Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Question
Chapter 11, Problem 52E
(a)
To determine
Find the power factor of the source when the
(b)
To determine
Find the apparent power supplied by the source.
(c)
To determine
Find the reactive power delivered by the source.
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For the circuit of Fig.11.78 composed of standard values:
A. Determine the time constant.
B. Write the mathematical expression for the current It after the switch is closed
C. Repeat part (b) for VL and VR
D. Determine il and VL at one three- and five-time constants.
E. Sketch the waveforms of iL,VL and VR.
An alternating voltage given by v = 120 sin (240t + п / 4) V, is applied to a coil withnegligible resistance and inductance of 100 mH. Determine (a) the reactance of thecoil, and (b) the RMS current flowing through the circuit.
Chapter 11 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
Ch. 11.1 - A current source of 12 cos 2000t A, a 200 ....Ch. 11.2 - Given the phasor voltage across an impedance ,...Ch. 11.2 - Prob. 3PCh. 11.2 - Prob. 4PCh. 11.2 - A voltage source vs is connected across a 4...Ch. 11.3 - If the 30 mH inductor of Example 11.7 is replaced...Ch. 11.4 - Calculate the effective value of each of the...Ch. 11.5 - For the circuit of Fig. 11.16, determine the power...Ch. 11.6 - Prob. 10PCh. 11 - Prob. 1E
Ch. 11 - Determine the power absorbed at t = 1.5 ms by each...Ch. 11 - Calculate the power absorbed at t = 0, t = 0+, and...Ch. 11 - Three elements are connected in parallel: a 1 k...Ch. 11 - Let is = 4u(t) A in the circuit of Fig. 11.28. (a)...Ch. 11 - Prob. 6ECh. 11 - Assuming no transients are present, calculate the...Ch. 11 - Prob. 8ECh. 11 - Prob. 9ECh. 11 - Prob. 10ECh. 11 - The phasor current I=915mA (corresponding to a...Ch. 11 - A phasor voltage V=10045V (the sinusoid operates...Ch. 11 - Prob. 13ECh. 11 - Prob. 14ECh. 11 - Find the average power for each element in the...Ch. 11 - (a) Calculate the average power absorbed by each...Ch. 11 - Prob. 17ECh. 11 - Prob. 18ECh. 11 - Prob. 19ECh. 11 - The circuit in Fig. 11.36 has a series resistance...Ch. 11 - Prob. 21ECh. 11 - Prob. 22ECh. 11 - Prob. 23ECh. 11 - Prob. 24ECh. 11 - Prob. 25ECh. 11 - Prob. 26ECh. 11 - Prob. 27ECh. 11 - Prob. 28ECh. 11 - Prob. 29ECh. 11 - Prob. 30ECh. 11 - Prob. 31ECh. 11 - Prob. 32ECh. 11 - Prob. 33ECh. 11 - (a) Calculate both the average and rms values of...Ch. 11 - Prob. 35ECh. 11 - FIGURE 11.43 Calculate the power factor of the...Ch. 11 - Prob. 37ECh. 11 - Prob. 38ECh. 11 - Prob. 40ECh. 11 - Prob. 41ECh. 11 - Prob. 42ECh. 11 - Prob. 43ECh. 11 - Compute the complex power S (in polar form) drawn...Ch. 11 - Calculate the apparent power, power factor, and...Ch. 11 - Prob. 46ECh. 11 - Prob. 48ECh. 11 - Prob. 49ECh. 11 - Prob. 50ECh. 11 - Prob. 51ECh. 11 - Prob. 52ECh. 11 - FIGURE 11.49 Instead of including a capacitor as...Ch. 11 - Prob. 54ECh. 11 - A load is drawing 10 A rms when connected to a...Ch. 11 - For the circuit of Fig. 11.50, assume the source...Ch. 11 - Prob. 57ECh. 11 - A source 45 sin 32t V is connected in series with...Ch. 11 - Prob. 60ECh. 11 - FIGURE 11.51 The circuit in Fig. 11.51 uses a Pi...Ch. 11 - Prob. 62ECh. 11 - Prob. 63ECh. 11 - You would like to maximize power transfer to a 50 ...
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Similar questions
- Example 11.55. The voltage across a 0.01 μF capacitor is 240 sin (1-25 × 10ª t−30%) V. Write the mathematical expression for the current through it.arrow_forwardEXAMPLE 11.7 Switch S, in Fig. 11.51 has been closed for a long time. At 1 = 0 s, S, is opened at the same instant that S, is closed to avoid an interruption in current through the coil. a. Find the initial current through the coil. Pay particular attention to its direction. b. Find the mathematical expression for the current i, following the closing of switch S,. c. Sketch the waveform for i,. 486 ||| INDUCTORS S (t 0 s) (1 = 0 s) R2 8.2 k I kN 12 mA R, = 2.2 k2 680 mH E 6 V o 000arrow_forward11.51 For the entire circuit in Fig. 11.70, calculate: (c) the reactive power (d) the apparent power (e) the complex power 22 -j5 2 j6 2 16/45° V 10Ω 8Ω ele wwarrow_forward
- 7. Calculate the value of the resistor(R) that must be connected in parallel with a gµF capacitor(C) to produce a power factor equivalent to o.75 when connected to a 60 Hz AC source.arrow_forward1. With a neat sketch briefly explain how an alternating voltage is produced when a coil is rotated in a magneticfield. 2. Derive expressions for average value and RMS value of a sinusoidally varying AC voltage 3. A circuit having a resistance of 12Ω, an inductance of 0.15 H and a capacitance of 100μf in series is connectedacross a 100V, 50Hz supply. Calculate the impedance, current, the phase difference between the current andsupply voltage. 4. Two circuits with impedances of Z1 = 10 + j15Ω and Z2 = 6 – j8Ω are connected in parallel. If the supply current is 20A, what is the power dissipated in each branch?arrow_forwardA sinusoidal alternating voltage of effective value of 250 V and a frequency of 60 hz. It crosses the zero axis in a positive direction when t=0. Determine a) the instantaneous value of voltage after 12.45 msec; b) the time taken to reach 275 V after a period; c) the time to reach a value of 300 V after a passing through maximum positive value.arrow_forward
- b) Find the rms current flowing in an AC capacitive circuit when a 4μF capacitor is connected across a 880V, 60Hz supply.arrow_forwardA 50 uF capacitor is connected across a 230V, 50Hz supply. Calculate a) the reactance offered by the capacitor, b) the maximum current, and c) the rms value of the current drawn by the capacitor.arrow_forwardFor your answers, write out the units (i.e. millivolt). For the circuit shown in Figure 11 below, calculate: a. The capacitive reactance: b. The total impedance: c. The total current: d. The voltage across the capacitor: e. The voltage across the resistance: f. The phase angle between the output and the input voltage: 43 F Partly cloudy 10 N /= 1.5 kHz 0.01 uF -|- Figure 11 1k O Search Your LOLarrow_forward
- Three equal star-connected inductors take 8 W at a power factor of 0.8 lagging when connected across a 460 V, three phase, three wire supply. Determine the following: (d) The impedance in ohm of each coil. (Polar form) (e) The value of the resistance in ohm of each coil. (f) The value of the reactance in ohm of each coil.arrow_forwardDetermine the values of the resistance and the series-connected inductance or capacitance for each of the following impedances: (a) (12 + j5) ohm (b) −j40 ohm (c) 30∠60◦ ohm (d) 2.20 × 106∠−30◦ ohm. Assume for each a frequency of 50 Harrow_forwardAn inductive coil draws 10 A current and consumes 1 kW power from a 200 V, 50 Hz ac supply. Determine: (i) impedance (ii) power factor (iii) reactive and apparent power.arrow_forward
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