Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Chapter 11, Problem 56E
For the circuit of Fig. 11.50, assume the source operates at a frequency of 100 rad/s. (a) Determine the PF at which the source is operating. (b) Calculate the apparent power absorbed by each of the three passive elements. (c) Compute the average power supplied by the source. (d) Determine the Thévenin equivalent seen looking into the terminals marked a and b, and calculate the average power delivered to a 100 Ω resistor connected between the same terminals.
■ FIGURE 11.50
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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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- The average load of a dairy plant at 11 kV, 50 Hz is 950 kW at 80 percent power factor but the maximum contract load of plant is 1200 kW. As per local electricity regulating authorities norms, consumer must keep the power factor of 95 percent to avoid any poor power factor penalty. Determine the following (i) Rating of capacitor bank (in kVAr) (ii) The capacitance of the capacitor bank (in micro Farad) (iii) Explain why the power factor becomes low and how the capacitor bank will assists to improve the power factor?arrow_forward(c) A 240 V rms 50 Hz supply serves four resistive loads that is 10 kW each, an inductive load of 75 kVAR and a 45 kVAR capacitive load. Calculate : (i) The current drawn from the supply. (ii) The KVAR rating and capacitance required to improve the power factor to 0.95 lagging. (iii) The current drawn from the supply after power factor correction.arrow_forwardSection 11.8 Power Factor Correction 11.69 Refer to the circuit shown in Fig. 11.88. (a) What is the power factor? (b) What is the average power dissipated? (c) What is the value of the capacitance that will give a unity power factor when connected to the load? 120 V rms Z 10 +j122 60 Hzarrow_forward
- 11.19 The variable resistor R in the circuit of Fig. 11.50 is adjusted until it absorbs the maximum average power. Find R and the maximum average power absorbed. j1Ω 3 Figure 11.50 For Prob. 11.19. 392 www 4/0° A wwww -j2Q2 692 Rarrow_forwardThe maximum instantaneous voltage and current output of an alternator are 300 V and 20 A, respectively. What is the reactive power output in watts if the voltage leads the current by 30°? Ans: kVar 2.598arrow_forwardb) A 250V is used to supply a 20kW load at 50HZ with leading power factor of 0.75. Determine the following : ii. State whether this load is generating or consuming reactive power.arrow_forward
- 11.51 For the entire circuit in Fig. 11.70, calculate: (a) the power factor (b) the average power delivered by the source (c) the reactive power (d) the apparent power (e) the complex power 50/50° V (+) Figure 11.70 For Prob. 11.51. 292 www ww -j5Q 10 92 ele j6 Ω 892arrow_forwardA resistor of 10ohm and an inductor of 0.2 henry are connected in series and given a supply of 230 V, 50 Hz, then (i) Inductive reactance (ii) Impedance (iii) Current (iv) Power factor (v) True power (vi) Reactive power and (vii) find the apparent powerarrow_forwardAn alternating voltage is given by v = 278.6 sin 324t volts. Find the instantaneous value of voltage when t = 10ms. Two 650 mH coils have a coefficient of coupling equal to 0.45. Calculate the value of mutual inductance.arrow_forward
- For the circuit of Fig. 11.50, assume the source operates at a frequency of 100 rad/s. (a) Determine the PF at which the source is operating. (b) Cal- culate the apparent power absorbed by each of the three passive elements. (c) Compute the average power supplied by the source. (d) Determine the Thévenin equivalent seen looking into the terminals marked a and b, and calculate the average power delivered to a 100 2 resistor connected between the same terminals. j60 92 ell FIGURE 11.50 w 50 2 5/0° A www 80 Ω 02 obarrow_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_forwardEach phase of a three-phase, delta-connected motor has a resistance of 15 and an inductance of 0,02 H. The motor has an efficiency of 77 %. It is supplied by a star-connected alternator having a phase voltage 220V at 50 Hz. Draw a complete circuit diagram. Calculate the motor phase currents and the motor output power. Also calculate the capacitance required to improve the power factor to 0, 93 lagging.arrow_forward
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