Electrical Machines For pure resistive load what is the armature reaction? demagnetization cross magnetization All of these magnetization demagnetization cross magnetization All of these magnetization ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The supply voltage to an induction motor is reduced by 10%. By what percentage, approximately, will the maximum torque decrease? 5% 40% 19% 10% 5% 40% 19% 10% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in dc machine provide ----------------- rectification? half wave full wave full wave controlled half wave controlled half wave full wave full wave controlled half wave controlled ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the pitch factor? sin (α/2) Cos α² Cos (α/2) Cos α sin (α/2) Cos α² Cos (α/2) Cos α ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf of a DC machine has stepped distribution and rotates at the speed of armature. trapezoidal space distribution and is stationary in space. triangular space distribution and is stationary in space. triangular space distribution and rotates at the speed of armature. stepped distribution and rotates at the speed of armature. trapezoidal space distribution and is stationary in space. triangular space distribution and is stationary in space. triangular space distribution and rotates at the speed of armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 59.2%. 48.0%. 88.8%. 57.1%. 59.2%. 48.0%. 88.8%. 57.1%. ANSWER DOWNLOAD EXAMIANS APP
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