- (A) back e.m.f.
- (B) armature current
- (C) power factor
- (D) torque angle
Electrical Engineering Mcqs
- (A) 60 to 70%
- (B) 75 to 80%
- (C) 85 to 95%
- (D) 99 to 99.5%
- (A) Periodic variation of load
- (B) Over-excitation
- (C) Over-loading for long periods
- (D) Small and constant load
- (A) power factor as well as armature current will decrease
- (B) power factor as well as armature current will increase
- (C) power factor will increase but armature current will decrease
- (D) power factor will decrease and armature current will increase
- (A) the increased load has to take more current
- (B) the rotor by shifting its phase backward causes motor to take more current
- (C) the back e.m.f. decreases causing an increase in motor current
- (D) the rotor strengthens the rotating field casuing more motor current
- (A) zero
- (B) 45°
- (C) 90°
- (D) 120°
- (A) the motor stops
- (B) it runs as a reluctance motor at the same speed
- (C) it runs as a reluctance motor at a lower speed
- (D) none of the above
- (A) under-loaded
- (B) over-loaded
- (C) under-excited
- (D) over-excited
- (A) alternator type machines
- (B) induction type machines
- (C) salient pole type machines
- (D) smooth cylindrical type machines
- (A) gear train arrangement
- (B) transmission of mechanical power by shaft
- (C) distribution transformer
- (D) turbine
- (E) none of the above
