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Part A - Power and power factor for parallel loads I Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S = 100 kVA at a leading power factor of pfi = 0.75. Load #2 (L2) absorbs Sz = 70 kVA at a lagging power factor of pf2 = 0.88. Use this information to calculate the real (P) and reactive (Q) power provided by the V, - 225 V-rms 60 Hz source and its power factor (Pf). Express your answers numerically to three significant figures separated by commas. > View Available Hint(s) ? P.Q. pf = kW, KVAR, no unit Submit Part B - Power for a parallel load with a transmission line impedance Consider the circuit in (Figure 2). The load (L1) absorbs P = 10 W and Q = 30 VAR of power. Use this information to calculate complex power provided by the source if the voltage across the load is V. - 475 V-rms 60 Hz source and the impedance of the transmission line is 0.045 + J(0.050) 2. Express your answer in rectangular complex form to three significant figures. > View Available Hint(s) VA Submit Part C - Power factor correction Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S= 43 VA at a lagging power factor of pf = 0.58. Load 2 (L2) absorbs P = 94 W and Q2 = -43 VAR of power. If these loads are powered by a V- 350 V-rms. 80-Hz source, what impedance needs to be added to the circuit in order to raise the source's power factor to unity? Express your answer in rectangular complex form to three significant figures. > View Available Hint(s) vec ? Z =

Part A - Power and power factor for parallel loads I Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S = 100 kVA at a leading power factor of pfi = 0.75. Load #2 (L2) absorbs Sz = 70 kVA at a lagging power factor of pf2 = 0.88. Use this information to calculate the real (P) and reactive (Q) power provided by the V, - 225 V-rms 60 Hz source and its power factor (Pf). Express your answers numerically to three significant figures separated by commas. > View Available Hint(s) ? P.Q. pf = kW, KVAR, no unit Submit Part B - Power for a parallel load with a transmission line impedance Consider the circuit in (Figure 2). The load (L1) absorbs P = 10 W and Q = 30 VAR of power. Use this information to calculate complex power provided by the source if the voltage across the load is V. - 475 V-rms 60 Hz source and the impedance of the transmission line is 0.045 + J(0.050) 2. Express your answer in rectangular complex form to three significant figures. > View Available Hint(s) VA Submit Part C - Power factor correction Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S= 43 VA at a lagging power factor of pf = 0.58. Load 2 (L2) absorbs P = 94 W and Q2 = -43 VAR of power. If these loads are powered by a V- 350 V-rms. 80-Hz source, what impedance needs to be added to the circuit in order to raise the source's power factor to unity? Express your answer in rectangular complex form to three significant figures. > View Available Hint(s) vec ? Z =

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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I Review | Constants Learning Goal: In this tutorial, you will practice the calculation of power in circuits containing loads, including the effects of non-ideal transmission lines, and practice how to improve the power factor for an entire system. Part A - Power and power factor for parallel loads I Many appliances (e.g. hair dryers, coffee makers, and refrigerators) and industrial loads are powered by AC sources. The ability to be able to calculate their power needs is important in a number of situations. Before completing this tutorial, make sure you are familiar with the relationships between average, reactive, and apparent power and the power factor. Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S1 = 100 kVA at a leading power factor of pfi = 0.75. Load #2 (L2) absorbs S2 = 79 kVA at a lagging power factor of pf2 = 0.88. Use this information to calculate the real (P) and reactive (Q) power provided by the V, = 225 V-rms 60 Hz source and its power factor (pf). Express your answers numerically to three significant figures separated by commas. • View Available Hint(s) VOAEd t vec ? P.Q. pf = kW, KVAR, o unit Submit Part B - Power for a parallel load with a transmission line impedance Consider the circuit in (Figure 2). The load (L1) absorbs P = 10 W and Q = 36 VAR of power. Use this information to calculate complex power provided by the source if the voltage across the load is Vz = 475 V- Ims 60 Hz source and the impedance of the transmission line is 0.045 + j(0.050) 52. Express your answer in rectangular complex form to three significant figures. > View Available Hint(s) Vo AEo | t vec ? S= VA Submit Figure K 1 of 2 Part C - Power factor correction Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S = 43 VÀ at a lagging power factor of pf = 0.58. Load #2 (L2) absorbs P = 94 W and Q2 = -43 VAR of power. If these loads are powered by a V = 350 V-rms, 60-Hz source, what impedance needs to be added to the circuit in order to raise the source's power factor to unity? Express your answer in rectangular complex form to three significant figures. > View Available Hint(s) V() L1 L2 Vo|AEo It Tvec ΑΣφ Z =
Transcribed Image Text:I Review | Constants Learning Goal: In this tutorial, you will practice the calculation of power in circuits containing loads, including the effects of non-ideal transmission lines, and practice how to improve the power factor for an entire system. Part A - Power and power factor for parallel loads I Many appliances (e.g. hair dryers, coffee makers, and refrigerators) and industrial loads are powered by AC sources. The ability to be able to calculate their power needs is important in a number of situations. Before completing this tutorial, make sure you are familiar with the relationships between average, reactive, and apparent power and the power factor. Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S1 = 100 kVA at a leading power factor of pfi = 0.75. Load #2 (L2) absorbs S2 = 79 kVA at a lagging power factor of pf2 = 0.88. Use this information to calculate the real (P) and reactive (Q) power provided by the V, = 225 V-rms 60 Hz source and its power factor (pf). Express your answers numerically to three significant figures separated by commas. • View Available Hint(s) VOAEd t vec ? P.Q. pf = kW, KVAR, o unit Submit Part B - Power for a parallel load with a transmission line impedance Consider the circuit in (Figure 2). The load (L1) absorbs P = 10 W and Q = 36 VAR of power. Use this information to calculate complex power provided by the source if the voltage across the load is Vz = 475 V- Ims 60 Hz source and the impedance of the transmission line is 0.045 + j(0.050) 52. Express your answer in rectangular complex form to three significant figures. > View Available Hint(s) Vo AEo | t vec ? S= VA Submit Figure K 1 of 2 Part C - Power factor correction Consider the two loads in the circuit in (Figure 1). Load #1 (L1) absorbs S = 43 VÀ at a lagging power factor of pf = 0.58. Load #2 (L2) absorbs P = 94 W and Q2 = -43 VAR of power. If these loads are powered by a V = 350 V-rms, 60-Hz source, what impedance needs to be added to the circuit in order to raise the source's power factor to unity? Express your answer in rectangular complex form to three significant figures. > View Available Hint(s) V() L1 L2 Vo|AEo It Tvec ΑΣφ Z =
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