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?