Maurice Tutor

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About Maurice Tutor

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Expertise:
Algebra,Applied Sciences See all
Algebra,Applied Sciences,Biology,Calculus,Chemistry,Economics,English,Essay writing,Geography,Geology,Health & Medical,Physics,Science Hide all
Teaching Since: May 2017
Last Sign in: 398 Weeks Ago, 2 Days Ago
Questions Answered: 66690
Tutorials Posted: 66688

Education

  • MCS,PHD
    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

Experience

  • Professor
    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 21 Mar 2018 My Price 4.00

D.C. motor

16.(a) Derive an expression for the torque developed in the armature of a D.C. motor.(8) (b) Determine developed torque and shaft torque of 220V, 4 pole series motor with 800 conductors wave-connected supplying a load of 8.2 kW by taking 45A from the mains. The flux per pole is 25m/Wb and its armature circuit resistance is 0.6?. (8) 17.With the help of neat circuit diagram, explain Hopkinson’s test and derive the relations for efficiency (both for generator and motor)also state the merits and demerits of this method. (16) 18. (a) Explain in detail about different methods of excitation. (8) (b) Derive the expression for efficiency of D.C. machines.

Answers

Maurice Tutor
(5)
Status NEW Posted 21 Mar 2018 06:03 AM My Price 4.00

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