
Apparent; true
In a series RC circuit, apparent power can be calculated by _____.
Et x 1
In a capacitive circuit, the voltage leads the current by 90 electric degrees.
False
You connect a clamp-on ammeter and a voltmeter to a series RC circuit powered by a 60-Hz circuit. The voltage reads 240 V and the current is 0.715 A. The resistor is 150 Ω. What is the true power?
153.36 W
A series RC circuit contains two resistors and two capacitors. The resistors are 120 Ω and 470 Ω. The capacitors have capacitive reactances of 600 Ωand 300 Ω. When calculating the circuit values, what is the total capacitive reactance?
900 ohms
A series RC circuit contains two resistors and two capacitors. The resistors are 39 Ω and 56 Ω. The capacitors have capacitive reactances of 80 Ω and 40 Ω. When calculating the circuit values, what is the total resistance?
95 ohms
In a series RC circuit, total impedance is a combination of resistance and capacitive reactance.
True
Of the different power values in an RC circuit, which is known as apparent power?
VA
Dividing a circuit's total applied voltage by the total impedance results in the total _____.
current
The _____ of a circuit is the cosine of the phase angle.
power factor