. 120° Explanation:-Three-phase half-wave rectifier. 1. Increases. Set 09. 3 phase induction motor. Syllabus of MCQ Test 02: ELECTRICAL MACHINES. Basic Electrical Engineering MCQ_78_1(Single phase AC) March 16, 2019 April 10, 2020 electricalworld Q.136 To draw phasor diagram of a.c circuit consists of R, L, C. which of the following is taken as reference value? (a) high, high (b) low, high (c) low, low (d) high, low. Your email address will not be published. ⇐ MCQ in AC Circuits Part 7 | REE Board Exam . Xc = 1/2πfC ….(2)….. In case of Inductive circuit, inductance (L) is ___________Proportional to the inductive reactance (XL). In inductive circuit, when inductive reactance XL increases, the circuit current decreases, and Vice Virsa. Primary Sidebar . ELECTRICAL MACHINES; POWER SYSTEMS; OTHER TOPICS; MCQs; RECENT POSTS; MCQ on Single Phase Induction Motor . 19. A capacitor, an electric resistance heater, and impedance are connected in parallel to a 120 V, 60 Hz system. In case of Inductive Circuit (*XL = Inductive Reactance), Impedance = Z =√ ( R2+XC2) … in Case if Capacitive Circuit (*Xc = Capacitive Reactance). For the circuit given below, the approximate value of reactance, impedance, current and power factor is———-respectively. (a) on full-load (b) on overload (c) on leading power factor (d) on zero power factor. Nov 19, 2017 - Single Phase AC Circuits MCQs ( With Explanatory Answers) Electrical and Electronics mcqs, multiple choice questions and fill in the blanks with explanation Theangle θ between Voltage and Current is Zero Explanation: We know that Power factor = Cos θ Given value of Power factor is = 1. Alternating current across a conductor is ———. Definition of Single phase. In a Capacitive circuit, when Capacitance (C) increases, ( the circuit current also increases), then the circuit power factor ________? kVA to Amps Conversion Formulas for Single, Two, and Three Phase AC Circuits [Video] September 13, 2020 November 18, 2020 admin 0 Comments ElectricalEngineering.XYZ Formula … Answer: (3)…Both 1 & 2. For the circuit given in previous question, the power consumed is—-. PARALLEL CIRCUITS. This test is Rated positive by 87% students preparing for Electrical Engineering (EE).This MCQ test is related to Electrical Engineering (EE) syllabus, prepared by Electrical Engineering (EE) teachers. Set 06. Depicted above, is a very simple AC circuit.If the load resistor’s power dissipation were substantial, we might call this a “power circuit” or “power system” instead of regarding it as just a regular circuit. Ques 44. Sine Waves of the same frequency can be represented using same phasor. In case of Inductive circuit, Frequency is ___________Proportional to the inductance (L) or inductive reactance (XL). There are two basic types of 3-phase rectifiers: the half-wave rectifier and the full-wave rectifier. – Examples in British and SI System, Thevenin’s Theorem. 18. 5. Q.196 Inductance L opposes changing in current during _____ A. stating interval B. transient interval C. normal D. any of the above Ans. (a) low insulation (b) easy access (c) lower terminal voltage and higher current rating (d) more number of turns, (a) not be open-circuited (b) not be short-circuited (c) either of the above (d) none of the above, (a) lubricate the core (b) insulate the core (c) insulate the coils (d) none of the above, (a) reduces dissipation of heat (b) may short-circuit the windings (c) absorbs oil and grease (d) tends to corrode the metal surface, (a) primary and secondary windings are capacitively coupled (b) primary and secondary windings are inductively coupled (c) primary and secondary windings are conductively coupled (d) none of the above, (a) where ratio of transformation is low (b) where it is required to isolate the two windings electrically (c) because it is much safer to use en auto-transformer (d) where large number of secondary taps are needed, (a) low (b) high (c) zero (d) none of the above, (a) low (b) high (c) either of the above (d) none of the above. S Bharadwaj Reddy November 3, 2016 November 3, 2017. Home >> Category >> Electrical Engineering (MCQ) questions and answers >> 3 - Phase AC Circuits; 1) In a balanced 3-phase system, if one of the two wattmeter’s reading is negative then the . Depicted above, is a very simple AC circuit.If the load resistor’s power dissipation were substantial, we might call this a “power circuit” or “power system” instead of regarding it as just a regular circuit. But, when Circuit inductance increased from 0.02H to 0.04 H, then current decreased from13.70 A to 18.64A. Name Email Website. Page-2 section-1 We use cookies to ensure that we give you the best experience on our website. which will improve your skill. Leave a Comment / Uncategorized / By Ajay Sharma. Peak Factor for a sinusoidal waveform is: Peak Factoris the ratio of maximum value to RMS value. In a split phase motor, the running winding should have (a) high resistance and low inductance (b) low resistance and high inductance (c) high resistance as well as high inductance (d) low resistance as well as low inductiance Ans: b 2. Single Phase A. C. Circuits. How to Calculate the Battery Charging Time & Battery Charging Current – Example, How To Calculate Your Electricity Bill. Inversely Explanation: So, in a capacitive circuit, frequency is inversely proportional to the Capacitance (C) and Capacitive reactance (Xc). Skip to content. There are two types of system available in electric circuit, single phase and three phase system.In single phase circuit, there will be only one phase, i.e the current will flow through only one wire and there will be one return path called neutral line to complete the circuit. In case of Inductive circuit, Frequency is _____Proportional to the inductance (L) or inductive reactance (X L). What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value? REE Board Exam September 2001. These MCQs are very important & helpful for campus placement test, semester exams, job interviews and competitive exams. When current across a series RLC circuit is in phase with the supply voltage, it is said to be in resonance. Set 10. In Capacitive circuit, when Capacitive reactance (Xc) increases, then the circuit power factor also increases. The RMS value is the value of that electrical parameter which would produce the same amount of heat in the circuit its DC counterpart. If you continue to use this site we will assume that you are happy with it. 0.6 leading unity 0.8 leading Answera A capacitor start, capacitor run single phase induction motor is basically a ac series motor 2 phase induction motor 3 phase induction motor. For the circuit given in question 6, assume the inductor is replaced by a capacitor of 75 microfarads. Jan 08,2021 - Test: Single Phase HW AC-DC - 2 | 20 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. in the world is in the form of three-phase AC circuits. The angle (θ) between Voltage and Current is Zero. 3. Set 02. Electrical Measurements. Three Phase Systems In Power Applications MCQ Test & Online Quiz: Below is the Three Phase Systems In Power Applications MCQ test that checks your basic knowledge of Three Phase Systems In Power Applications. Newer Post Older Post Home 1. Phasor Diagram is the representation of a sine wave using a single line rotating in counter-clockwise direction with a constant velocity. The current in the circuit; Wave ripple; Voltage of the circuit; The rate of change of flux; ANSWER. A capacitor, an electric resistance heater, and impedance are connected in parallel to a 120 V, 60 Hz system. Hence for the circuit, the power consumed is the power consumed by the resistance only. We are sure, this will help you to understand the complete concept of Active , … Hi Aspirants, In this Part we have included complete & detailed analysis of Power Triangle. 1. Single-phase motor MCQ - 1. 2. None of The Above; Show Explanatory Answer . (a) even harmonica in addition to fundamental (b) odd harmonics in addition to fundamental (c) both odd and even harmonics in addition to fundamental (d) none of the above. In case of Capacitive circuit, Capacitance (C) is ___________ Proportional to the Capacitive reactance (XC). it is represented by Y. In This poat, we are going to share Multiple Choice Questions (MCQ) on AC Fundamentals for Electrical Engineering Students. The essential condition is that this guide covers three phase ac circuits multiple choice questions with answers and explanation. 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