a) It makes distribution of the flux density across both sections unequal b) It inclines lines of force through the air gap such that they do not remain radial. c) Both (a) and (b) d) None of these Ans: (c)
a) Proportional to temperature b) Constant c) Proportional to armature current d) Inversely proportional to armature current Ans:(c)
a) 1500 rpm b) 3000 rpm c) Infinity d) Zero Ans:(c)
a) Compound motor b) Shunt motor c) Series motor d) None of these Ans:(c)
a) To change alternating voltage to direct voltage b) To change a.c. to d.c. c) To improve commutation d) For easy speed control Ans:(a)
a) For mechanical balance of armature b) Eliminate armature reaction c) Eliminate reactance voltage d) None of these Ans:(a)
a) Motor will start action as a generator b) Motor will stop c) Windings will burn due to high armature current d) Nothing will happen Ans:(c)
a) To increase the field current b) Not to affect the current through hold on coil even if any change in field current takes place c) To increase the field current d) None of these Ans:(b)
a) Parabola b) Rectangular hyperbola c) Linear d) None of these Ans:(b)
a) Field terminals b) Voltage terminals c) Both (a) and (b) d) None of these Ans:(c)