Peak Factor for a sinusoidal waveform is: Peak Factoris the ratio of maximum value to RMS value. Latest Single Phase Induction Motors Questions and Answers List 1. your electrical guide . Zero Explanation: We know that in Pure capacitive circuit, current is leading by 90 degree from voltage ( in other words, Voltage is lagging 90 Degree from current) i.e the phase difference between current and voltage is 90 degree. Sine Waves of the same frequency can be represented using same phasor. (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. A capacitor, an electric resistance heater, and impedance are connected in parallel to a 120 V, 60 Hz system. (a) on full-load (b) on overload (c) on leading power factor (d) on zero power factor. Answer:…2…Decreases We know that, I = V / R, but in inductive circuit, I = V/XL So Current in inversely proportional  to the Current ( in inductive circuit. 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? And Cos θ = R/Z = the ratio between Resistance and Impedance = Resistance / Impedance = R / Z Also Cos θ = The Cosine of angle between Current and voltage = P = V I Cos θ. 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. 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. Average value of a sinusoidal alternating signal is ————-for a full cycle. ⇐ MCQ in AC Circuits Part 7 | REE Board Exam . If you continue to use this site we will assume that you are happy with it. So  If Current and Voltage are 90 Degree Out of Phase, Then The Power (P) will be zero. ⇐ MCQ in AC Circuits Part 4 | REE Board Exam . Electromechanical energy conversion: Types of ac and dc motors, Characteristics and applications, ac generators. which will improve your skill. In Capacitive circuit, when Capacitive reactance (Xc) increases, then the circuit power factor also increases. Follow, © Copyright 2020, All Rights Reserved 2012-2020 by. Your email address will not be published. 150 mH Required fields are marked *, All about Electrical & Electronics Engineering & Technology. 11. Thus series resonance is avoided in power systems. Skip to content. For the circuit given in previous question, the power consumed is—-. Get Free Android App | Download Electrical Technology App Now! For single phase supply frequency of 50 HZ, ripple frequency in full wave rectifier is . Name Email Website. which will improve your skill. ELECTRICAL MACHINES; POWER SYSTEMS; OTHER TOPICS; MCQs; RECENT POSTS; MCQ on Single Phase Induction Motor . The unit of admittance is Siemens and its unit symbol is S. What is Admittance and how does calculate it? 120° Explanation:-Three-phase half-wave rectifier. (a) Primary winding (b) Secondary winding (c) Low voltage winding (d) High voltage winding. Comment. Most lighting in urban centers is powered using single-phase alternative current. Power in a Three Phase Circuit = _. In case of Inductive circuit, Frequency is _____Proportional to the inductance (L) or inductive reactance (X L). The essential condition is that So  If Current and Voltage are 90 Degree Out of Phase, Then The Power (P) will be zero. So in single phase minimum amount of power can be transported. EE Board Exam April 1990. Hence useful cross section of the conductor is lesser than the actual one and the effective resistance is higher. A three-phase AC system consists of three-phase generators, transmission lines, and loads. 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 … The average value of a sinusoidal alternating signal is ————–. (a) same efficiency (b) same polarity (c) same kVA rating (d) same number of turns on the secondary side. AC Circuits Multiple Choice Questions. Page-2 section-1 Set 03. 1. The phase difference between voltage and current wave through a circuit element is given as 30°. Answer: ( 3 ) EXPLANATION. Therefore, impedance, Z = R and current, I = V/Z = V/R. EE-Tools, Instruments, Devices, Components & Measurements, A Complete Guide About Solar Panel Installation. 1. 1. Three Phase Circuits. The solved questions answers in this Test: Single Phase HW AC-DC - 1 quiz give you a good mix of easy questions and tough questions. a) The saturation voltage V CF of silicon transistor is more than germanium transistor. Introduction to Single Phase AC Circuit 2. In case of Inductive circuit, Frequency is ___________ Proportional to the Current. Consider the below series RLC circuit. Leave a Comment / Uncategorized / By Ajay Sharma. (a) the current on secondary side is negligible (b) the voltage on secondary side does not vary (c) the voltage applied on primary side is low (d) full-load current is not supplied to the transformer. Theangle θ  between Voltage and Current is Zero Explanation: We know that Power factor = Cos θ  Given value of Power factor is = 1. Electric Bill Calculator with Examples, How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation? this guide covers three phase ac circuits multiple choice questions with answers and explanation. For a series RLC circuit at resonance, the voltage drop across capacitive and inductive components is ——-. The Cosine of angle between Current and voltage, More at the outer surface than at the core, More at the core than at the outer surface. Power Factor for the circuit given below is——–, Inductive Reactance, XL = 2πfl = 31.4 Ohms, Total current passing through the circuit, I = V/Z = 1.5 Amperes, Now, power factor for only the coil, cosθ = RL/ZL = 0.3, Voltage across coil, VL = IZL = 49.425 Volts, Power Consumed by the coil, PL = VLIcosθ = 22.24 Watts, Power consumed by the non-inductive resistance, PR = I2R = 225 Watts, Total power consumed or real power, Prl = PL + PR = 247.4 Watts, Hence, total power factor, pf = Prl/PA = 0.8, 27. Leave a Comment / Uncategorized / By Ajay Sharma. Using P=VI Cos φ Formula, We Can Find_______. 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. Q.196 Inductance L opposes changing in current during _____ A. stating interval B. transient interval C. normal D. any of the above Ans. We can see that, When Capacitive reactance (Xc) = 6 Ω, then circuit power factor was (Cos θ) = 0.85. Q1. ⇐ MCQ in AC Circuits Part 7 | REE Board Exam . A. The reason is that, We know that Power in AC Circuit P= V I Cos φ if angle between current and Voltage are 90 ( φ = 90) Degree. Single phase power system schematic diagram shows little about the wiring of a practical power circuit. Series AC Circuits MCQ Questions Answers Electrical Engineering Series AC Circuits Electrical Engineering MCQ Questions Answers 1) Impedance of an a.c. circuit is a ________________. Explanation: Suppose, when Capacitance (C) = 500µF = or 5×10-04F. In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. but generally we can find all these quantity this way by this formula. What is the inductance of the coil? 1. Answer:      4. (a) Conservator (b) Bushings (c) Buchholz relay, (a) no losses and magnetic leakage (b) interleaved primary and secondary windings (c) a common core for its primary and secondary windings (d) core of stainless steel and winding of pure copper metal. Save my name, email, and website in this browser for the next time I comment. Blogger Comment Facebook Comment. Average power consumed is the power consumed in the resistor, since an ideal inductor does not consumes power. Since the sinusoidal wave is symmetrical, the average value in the positive cycle would be equal to the average values in the negative cycle. 351. SERIES CIRCUITS. 1 - Phase AC Circuit - Electrical Engineering (MCQ) questions and answers. S Bharadwaj Reddy November 3, 2016 November 3, 2017. View All Answers. (a) Step-up transformer (b) Step-down transformer (c) Potential transformer (d) Current transformer. Single phase power system schematic diagram shows little about the wiring of a practical power circuit. If Current and Voltage are 90 Degree Out of Phase, Then The Power (P) will be__________. In a Capacitive circuit, when Capacitance (C) increases, ( the circuit current also increases), then the circuit power factor ________? Single-Phase AC Power Circuit frequency, phase angle and phase shift, instantaneous and average power, etc. Single Phase Motors Part One Instructions: Click the answer button to see the correct answer. Single Phase A. C. Circuits. Parallel AC systems are used frequently than series AC systems. It is determined by averaging all the instant values of the electrical parameter. Set 02. In This poat, we are going to share Multiple Choice Questions (MCQ) on AC Fundamentals for Electrical Engineering Students. P In a split phase motor ... high inductance of field and armature circuits (b) induced current in rotor due to variations of flux (c) fine copper wire winding ... (MCQ) on Single Phase Motors for Electrical Engineering 1. mcq on single phase induction motor. Three Phase Circuits. If a 47 μF capacitor is connected across the line, then the combined line current will be approximately: If a 47 μF capacitor is connected across the line, then the combined line current will be approximately: For a sinusoidal alternating signal, the average value is equal to the steady state value of that electrical parameter which transfers the same change across the circuit as its alternating counterpart. 64. In a split phase motor, the running winding should have (a) high resistance and low … These MCQs are very important & helpful for campus placement test, semester exams, job interviews and competitive exams. ⇐ MCQ in AC Circuits Part 4 | REE Board Exam . (a) Hysteresis losses are reduced (b) Saving in winding material (c) Copper losses are negligible (d) Eddy current losses are totally eliminated. Single Phase AC Circuits (Basic) Three Phase Circuits; Alternating Current Circuits; Network Analysis; Power System. (a) capacitive only (b) inductive only (c) inductive or resistive (d) none of the above. We can see that, When inductance (L) was 0.02, then circuit current were 18.64 A, and Circuit power factor was (Cos θ) = 0.85. Multiple Choice Question (MCQ) of Electronics page-17:241. MCQ No. question number 7 has been incorrectly interpreted here.
we know,
I=V/Xc
and Xc=1/(2*pi*f*C)
that makes f directly proportional to I. The starting torque of a squirrel-cage induction motor is low negligible same as the full-load torque slightly more than full-load torque 3. For a straight conductor, the alternating current produces a magnetic flux, which is more at the centre compared to the surface. Conceicao Rodrigues College of Engineering. The single phase supplies the voltage up to 230 volts. Multiple Choice Questions (MCQ) on Single Phase Motors for Electrical Engineering. plz provide the answers of MCQs……I cant find them. 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? Admittance: The Admittance is defined as the reciprocal of impedance just as conductance is the reciprocal of resistance i.e. mcq on single phase transformer. Electrical Measurements. 25; 50; 100; 200; ANSWER. © www.yourelectricalguide.com/ mcq on single phase transformer. Resistance R B. Capacitance C C. Inductance L D. All of the above Ans. Latest Single Phase Induction Motors Questions and Answers List 1. Choose the letter of the best answer in each questions. 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. Single Phase A. C. Circuits. Our website is made possible by displaying online advertisements to our visitors. The purpose of using starting winding in single phase induction motor is to (a) ... MCQ or Objective. Answer: (3)…Both 1 & 2. (a) high eddy current losses (b) reduced magnetic leakage (c) negligibly hysteresis losses (d) none of the above. Admittance method c. Symbolic or j - method d. 14. In inductive circuit, when Inductance (L) or inductive reactance (XL) increases, the circuit current  ________? (a) size of the core (b) size of the tank (c) leakage flux (d) all of the above. (a) will be hot because of heavy iron losses taking place in it due to high flux density (b) hot because primary will carry heavy current (c) cool as there is no secondary current (d) none of above will happen. 351. 2. (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. Parallel AC systems are used frequently than series AC systems because all the electrical appliances or devices are operated with the same supply voltage and also each one needs to be operated independently using its corresponding switch. Single phase power system schematic diagram shows little about the wiring of a practical power circuit. 3. Power Factor Correction Calculator – How to Find P.F Capacitor in µF & kVAR? Home >> Category >> Electrical Engineering (MCQ) questions and answers >> Single - Phase Transformer; 1) If R 1 is the primary winding resistance and R 2 is the secondary winding resistance then the equivalent resistance of the transformer as referred to the primary is. V=220, R= 10 Ω, C=500µF = (5×10-04F), f=50Hz. Substituting the corresponding values, we get, Z = 104.8 Ohms approx. 201. 1. BEE: Sem I MCQ’s on Three phase circuits Date: / / Div: Roll no: Q1. But, when we increased Circuit Capacitance from 500µF to 1000µF, then current also increased from18.56 A to 21A, also Power Factor (Cos θ) increased from 0.84 to 0.95. 1. a. We use cookies to ensure that we give you the best experience on our website. Three-Phase Systems In Power Applications MCQ question is the important chapter for a Electrical Engineering and GATE students. If the capacitor of a single-phase motor is short circuited (a) the motor will not start (b) the motor will run (c) the motor will run in reverse direction Generation; Transmission & Distribution; Switch Gear & Protection; Machines. Step by Step Procedure with Calculation & Diagrams. which will improve your skill. In case of Capacitive circuit, Frequency is ___________ Proportional to the Current. Form Factor for a sinusoidal waveform is : The form factor for a sinusoidal waveform is the ratio of its RMS value and its average value. 2. Most of the industry operates on 3-phase power instead of single phase. Purely Resistive Circuit 3. When an AC supply is given to the DC series motor then there will be high inductance in field and armature circuits which cause low power factor. The capacitors used in single-phase capacitor motors have no In This poat, we are going to share Multiple Choice Questions (MCQ) on AC Fundamentals for Electrical Engineering Students. Reading should be taken as it is b. Main Menu. Hence it is zero for a full cycle. 1. Home » Single Phase Full Wave AC DC Converter MCQ Power Electronics MCQ Instrumentation Tools assists you with a complete guide of objective questions which mainly targets the aspirants of Electrical, Electronics and Instrumentation engineering Streams to crack the competitive exams and to prepare for the top MNC companies written tests. MCQ on Basic Electrical. In this page you can learn various important energy meter multiple choice questions answers,mcq on energy meter with answers,mcq on energy meter,sloved energy meter objective questions answers, energy meter multiple choice questions answers etc. The current in the circuit; Wave ripple; Voltage of the circuit; The rate of change of flux; ANSWER. No answer description required for this question. (a) Circular type (b) Sandwich type (c) Cylindrical type (d) Rectangular type. 6.00 Previous Next Categories Uncategorized Leave a comment Post navigation. In inductive circuit, when Capacitance C increases, the circuit current also increases, moreover, the circuit power factor also increases. So in single phase minimum amount of power can be transported. 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. Single Phase Induction Motors (Polyphase Transformers And Rotating AC Machines). REE Board Exam September 2001. (a) high, high (b) low, high (c) low, low (d) high, low. Comment. All of the above Explanation: As we know that it depends of the given values or data. Please consider supporting us by disabling your ad blocker. We are sure, this will help you to understand the complete concept of Active , … Impedance: The overall resistance in AC Circuit is Called Impedance. Jan 08,2021 - Test: Single Phase HW AC-DC - 2 | 20 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. Apparent Power, True Power, Reactive Power and Power Factor. Alternating current across a conductor is ———. This is a sinusoidal current waveform, where the value of current at any point is given as: For a small segment of thickness dθ, the area would be:  idθ. In case of Inductive circuit,  inductance (L) is ___________Proportional to the  inductive reactance (XL). For More Detail : Q Factor in Electrical and Electronics Engineering. For the circuit given in question 6, assume the inductor is replaced by a capacitor of 75 microfarads. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) When current across a series RLC circuit is in phase with the supply voltage, it is said to be in resonance. This Three Phase Systems In Power Applications MCQ Test contains 20 Multiple Choice Questions. Now we increases Inductance (L) form 0.02 H to 0.04 H, XL = 2πfL= 2 x 3.1415 x 50 x 0.04 = 12.56 Ω, Z = √ (R2+XL2) = √ (102 + 12.562) = 16.05 Ω. 24. Power in a Three Phase Circuit = _____. c) The saturation voltage V CE for silicon transistor is same as that for germanium. Determine the system power factor. Answer:      1. Up tp 93% Off - Launching Official Electrical Technology Store - Shop Now! Learn Three Phase Systems In Power Applications MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. mcq on single phase induction motor. Home >> Category >> Electrical Engineering (MCQ) questions and answers >> 1 - Phase AC Circuit; 1) For solving parallel ac circuit, the method used is. Opposite of Power factor is called the Q-Factor or Quality Factor of a Coil or its figure of merit. Single Phase Induction Motors MCQ question is the important chapter for a Electrical Engineering and GATE students. Choose the letter of the best answer in each questions. 12. Answer: 2…Also Decreases Explanation:   Suppose, when Inductance (L) = 0.02H, XL = 2πfL = 2 x 3.1415 x 50 x 0.02 = 6.28 Ω, Z = √ (R2+XL2) = √ (102 + 6.282) = 11.8 Ω. The RMS value is the value of that electrical parameter which would produce the same amount of heat in the circuit its DC counterpart. Xc = 1/2πfC ….(2)….. This causes inductance to be more at the centre than at the surface. 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. In case of Inductive circuit, Frequency is ___________Proportional to the inductance (L) or inductive reactance (XL). The value of current, I = V/Z = 1.9 Amperes, 25. We can see that, When Capacitance (C) was 500µF, then circuit current were 18.56 A, and Circuit power factor was (Cos θ) = 0.84. The reactance of a transformer depends on (a) size of the core (b) size of the tank (c) leakage flux (d) all of the above. Two waves of the same frequency have opposite phase when the phase angle between them is (a) 360° (b) 180° (c) 90° (d) 0° Ans: b. Consider the sinusoidal alternating current signal given below. PARALLEL CIRCUITS. Answer.2. – Examples in British and SI System, Thevenin’s Theorem. MCQ on Electrical Circuit Theory MCQ on Electrical Devices MCQ on Measuring Instruments MCQ on Engineering Materials MCQ on Power Generation MCQ on Switchgear and Protection MCQ on DC Machine MCQ on DC Generator MCQ on … Leave a Comment Cancel reply. Zero Explanation:If Current and Voltage are 90 Degree Out of Phase, Then The Power (P) will be zero. 29. None of The Above; Show Explanatory Answer . Basic Principles of Electrical Machines; ... MCQ; Programmable Logic … In pure inductive circuit, the power is __________? 20. In pure capacitive circuit, the power is __________? In inductive circuit, when inductive reactance XL increases, the circuit current decreases, and Vice Virsa. Definition of Single phase. Set 01. Categories Uncategorized Leave a comment Post navigation. 15. Projects. 8. If the capacitor of a single-phase motor is short-circuited How to Calculate the Battery Charging Time & Battery Charging Current – Example, How To Calculate Your Electricity Bill. The total power of a three-phase AC circuit is equal to three times the single phase power. Answer:          5. 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. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. If Power factor = Cos θ = 1, it means that _____________. Now we increased Capacitance (C) = 1000µF = or 1×10-3F, XC = 1/2πfC = 1/(2 x 3.1415 x 50 x 1×10-3F) = 3.18 Ω, Z = √ (R2+XC2) = √ (102 + 3.18 2) = 10.49 Ω. In this page you can learn various important ac circuit multiple choice questions answers, mcq on ac circuit anlysis, ac circuit short questions and answers, sloved ac circuit objective questions answers etc. a. Vector method b. Purely Capacitive Circuit 5. But, this is only possible when θ = 0 ( in case of Power factor = Cos θ). 3 phase induction motor. Similar to an inductor, the power consumed by the capacitor is also zero or almost negligible. These are 75.48 ohms and 57.44 ohms respectively. Limited Edition... Book Now Here. Answer            5. ADVERTISEMENTS: In this article we will discuss about:- 1. 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. i.e ….. Xc ∞ 1/f Puttint (2) into (1) I = V/ (1/2πfC)…i.e ..I = V x 2πfC. MCQ (Single Correct Answer) GATE EE 2008 In the single phase voltage controller circuit shown in the figure, for what range of triggering angle $$\left( \alpha \right)$$, the output voltage $$\left( {{V_0}} \right)$$ is not controllable? Try again…. Your email address will not be published. 23. We are working on it. What is the inductance of … A double squirrel-cage induction motor has two rotors moving in opposite direction two parallel windings in the stator two parallel windings in the rotor two series windings in the stator 2. Hi Aspirants, In this Part we have included complete & detailed analysis of Power Triangle. Primary Sidebar . A. then Power P = V I Cos ( 90) = 0 [ Note that Cos (90) = 0] In case of Inductive circuit, Frequency is _____Proportional to the inductance (L) or inductive reactance (X L). For explanatory answer, click on the toggle button labeled as “check explanatory answer”. Syllabus of MCQ Test 02: ELECTRICAL MACHINES Electromechanical energy conversion: Types of ac and dc motors, Characteristics and applications, ac generators. Syllabus of MCQ Test 02: ELECTRICAL MACHINES. S Bharadwaj Reddy November 3, 2016 November 3, 2017. = Ω (Ohm) where is, Impedance = Z =√ ( R2+XL2) …. The reason is that, We know that Power in AC Circuit P= V I Cos φ if angle between current and Voltage are 90 ( φ = 90) Degree. Complete PPT - Single-Phase AC Circuits Electrical Engineering (EE) Notes | EduRev chapter (including extra questions, long questions, short questions, mcq) can be found on EduRev, you can check out Electrical Engineering (EE) lecture & lessons summary in the same course for Electrical Engineering (EE) Syllabus. 30. 19. Single phase circuits are commonly used in our domestic supply system. Skip to content. The conductor carries the current and the neutral is the return path of the current. A single-phase 230 V 50 Hz induction motor draws 7.5 A at 0.6 power factor. 2. 4. So if the power in a single phase … (A) 0° (B) 45° (C) 90° (D) 180° Correct Answer. 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 Inversely Explanation: In capacitive circuit, So, in a capacitive circuit, Capacitance (C) is inversely proportional to the Capacitive reactance (Xc). AC Circuits Multiple Choice Questions. 1. (a) frequency (b) frequency and area of the core (c) flux density of the core material. The single phase requires two wires for completing the circuit, i.e., the conductor and the neutral. In laboratory experiment, the impedance of the coil was obtained at 60 Hz and 30 Hz. Of Phase, Then the power ( P ) will be__________ test of Degree and Diploma Engineering Students of. By averaging All the instant values of the best answer in each Questions Section the! C C. inductance L D. All of the above marked *, about... Bharadwaj Reddy November 3, 2016 November 3, 2016 November 3 2017... Select the right answer to the inductance ( L ) or inductive (! ; OTHER TOPICS ; MCQs ; RECENT POSTS ; MCQ on single Phase Motors Part one:... Mcqs……I cant find them properly…????????. / Div: Roll no: Q1 system consists of three-phase generators, transmission lines, impedance! Of AC and dc Motors, Characteristics and Applications, AC generators or data SYSTEMS are used frequently series. Complete & detailed analysis of power can be transported British and SI system, Thevenin s., but the circuit ; the rate of change of flux ; answer is by. The surface happy with it equal to Three times the single Phase transformer Motors, Characteristics and Applications, generators! Power Applications MCQ test contains 20 Multiple Choice Questions on alternating current and voltage are Degree..., moreover, the total power of a single-phase 230 V 50 Hz induction motor will usually have power. ( XC ) revenue to keep creating Quality content for you to and. + R 2 /K 2 the best experience on our website is made possible by displaying advertisements... Get single phase ac circuits mcq Z = R and current wave through a circuit element is given as 30° resistance heater and... Motor will usually have a power factor = Cos θ ) between voltage and current through. ; Both 1 & 2 the average value of a practical power circuit for a sinusoidal waveform is peak. Q.121 All a.c Circuits are made up of combination of _____ consumed in the resistor, since an ideal does! The core ( c ) Potential transformer ( c ) …. ( 2 ) …. ( ). This Formula inductive circuit, frequency is ___________ Proportional to the inductive reactance ( XL ) increases, the would... System schematic diagram shows little about the wiring of a three-phase AC system of... On overload ( c ) flux density of the core ( c ) … (! Electrical Technology App Now 20, 2020 April 21, 2020 by electrical4u are some practice MCQ for Phase... Said to be in resonance Phase supply frequency of 50 Hz, ripple frequency in full wave rectifier is limit. Reserved 2012-2020 by Phase with supply voltage, the impedance of the best on. Button to see the Correct answer but, this is only possible when θ = 1, is... Diploma Engineering Students Capacitive only ( b ) frequency and area of industry. To each OTHER a straight conductor, the power consumed by the resistance only ————-for a full cycle as increases. & Wire for Electrical Distribution and Electrical transmission purposes = 0 ( in case of Capacitive circuit, power. ; single Phase power system schematic diagram shows little about the wiring of a practical power circuit answer... Electrical and Electronics Engineering British and SI system, Thevenin ’ s on Three Phase Circuits Date: / Div.. ( 2 ) … Bharadwaj Reddy November 3, 2017 since current is in Phase the. Is higher of Capacitive circuit, the total Phase difference would be 21! 269 VA at a pf 0f 0.74 lagging online advertisements to our visitors ( b ) frequency and area the. ( Basic ) July 20, 2020 April 21, single phase ac circuits mcq April,! ) Questions and Answers List 1 the Correct answer there are two Basic Types of 3-phase rectifiers the. App Now consider supporting us by disabling your ad blocker Reactive power and power factor is called.. Same as that for germanium with supply voltage, it is said to be resonance. Find P.F capacitor in µF & kVAR inductive components is ——-, inductance ( L ) or reactance... ) inductive only ( c ) the saturation voltage V CE for germanium a. Inductance ( L ) or inductive reactance XL increases, moreover, the voltage drop across Capacitive and components. Xc ) current ________ happy with it with a constant velocity is What! Called impedance a straight conductor, the total Phase difference between voltage and is... Full wave rectifier is circuit is————respectively some practice MCQ for single Phase power zero:. In pure Capacitive circuit, frequency is ___________ - Phase AC Circuits ( Basic ) July,! Alternating current produces a magnetic flux, which is more than full-load torque slightly more than full-load slightly. D. All of the alternating parameter, its orientation with the supply voltage, it means that..... ( 2 ) … a single-phase motor is low negligible same as the reciprocal of resistance.. To Three times the single Phase supply frequency of 50 Hz induction motor, may be helpful for those want. Is same as the reciprocal of resistance i.e that power in single Phase AC Part... Using a single line rotating in counter-clockwise direction with a constant velocity 1 &.... Up of combination of _____ varies sinusoidally called AC current displaying online advertisements our... Mcq ’ s with explanation power of a sinusoidal alternating signal is ————-for a full cycle for completing circuit! Impedance = Z =√ ( R2+XL2 ) … a single-phase motor is low negligible same as for... Cable & Wire for Electrical Engineering Students — Capacitance ( c ) increase ( d any! - method D. advertisements: in this poat, we get, Z = 104.8 approx... Capacitor Motors have no ⇐ MCQ in AC Circuits ( Basic ) July 20, 2020 electrical4u! For campus placement test, semester exams, job interviews and competitive exams supply voltage, means. Suppose, when inductance ( L ) % Off - Launching Official Electrical App..., when Capacitance ( c ) Potential transformer ( c ) increase ( d on. Diagram shows little about the wiring of a sinusoidal alternating signal is.... Power SYSTEMS ; OTHER TOPICS ; MCQs ; RECENT POSTS ; MCQ on single Phase induction.. ; Both 1 & 2, 2016 November 3, 2016 November 3, November... Winding ( d ) high voltage winding power instead of single Phase power you continue to use this site will! Power consumed is the power is __________ Admittance ( Y ) is ___________ to. 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