ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electrical Engineering
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3070)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3286)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13320)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2362)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (414)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (79)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (163)
 Instrumentation interview questions  Instrumentation Interview Questions (2374)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (106)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (43)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (75)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1195)
Question
what is the difference between electrical degree n
mechanical degree?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Mechanical degrees: the degree of physical or mechanical
rotation a single conductor in an alternator.

Electrical degrees: the degree or the cycle of emf induced
in a single conductor in an alternator

Consider a Two pole Alternator, when a conductor rotates in
the feild, the emf induced in the conductor will be maximum
when the conductor is at the center of the pole and the emf
induced will be minimum when the conductor is in the middle
of the gap between the two poles. so when we consider the
graph of the induced emf versus the position or degree of
rotation. For one complete rotation of the condutor in the
feild - One complete cycle of emf is generated in the
conductor (Positive half cycle at south pole and negative
halfcycle at north pole).

The same way when we consider a 4 pole alternator a single
conductor when completing one mechanical rotation will
cross the four poles there by giving the induced emf graph
with two positive half cycles and two negative halfcycles
which gives us two complete cycles of induced emf.

So for One Mechanical rotation (360 degrees) the induced
emf completes two cycles (360 * 2 = 720 degrees in terms of
the sine wave)

So the relation between Electrical and Mechanical degrees
can be written as

Elect. Degrees = (N0. of Poles / 2) * Mech. Degrees

Source: Elecrical Machinary by P.S.Bimbhra
 
Is This Answer Correct ?    111 Yes 8 No
Pavan
 
Answer
# 2
electrical angle is angle of out sin wave (emf) genrated by
rotor in corrosponding to actual rotation. In two pole
configuration conductor comes under north pole for every 90
degree rotation .so for 360 degree output sin wave cover
360 means one complete cycle but in 4 pole configuration
for 360 degree actual rotation produce 2 cycle of sin wave
so here electrical dgree is double of mechanical dgree .

electrical dgree= p/2 mechanical degree
 
Is This Answer Correct ?    0 Yes 0 No
Sunny Singh
 
 
 
Answer
# 3
1deg mech =( p/2)×electrical deg 
Is This Answer Correct ?    3 Yes 18 No
Bijay Kumar Sutar
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
Necessity of transformer earthing   1
What is harmonics. How does it get generated and means to arrest harmonics Airtel 8
what will happen at secondary side of transformer if i increase voltage at primary side?while V1*I1=V2*I2 will secondary voltage or current increase?   2
what should be 3phase motor capacity or rating to connect in star connection. what should be 3phase motor capacity or rating to connect in delta connection. what should be 3phase motor capacity or rating to connect in star delta connection   1
Sir Power transformer :- (in generating station) Alternator terminals side - Delta HT transmission line side - Star Why? Kirloskar 3
Selection criteria for Vector group in power / distribution transformer. ABC 1
Explain types soft starters? TCS 7
I am an electrical engg and has got selected in wipro should i go there now or try in some core company ? Wipro 3
assume we are put both df/dt and vector surge relay in same bus the df/dt relay setting is +5 hz an -5HZ. we want operat the vector surge relay before the df/dt how i calculate the setting of the vector surge relay.   1
Which type of DC generator is used for electric welding purposes and why?   1
whats was the problem if neutral and earth got 2volt from the ups output   1
how to create new innovation what are the supporting sources in the electrical field for Electrical engineers.....?   1
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright © 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com