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problem 1: Describe the construction and working principle of D.C generator? Why commutator and brush arrangement essential for the operation of a D.C generator?

problem 2: Describe the types of D.C motors?

problem 3: Draw a detailed sketch of D.C. machine and recognize the different parts. In brief describe the function of each main part.

problem 4: Derive an expression for the speed of a D.C. motor in terms of back emf and flux per pole.

problem 5: Describe speed current and speed torque characteristics of the D.C. shunt motor.

problem 6: Describe constructional features and working principles of the D.C. generator.

problem 7: Derive the expression of induced emf of D.C. generator.

problem 8: An 8 pole lap wound D.C. generator consists of 960 conductors; a flux of 40 milli Weber’s and is driven at 400 r.p.m. Determine the induced emf.

problem 9: What are the various applications of a D.C motor and D.C generator?

problem 10: Describe about three point starter?

Electrical & Electronics, Engineering

• Category:- Electrical & Electronics
• Reference No.:- M93245

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