Delmars Unit 23 Resistive-Inductive-Capacitive Series Circuits

An RLC series circuit has an applied voltage of 240 volts. R = 48 Ω , X L = 100 Ω , XC = 36 Ω , and Z = 80 Ω . What is the reactive power of the inductor? 720 VARs 644 VARs 808 VARs 900 VARs

900 VARs

An RLC series circuit has an applied voltage of 240 volts. R = 48 Ω , X L = 100 Ω , XC = 36 Ω , and Z = 80 Ω . What is the total current? 3 A 4 A 2 A 1 A

3 A

An RLC series circuit has an applied voltage of 240 volts. R = 48 Ω , X L = 100 Ω , XC = 36 Ω , and Z = 80 Ω . What is the reactive power of the capacitor? 100 VARs 520 VARs 324 VARs 208 VARs

324 VARs

If the current leads the voltage in an RLC series circuit, the power factor is referred to as _____. leading lagging

leading

Which of these formulas would be used to determine resonant frequency?

FR =

An RLC series circuit has R = 56 Ω , X L = 64 Ω , and X C = 37 Ω . What is the value of Z? 62.17 Ω 25.49 Ω 59 Ω 43 Ω

25.49 Ω

An RLC series circuit has an applied voltage of 240 volts. R = 48 Ω and the voltage across it is 96 V. What is the circuit power factor? 50% 20% 10% 40%

40%

When Ohm's law is applied to the RLC series circuit values, the voltage drops developed across the inductor or capacitor can be lower than the applied voltage. True False

False

Which of these formulas would be used to determine the resonant value of inductance?

L=

In an RLC series circuit, as frequency increases, inductive reactance increases and capacitive reactance decreases. False True

True

The impedance of the RLC series circuit is the sum of resistance, inductive reactance, and capacitive reactance. True False

True

Which of these formulas would be used to determine bandwidth?

b=

The difference between the two frequencies at which the current is 0.707 of the maximum current value is the _____. bandwidth power factor quality resonance

bandwidth

Inductive and capacitive reactance _______ each other at resonance. attract cancel detract add

cancel

During the period of time that the circuit is not at resonance, what is limited by the combination of inductive reactance and capacitive reactance? resistance current flow frequency current circuit

current flow

In an RLC series circuit, _____ is the same through all components and the _____ are out of phase. current; voltages voltage; currents

current; voltages

When calculating resonant frequency, in what units is inductance measured? hertz farads picofarads henrys

henrys

When determining bandwidth, what components result in a sharp increase and decrease of current? high-frequency components low-frequency components high-frequency components high-Q components

high-Q components

If an RLC series circuit contains more inductive VARs than capacitive VARs, the circuit has a _____ power factor. lagging leading

lagging

If the voltage in an RLC series circuit is ahead of the current, the power factor is referred to as _____. lagging leading

lagging

If an RLC series circuit contains more capacitive VARs than inductive VARs, then the circuit has a _____ power factor. leading lagging

leading

In an RLC series circuit, the point at which X L and X C are equal is called _____. equality inductance bandwidth resonance

resonance

What type of circuits are used to provide great increases of current and voltage at the resonant frequency? series parallel resonant combination

resonant

25. Because inductive reactance and capacitive reactance are 180° degrees out of phase with each other, they __________from each other in an AC circuit. divide add multiply subtract

subtract

Because inductive and reactance and capacitive reactance are 180° out of phase with each other in an RLC series circuit, mathematical addition must be used to find their sum. False True

False

When using vector addition for inductive reactance and capacitive reactance, the larger value is reduced by the amount of the smaller value. False True

True

When using vector addition for inductive reactance and capacitive reactance, the smaller value is eliminated. False True

True

When determining bandwidth, what does Q represent? quality of the capacitor quality of frequency quality of bandwidth quality of bandwidth

quality of bandwidth

An RLC series circuit is powered by a 120-V, 60-Hz supply. It contains an inductor that has an inductive reactance of 50 Ω and a wire resistance of 10 Ω. What is the inductance of the inductor? 0.335 H 0.259 H 0.133 H 0.0265 H

0.133 H

An RLC series circuit has an applied voltage of 120 volts. R = 42 Ω , X L = 80 Ω , and X C = 24 Ω . What is the true power? 123.43 W 18 W 60 W 42.86 W

123.43 W

Because inductive reactance and capacitive reactance are _____ out of phase with each other, they subtract from each other in an AC circuit. 90° 180°

180°

Which of these formulas would be used to determine the resonant value of capacitance?

C=

What type of circuit is depicted in the above image? RLC parallel RLC series RLC combination

RLC series

Subtraction of the inductive reactance and capacitive reactance in an RLC series circuit, permits the impedance of the circuit to become less than either or both of the reactances. False True

True

When calculating resonant frequency, in what units is capacitance measured? henrys picofarads farads hertz

farads

What can be determined when the values of inductance and capacitance are known? frequency of resonance bandwidth resistance resistive current

frequency of resonance

If the voltage is behind the current in an RLC series circuit, the power factor is referred to as _____. leading lagging

leading

In an RLC series circuit, the ratio of resistance, inductance, and capacitance determines how much the applied _____ leads or lags the circuit current. amperage impedance voltage wattage

voltage

An RLC series circuit has an applied voltage of 240 volts. R = 51 Ω , X L = 100 Ω , and X C = 32 Ω . The voltage drop across the inductor is 282 V. What is the voltage drop on the resistor? 192.73 V 422.4 V 143.82 V 382.5 V

143.82 V

An RLC series circuit is powered by a 120-V, 60-Hz supply. It contains a capacitor that has an X L of 50 Ω . What is the capacitance of the capacitor? 53.05 μ F 106.1 μ F 265.25 mF 132.63 mF

53.05 μ F

An RLC series circuit has R = 42 Ω , X L = 80 Ω , and X C = 24 Ω . What is angle theta? 36.87° 62.33° 53.13° 59.74°

53.13°

An RLC series circuit has an applied voltage of 277 volts. The current through the resistor is 3.5 A. What is the apparent power of the circuit? 790.14 VA 969.5 VA 210.92 VA 220.61 VA

969.5 VA

An RLC series circuit has an applied voltage of 240 volts. R = 48 Ω , X L = 100 Ω , XC = 36 Ω , and Z = 80 Ω . What is the voltage drop across the capacitor? 40 V 108 V 300 V 444 V

108 V

Because inductive reactance and capacitive reactance are _____ out of phase with each other, they subtract from each other in an AC circuit. 180° 90°

180°

An RLC series circuit has an applied voltage of 240 volts. R = 48 Ω , X L = 100 Ω , XC = 36 Ω , and Z = 80 Ω . What is the voltage drop across the inductor? 140 V 344 V 300 V 208 V

300 V

When calculating resonant frequency, what does the value L represent? capacitance inductance frequency at resonance impedance

inductance