Introductory Circuit Analysis
13th Edition
ISBN: 9780133923919
Author: Boylestad, Robert L.
Publisher: Pearson Education
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Textbook Question
Chapter 14, Problem 25P
The reactance of a coil equals the resistance of a 10 k
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A coil has an inductance of 40 mH and negligible resistance. Calculate its inductive reactance and the resulting current if connected to (a) a 240V, 50 Hz supply, and (b) a 100V, 1 kHz supply
The resistance of a coil is 140 ohms and its inductance 0.85 H. Determine the current, the p.f. and the circuit impedance when the coil is connected to 120 V, 60 Hz supply.
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A coil has an inductance of 40 mH and negligible resistance. Calculate its inductive reactance and the resulting current if connected to (a) a 240V, 50 Hz supply, and (b) a 100V, 1 kHz supply
Chapter 14 Solutions
Introductory Circuit Analysis
Ch. 14 - Plot the following waveform versus time showing...Ch. 14 - Repeat Problem 1 for the following sinusoidal...Ch. 14 - What is the derivative of each of the following...Ch. 14 - The voltage across a 20 resistor is as indicated....Ch. 14 - The current through a 6.8 k ) resistor is as...Ch. 14 - Determine the inductive reactance (in ohms) of a 2...Ch. 14 - Determine the closest standard value inductance...Ch. 14 - Determine the frequency at which a 47 mH...Ch. 14 - The current through a 20 inductive reactance is...Ch. 14 - The current through a 0.1 H coil is given. What is...
Ch. 14 - The voltage across a 40 inductive reactance is...Ch. 14 - The voltage across a 0.2 H coil is given. What is...Ch. 14 - Determine the capacitive reactance (in ohms) of a...Ch. 14 - Determine the closest standard value capacitance...Ch. 14 - Determine the frequency at which a 3.9 F capacitor...Ch. 14 - The voltage across a 2.5 capacitive reactance is...Ch. 14 - The voltage across a 1 F capacitor is given. What...Ch. 14 - The current through a 2 k capacitive reactance is...Ch. 14 - The current through a 0.56 F capacitor is given....Ch. 14 - For the following pairs of voltages and currents,...Ch. 14 - Repeat Problem 20 for the following pairs of...Ch. 14 - Plot XL versus frequency for a 3 mH coil using a...Ch. 14 - Plot XC versus frequency for a 1 F capacitor using...Ch. 14 - At what frequency will the reactance of a 1 F...Ch. 14 - The reactance of a coil equals the resistance of a...Ch. 14 - Determine the frequency at which a 1 F capacitor...Ch. 14 - Determine the capacitance required to establish a...Ch. 14 - Find the average power loss and power factor for...Ch. 14 - If the current through and voltage across an...Ch. 14 - A circuit dissipates 100 W (average power) at 150...Ch. 14 - The power factor of a circuit is 0.5 lagging. The...Ch. 14 - In Fig.14.77, e=120sin(260t+20). a. What is the...Ch. 14 - In Fig. 14.78, e=220sin(1000t+60). a. Find the...Ch. 14 - In Fig. 14.79, i=30103sin(2500t20). a. Find the...Ch. 14 - For the network in Fig. 14.80 and the applied...Ch. 14 - For the network in Fig. 14.81 and the applied...Ch. 14 - Convert the following from rectangular to polar...Ch. 14 - Convert the following from rectangular to polar...Ch. 14 - Convert the following from polar to rectangular...Ch. 14 - Convert the following from polar to rectangular...Ch. 14 - Perform the following additions in rectangular...Ch. 14 - Perform the following subtractions in rectangular...Ch. 14 - Perform the following operations with polar...Ch. 14 - Perform the following multiplications in...Ch. 14 - Perform the following multiplications in polar...Ch. 14 - Perform the following divisions in polar form:...Ch. 14 - Perform the following divisions, and leave the...Ch. 14 - Perform the following operations, and express your...Ch. 14 - Prob. 49PCh. 14 - Determine a solution for x and y if...Ch. 14 - Determine a solution for x and y if...Ch. 14 - Express the following in phasor from:...Ch. 14 - Express the following in phasor form:...Ch. 14 - Express the following phasor currents and voltages...Ch. 14 - For the system in Fig. 14.82, find the sinusoidal...Ch. 14 - For the system in Fig. 14.83 find the sinusoidal...Ch. 14 - Find the sinusoidal expression for the voltage Ua...Ch. 14 - Find the sinusoidal expression for the current i1...Ch. 14 - Plot icandUc versus time for the network in Fig....Ch. 14 - Plot the magnitude and phase angle of the current...Ch. 14 - Plot the total impedance of the configuration in...
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- Assume that the voltage drop across the resistor, ER, is 78 V, that the voltage drop across the inductor, EL, is 104 V, and the circuit has a total impedance, Z, of 20 . The frequency of the AC voltage is 60 Hz. ETITZ20VAPFER78VIRRPEL104VILXLVARsLLarrow_forwardAssume that the voltage drop across the resistor, ER, is 78 V; the voltage drop across the capacitor, EC, is 104 V; and the circuit has a total impedance, Z, of 20 . The frequency of the AC voltage is 60 Hz. Find the missing values. ET ER78V EC104V IT IR IC Z20 R XC VA P VARSC PF Carrow_forwardThe circuit is connected to a 60-Hz line. The apparent power in the circuit is 29.985 VA, and the power factor is 62.5%. The resistor has a voltage drop of 14.993 V, the inductor has an inductive reactance of 60 , and the capacitor has a capacitive reactance of 45 . ETITZVA29.985PF62.5%ER14.993VIRRPELILXL60VARsLLECICXC45VARsCCarrow_forward
- Inductive Circuits Fill in all the missing values. Refer to the following formulas: XL=2fLL=XL2ff=XL2L Inductance (H) Frequency (Hz) Inductive Reactance ( ) 1.2 60 0.085 213.628 1000 4712.389 0.65 600 3.6 678.584 25 411.459 0.5 60 0.85 6408.849 20 201.062 0.45 400 4.8 2412.743 1000 40.841arrow_forwardA coil RL is connected in series with a capacitor across the 220 V, 60 hz, AC supply. If this circuit operates at 0.87 pf leading, determine the magnitude of this voltage, Assume voltage acrros the coil and the caapacitor are equal.arrow_forwardL:57) A coil having an inductance of 0.01 H and resistance of 5 ohm is connected in parallel with a capacitance of 100 microfarad. If the supply voltage is 220 V and its frequency is 60 Hz, calculate: The reactive power absorbed by the coil The reactive power generated by the capacitor The active power absorbed by the coil.arrow_forward
- Calculate the inductive reactance of a 0.9-μH coil at 800 MHz.arrow_forwardAn inductor coil with an inductance of 0.5 H and negligible resistance is connected across the terminals of a 230 V, 60 Hz supply. Determine the current in amperes taken by the inductor coil. What power in watts is taken by this inductor coil if the current lags the impressed voltage by 90 electrical degreesarrow_forwardThe impedance coil absorbs 250 watts when connected across 220 V, 60 Hz mains, it is then connected across 110 V, 25 Hz mains and also absorbs 250 watts. What is the inductance of the coil? Show complete solution.arrow_forward
- A coil draws 1875 watts when connected to a 165 V dc source. It consumes 3072 watts when use on a 240 V, 60 Hz ac source. Find the inductance of the coil. Ans: ____ mHarrow_forwardA coil has a reactance of 320 ohms in a circuit with a supply of frequency 20 kHz. Determine the inductance of the coil. Inductance in mH=arrow_forwardA coil has a resistance of 4 ohm and an inductance of 9.55 mH. Calculate the reactance, the impedance, and the current taken from a 240V, 50 Hz supply. Determine also the phase angle between the supply voltage and current.arrow_forward
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