Delmars Unit 21 Resistive-Capacitive Series Circuits

A series RC circuit has two resistors and two capacitors. The resistors dissipate 9 W and 15 W. The capacitive powers are 18 VARs and 9 VARs. The applied voltage is 277 V. What is the circuit current? 130.4 mA 7.67 mA 7.67 A 130.4 A

130.4 mA

In a series RC circuit, ET = 240 V, R = 30 Ω, and XC = 40 Ω. What is the apparent power? 921.6 VA 1152 VA 691.2 VA 168.2 VA

1152 VA

In a series RC circuit, ET = 240 V, R = 40 Ω, and XC = 30 Ω. What is EC? 144 V 37.14 V 62.86 V 92 V

144 V

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? 111.6 W 153.36 W 192 W 335.66 W

153.36 W

In a series RC circuit, ET = 240 V, R = 150 Ω, and XC = 270 Ω. What is the reactive power? 190.56 VARs 126.48 VARs 163 VARs 253.56 VARs

163 VARs

A series RC circuit contains two resistors and two capacitors. The resistors are 82 Ω and 47 Ω. The capacitors have capacitive reactances of 80 Ω and 50 Ω. What is the total impedance? 84.75 Ω 14.56 Ω 68.62 Ω 183.14 Ω

183.14 Ω

In a series RC circuit, ET = 240 V, R = 40 Ω, and XC = 30 Ω. What is ER? 144 V 157.14 V 202.86 V 192 V

192 V

In a series RC circuit, the resistor voltage is 124 V and the capacitor voltage is 167 V. What is the total voltage? 111 V 143 V 208 V 240 V

208 V

In a series RC circuit, ET = 240 V, R = 500 Ω, and XC = 500 Ω. What is the true power? 28.8 W 64.4 W 70.72 W 57.62 W

57.62 W

A series RC circuit has a resistance of 155 Ω and a capacitive reactance of 270 Ω. What is angle theta? 44.97° 60.14° 89.86° 55.03°

60.14°

A capacitor that has an XC of 40 Ω is connected to a 60 Hz voltage. What is the capacitance? 100.52 μF 99.48 μF 66.31 μF 75.80 μF

66.31 μF

In a capacitive circuit, the voltage leads the current by 90 electric degrees.​ True False

True

Of the different power values in an RC circuit, which is known as apparent power? W VA VARs

VA

The _____ of a circuit is the cosine of the phase angle. VARs power factor watts volt-amperes

power factor

In a series RC circuit, apparent power can be calculated by _____. EC × I ER × I ET × I

ET × I

Dividing a circuit's total applied voltage by the total impedance results in the total _____. VA current power VARs

current

A series RC circuit contains two resistors and two capacitors. The resistors are 27 Ω and 56 Ω. The capacitors have capacitive reactances of 50 Ω and 40 Ω. What is angle theta? 72.68° 67.25° 52.75° 47.31°

47.31°

A series RC circuit contains two resistors and two capacitors. The resistors are 68 Ω and 56 Ω. The capacitors have capacitive reactances of 66 Ω and 33 Ω. The applied voltage is 240 V. What is the voltage drop on the 56 Ω resistor? 102.85 V 39.83 V 84.70 V 49.91 V

84.70 V

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 Ω and 300 Ω. When calculating the circuit values, what is the total capacitive reactance? 900 Ω 390 Ω 1000 Ω 1290 Ω

900 Ω

A series RC circuit contains two resistors and two capacitors. The resistors are 39 Ω and 68 Ω. The capacitors have capacitive reactances of 60 Ω and 50 Ω. The applied voltage is 240 V. What is the voltage drop on the capacitor that has 50 Ω of reactance? 260.99 V 178.2 V 93.84 V 106.35 V

93.84 V

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? 25 Ω 130 Ω 95 Ω 125 Ω

95 Ω

​In a series RC circuit, total impedance is a combination of resistance and capacitive reactance. True False

True

Power factor (PF) is the ratio of the _____ power to the _____ power. apparent; true true; apparent apparent; reactive reactive; apparent

apparent; true