All Courses
Get the App Signup / Login
Sign in Open App
Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Test: Power Electronics- 7 - Electrical Engineering (EE) MCQ

Test: Power Electronics- 7 - Electrical Engineering (EE) MCQ


Test Description

10 Questions MCQ Test - Test: Power Electronics- 7

Test: Power Electronics- 7 for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Power Electronics- 7 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Power Electronics- 7 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Power Electronics- 7 below.
Solutions of Test: Power Electronics- 7 questions in English are available as part of our course for Electrical Engineering (EE) & Test: Power Electronics- 7 solutions in Hindi for Electrical Engineering (EE) course. Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free. Attempt Test: Power Electronics- 7 | 10 questions in 30 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study for Electrical Engineering (EE) Exam | Download free PDF with solutions
Test: Power Electronics- 7 - Question 1
Save

A three phase bridge inverter is fed from a 500 V dc source. The inverter is operated in 180° conduction mode and it is supplying a purely resistive, star – connected load. The RMS value of the output (line) voltage is

Detailed Solution for Test: Power Electronics- 7 - Question 1


= 0.816 × 500 = 408 V

Test: Power Electronics- 7 - Question 2
Save

In a three phase voltage source inverter operating in square wave mode, the output line voltage is free from

Detailed Solution for Test: Power Electronics- 7 - Question 2

The rms nth component of the line voltage is 
 

where Vdc is the input source voltage for n = 3, line voltage

Third harmonic component would not appear in the output

1 Crore+ students have signed up on EduRev. Have you? Download the App
*Answer can only contain numeric values
Test: Power Electronics- 7 - Question 3
Save

In single pulse modulation of PWM inverter, 3rd harmonic can be eliminated if pulse width is equal to______ (in degrees)


Detailed Solution for Test: Power Electronics- 7 - Question 3

Pulse width for eliminating

nth harmonic 

*Answer can only contain numeric values
Test: Power Electronics- 7 - Question 4
Save

A three – phase bridge inverter delivers power to a resistive load from a 450 V dc source. for a star connected load if 10Ω per phase. What is the load power for 180° conduction mode ______________ (in kW)

Detailed Solution for Test: Power Electronics- 7 - Question 4

Test: Power Electronics- 7 - Question 5
Save

A 3 ϕ bridge inverter delivers power to a resistive load from a 400 V dc. For a star – connected load of 15 Ω per phase, determine load power and R.M.S value of thyristor current for 120° mode
Detailed Solution for Test: Power Electronics- 7 - Question 5


load power = 3I2or R = 3 × (10.87)2 × 15 = 5.317kW

*Answer can only contain numeric values
Test: Power Electronics- 7 - Question 6
Save

A 3 phase MOSFET inverter is connected between a balanced star connected resistive load with RL = 10 Ω and a 250 V dc supply. The inverter frequency is set at 33 Hz, and the switches have 120° conduction periods. Calculate the load power _______ (in kW)

Detailed Solution for Test: Power Electronics- 7 - Question 6


= 3.13 kW

*Answer can only contain numeric values
Test: Power Electronics- 7 - Question 7
Save

for a single pulse – width modulation of a single phase inverter, The distortion factor for pulse width of π/2 is ___________

Detailed Solution for Test: Power Electronics- 7 - Question 7

given, 2d = π/2

single pulse modulation output for pulse width 2d = π/2 is shown below.

from Fourier series, fundamental output voltage is

from output voltage wave form

Test: Power Electronics- 7 - Question 8
Save

For a load of R = 10 Ω and L = 0.03 H, Find the RMS value of the fundamental component of inverter output current in case inverter of part Quasi-square output with 120° pulse width. The source voltage is 230 V and frequency 50 Hz
Detailed Solution for Test: Power Electronics- 7 - Question 8

Concept:

The output voltage is controlled by varying the pulse-width 2d. This shape of the output voltage is called Quasi-square wave.

Fourier series of this wave from is

Fundamental component of output voltage

Calculation:
Load impedance at Fundamental Frequency is

For Quasi-square wave or single-pulse modulated wave where pulse width, 2d = 120° or d = 60°

∴ R.M.S value of fundamental current

*Answer can only contain numeric values
Test: Power Electronics- 7 - Question 9
Save

The inverter is operated at 50 Hz. In 180° square wave mode. Find the peak to peak inductor i0 in the circuit shown in figure.

Detailed Solution for Test: Power Electronics- 7 - Question 9


at, t = 0, i0 = -ip and t = t1, i0 = ip

*Answer can only contain numeric values
Test: Power Electronics- 7 - Question 10
Save

For the symmetrical two pulse modulation with pulse width 36°. Find the percentage of 3rd harmonic in the output voltage  is_______

Detailed Solution for Test: Power Electronics- 7 - Question 10

Concept:

In multiphase pulse modulation, several equidistant pulses per half cycle are used.

Fourier series of multiple pulse modulation is

N = pulse per half cycle

Calculation:

Information about Test: Power Electronics- 7 Page
In this test you can find the Exam questions for Test: Power Electronics- 7 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Power Electronics- 7, EduRev gives you an ample number of Online tests for practice

Top Courses for Electrical Engineering (EE)

Download as PDF

Top Courses for Electrical Engineering (EE)

Important Questions for Power Electronics- 7

Find all the important questions for Power Electronics- 7 at EduRev.Get fully prepared for Power Electronics- 7 with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Power Electronics- 7 syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Power Electronics- 7 resources.

Power Electronics- 7 MCQs with Answers

Prepare for the Power Electronics- 7 within the Electrical Engineering (EE) exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Power Electronics- 7

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Power Electronics- 7 with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup