All Courses
Get the App Signup / Login
Sign in Open App
Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Test: Singly Excited Magnetic System - Electrical Engineering (EE) MCQ

Test: Singly Excited Magnetic System - Electrical Engineering (EE) MCQ


Test Description

10 Questions MCQ Test - Test: Singly Excited Magnetic System

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

For a toroid to extract the energy from the supply system, the flux linkages of the magnetic field must be ________

Detailed Solution for Test: Singly Excited Magnetic System - Question 1

dWelec = idφ = eidt, where dWelec = differential electrical energy to coupling field, and if the flux linkages are either constant or zero, i.e, dφ = 0, then dWelec = 0.

Test: Singly Excited Magnetic System - Question 2
Save

The energy stored in a magnetic field is given by ____________ where L = self-inductance and Rl=reluctance.

Detailed Solution for Test: Singly Excited Magnetic System - Question 2

We know that Wfld = 1/2 φi and L = φ/i, thus Wfld = 1/2 Li2.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Singly Excited Magnetic System - Question 3
Save

For a linear electromagnetic circuit, which of the following statement is true?

Detailed Solution for Test: Singly Excited Magnetic System - Question 3

Wfld = Wfld1 = 1/2 φ*i = 1/2 F*∅.

Test: Singly Excited Magnetic System - Question 4
Save

The electromagnetic force developed in any physical system acts in such a direction as to tend to _____________
Detailed Solution for Test: Singly Excited Magnetic System - Question 4

fe = (∂Wfld1 (i,x))/∂x = (∂Wfld1 (F,x))/∂x, the positive sign before ∂Wfld1 indicates that force fe acts in a direction as to tend to increase the co-energy at constant mmf.

Test: Singly Excited Magnetic System - Question 5
Save

The electromagnetic torque developed in any physical system, and with magnetic saturation neglected, acts in such a direction as to tend to ____________
Detailed Solution for Test: Singly Excited Magnetic System - Question 5

fe = 1/2 ∅2 dRl/dx, Te = -1/2 ∅2 dRl/dθ = 1/2 i2 dL/dθ.

Test: Singly Excited Magnetic System - Question 6
Save

Magnetic stored energy density for iron is given by ______
Detailed Solution for Test: Singly Excited Magnetic System - Question 6

Magnetic stored energy density for iron is given as
wfld = Wfld/((Length of the magnetic path through Iron)*(Iron area normal to the magnetic flux)) = 1/2 (F∅)/(length*Area) = 1/2 F/length ∅/area = 1/2 H*B
Also, H = B/μ,thus wfld = 1/2 B2/μ.

Test: Singly Excited Magnetic System - Question 7
Save

When a current of 5A flows through a coil of linear magnetic circuit, it has flux linkages of 2.4 wb-turns. What is the energy stored in the magnetic field of this coil in Joules?
Detailed Solution for Test: Singly Excited Magnetic System - Question 7

Wfld = 1/2 φ*i = 1/2*2.4*5 = 6 Joules.

Test: Singly Excited Magnetic System - Question 8
Save

The electromagnetic force and/or torque, developed in any physical system, acts in such a direction as to tend to ____________
Detailed Solution for Test: Singly Excited Magnetic System - Question 8

fe = -(∂Wfld (φ, x))/∂x = -(∂Wfld (∅,x))/∂x and Te = -(∂Wfld(φ,θ))/∂θ = -(∂Wfld (∅,θ))/∂θ
The negative sign before ∂Wfld indicates that fe acts in a direction as to tend to decrease the stored energy at constant mmf.

Test: Singly Excited Magnetic System - Question 9
Save

Consider a magnetic relay with linear magnetization curve in both of its open and closed position. What happens to the electrical energy input to the relay, when the armature moves slowly from open position to closed position?
Detailed Solution for Test: Singly Excited Magnetic System - Question 9

For the above mentioned case, Wfld = Wmech and Wfld = Welec/2 hence, option “c” is the correct answer.

Test: Singly Excited Magnetic System - Question 10
Save

Electromagnetic force and/or torque developed in any physical system, acts in such a direction as to tend to ____________
Detailed Solution for Test: Singly Excited Magnetic System - Question 10

fe = (∂Wfld1(i,x))/∂x = (∂Wfld(i,x))/∂x.

Information about Test: Singly Excited Magnetic System Page
In this test you can find the Exam questions for Test: Singly Excited Magnetic System solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Singly Excited Magnetic System, 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 Singly Excited Magnetic System

Find all the important questions for Singly Excited Magnetic System at EduRev.Get fully prepared for Singly Excited Magnetic System with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Singly Excited Magnetic System 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 Singly Excited Magnetic System resources.

Singly Excited Magnetic System MCQs with Answers

Prepare for the Singly Excited Magnetic System 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 Singly Excited Magnetic System

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 Singly Excited Magnetic System with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup