All Courses
Get the App Signup / Login
Sign in Open App
Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Test: Single Phase HW AC-DC - 2 - Electrical Engineering (EE) MCQ

Test: Single Phase HW AC-DC - 2 - Electrical Engineering (EE) MCQ


Test Description

20 Questions MCQ Test - Test: Single Phase HW AC-DC - 2

Test: Single Phase HW AC-DC - 2 for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Single Phase HW AC-DC - 2 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Single Phase HW AC-DC - 2 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Single Phase HW AC-DC - 2 below.
Solutions of Test: Single Phase HW AC-DC - 2 questions in English are available as part of our course for Electrical Engineering (EE) & Test: Single Phase HW AC-DC - 2 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: Single Phase HW AC-DC - 2 | 20 questions in 20 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: Single Phase HW AC-DC - 2 - Question 1
Save

 Choose the correct statement with respect to the below given circuit.

Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 1

 The voltage cannot be negative due to the FD (freewheeling diode or commutating diode so connected).

Test: Single Phase HW AC-DC - 2 - Question 2
Save

In the below given circuit, the FD (Freewheeling diode) is forward biased at ωt =

Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 2

It is forward biased at π by the conducting SCR & the current starts to through the FD & Load.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Single Phase HW AC-DC - 2 - Question 3
Save

In the below given circuit, when the commutating diode or FD is conducting than the

Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 3

When the FD is forward biased at π by the conducting SCR & the current starts to through the FD & load.

Test: Single Phase HW AC-DC - 2 - Question 4
Save

The output voltage waveform of the below given circuit would be the same that obtained from a
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 4

The wave from will be like a half wave diode rectifier circuit. Which is the same as that obtained from a half-wave R load circuit and the above given circuit.

Test: Single Phase HW AC-DC - 2 - Question 5
Save

 In a single-phase half-wave circuit with RL load and a freewheeling diode, the load voltage during the freewheeling period will be
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 5

 The FD short circuits the load and voltage across a short circuit would be = 0.

Test: Single Phase HW AC-DC - 2 - Question 6
Save

 In a single-phase half-wave circuit with RL load and a freewheeling diode, the freewheeling period is
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 6

Freewheeling period is the one in which the FD diode conducts.

Test: Single Phase HW AC-DC - 2 - Question 7
Save

A single-phase half wave rectifier with a FD is supplied by Vs = 240 V, AC with a load R = 10 Ω, L = 0.5 mH and a firing angle α = 30°. Find the average value of the load voltage.
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 7

Vo = (Vm/2π) x (1+cosα)
Vm = √2Vs.

Test: Single Phase HW AC-DC - 2 - Question 8
Save

A single-phase HW rectifier with a FD is supplied by Vs = 240 V, 50 Hz, AC with a load R = 10 Ω, L = 0.5 mH and a firing angle α = 30°. Find the average value of the load current.
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 8

Vo = (Vm/2π) x (1+cosα)
Vm = √2Vs
Io = Vm/R (Due to the FD).

Test: Single Phase HW AC-DC - 2 - Question 9
Save

A single phase half-wave controlled rectifier has 400 sin314t as the input voltage and R as the load. For a firing angle of 60°,the average output voltage is
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 9

Vo = (Vm/2π) x (1+cosα) = 400/2π x (1+cos60) = 300/π.

Test: Single Phase HW AC-DC - 2 - Question 10
Save

Choose the incorrect statement with respect to the use of FD in half-wave circuits.
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 10

 PIV is unaffected with the use of FD (freewheeling diodes).

Test: Single Phase HW AC-DC - 2 - Question 11
Save

A single-phase half-wave rectifier with a FD is supplied by Vs = 240 V, 50 Hz, AC source with a load R = 10 Ω, L = 0.8 mH. The firing angle is so adjusted such that the output voltage obtained is 100 V. Find the firing angle.
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 11

Vo = Vm/2π cos(firing angle).

Test: Single Phase HW AC-DC - 2 - Question 12
Save

For the below shown circuit, a motor load (RLE) is connected to the SCR through supply Vs. The minimum value of the firing angle to turn on the SCR would be
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 12

The firing angle should be such that the value of V exceeds E. So SCR turns on at excatlly Vm sinωt = E
Therefore ωt = min. angle = Sin-1(E/Vm).

Test: Single Phase HW AC-DC - 2 - Question 13
Save

Choose the correct statement with respect to the below given circuit.
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 13

Even if no current is flowing through the load when the SCR is off, voltage = E will exists at the load terminals at all times.

Test: Single Phase HW AC-DC - 2 - Question 14
Save

By using a freewheeling diode (FD) in a rectifier with RL load, the power consumed by the load
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 14

The FD feeds inductor current again to the load.

Test: Single Phase HW AC-DC - 2 - Question 15
Save

A 230 V, 50 Hz, one-pulse SCR controlled converter has extinction angle β = 210°. Find the circuit turn-off time
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 15

t = 2π-β/ω
Where, π = 90°
ω = 2xπx50
β = 210°.

Test: Single Phase HW AC-DC - 2 - Question 16
Save

A 230V, 50Hz, single-pulse SCR is feeding a RL load with α = 40° and β = 210°. Find the value of average output voltage
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 16

Vo = Vm/2π x (cosα-cosβ)
Where Vm = √2Vs.

Test: Single Phase HW AC-DC - 2 - Question 17
Save

A single-pulse transformer with secondary voltage of 230 V, 50 Hz, delivers power to bulb of R = 10 Ω through a half-wave controlled rectifier circuit. For α = 60°, find the average current in the bulb
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 17

 First find the average voltage, than Io = Vo/R
Vo = (Vm/2π) x (1+cosα).

Test: Single Phase HW AC-DC - 2 - Question 18
Save

A single-pulse transformer with secondary voltage of 230 V, 50 Hz, delivers power to bulb of R = 10 Ω through a half-wave controlled rectifier circuit. For α = 60° and output AC power of 2127 Watts, find the rectification efficiency
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 18

Vo = (Vm/2π) x (1+cosα) = 77.64 V
Pdc = Vo2xR = 602.8 W
Rectification efficiency = Pdc/Pac = 28.32 %.

Test: Single Phase HW AC-DC - 2 - Question 19
Save

Find the PIV of the SCR
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 19

 The maximum negative voltage faced by the SCR is –Vm which is nothing but √2Vs.

Test: Single Phase HW AC-DC - 2 - Question 20
Save

An SCR rectifier circuit is designed such that the average output voltage is 77.64 V & RMS value of output voltage is 145.873 V. Find the voltage ripple factor.
Detailed Solution for Test: Single Phase HW AC-DC - 2 - Question 20

FF = 145.873/77.64 = 1.879
VRF = √(FF2-1) = 1.5908.

Information about Test: Single Phase HW AC-DC - 2 Page
In this test you can find the Exam questions for Test: Single Phase HW AC-DC - 2 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Single Phase HW AC-DC - 2, 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 Single Phase HW AC-DC - 2

Find all the important questions for Single Phase HW AC-DC - 2 at EduRev.Get fully prepared for Single Phase HW AC-DC - 2 with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Single Phase HW AC-DC - 2 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 Single Phase HW AC-DC - 2 resources.

Single Phase HW AC-DC - 2 MCQs with Answers

Prepare for the Single Phase HW AC-DC - 2 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 Single Phase HW AC-DC - 2

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 Single Phase HW AC-DC - 2 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