A. Answer 5 TEST YOURSELF1. The load taken from a supply consists of (a) lamp load 10 kW a unity power factor (b) motorload of 80 kVA at 0.8 power factor lagging and (c) motor load of 40 kVA at 0.7 power factorleading. Calculate the total load taken from the supply in kW and in kVA and the power factorof the combined load.2. A 3.73 kW, 1-phase, 200-V motor runs at an efficiency of 75% with a power factor of 0.7lagging. Find (a) the real input power (b) the kVA taken (c) the reactive power and (d) thecurrent.3. An inductive circuit draws 10 A and 1 kW from a 200-V, 50 Hz a.c. supply. Determine: (i) theimpedance in Cartesian from (a + jb) (ii) the impedance in polar from Z Z 0 (iii) the powerfactor (iv) the reactive power (v) the apparent power.4. A resistance of 20 ohms, inductance of 0.2 H and capacitance of 150 µF are connected in seriesand are fed by a 230 V, 50 Hz supply. Find X₁, Xc, Z, Y, p.f., active power and reactive power.5. Given v = 200 sin 377t V and i = 8 sin (377t-30°) A for an ac circuit. Determine (a) the powerfactor, (b) true power, (c) apparent power, and (d) reactive power.

Answered: Image /qna-images/answer/5c72b2b2-1892-4bef-a29d-3f19a5bb97fc.jpg

Answered: 5. Given v = 200 sin 377t V and i = 8…

5. Given v = 200 sin 377t V and i = 8 sin (377t-30°) A for an ac circuit. Determine (a) the power factor, (b) true power, (c) apparent power, and (d) reactive power.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Question

A. Answer 5

TEST YOURSELF
1. The load taken from a supply consists of (a) lamp load 10 kW a unity power factor (b) motor
load of 80 kVA at 0.8 power factor lagging and (c) motor load of 40 kVA at 0.7 power factor
leading. Calculate the total load taken from the supply in kW and in kVA and the power factor
of the combined load.
2. A 3.73 kW, 1-phase, 200-V motor runs at an efficiency of 75% with a power factor of 0.7
lagging. Find (a) the real input power (b) the kVA taken (c) the reactive power and (d) the
current.
3. An inductive circuit draws 10 A and 1 kW from a 200-V, 50 Hz a.c. supply. Determine: (i) the
impedance in Cartesian from (a + jb) (ii) the impedance in polar from Z Z 0 (iii) the power
factor (iv) the reactive power (v) the apparent power.
4. A resistance of 20 ohms, inductance of 0.2 H and capacitance of 150 µF are connected in series
and are fed by a 230 V, 50 Hz supply. Find X₁, Xc, Z, Y, p.f., active power and reactive power.
5. Given v = 200 sin 377t V and i = 8 sin (377t-30°) A for an ac circuit. Determine (a) the power
factor, (b) true power, (c) apparent power, and (d) reactive power.

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