Electrical Machines In an induction motor, air gap power is 10 Kw and mechanically developed power is 8 Kw. What are the rotor ohmic losses? 1.5KW 0.5Kw 3KW 2KW 1.5KW 0.5Kw 3KW 2KW ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of these types of motor is used in elevators? DC shunt motor. DC compound motor. DC series motor. None of these. DC shunt motor. DC compound motor. DC series motor. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field to an AC source. in reverse. to a DC source. to earth. to an AC source. in reverse. to a DC source. to earth. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature shaft must be able to with stand All of these Any unbalanced magnetic pull on the armature core. Bending moment due to weight of the armature. Twisting stains due to transmission of torque. All of these Any unbalanced magnetic pull on the armature core. Bending moment due to weight of the armature. Twisting stains due to transmission of torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is 50 V zero 40 V 20 V 50 V zero 40 V 20 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be 75 W 168.75 W 112.5 W 50 W 75 W 168.75 W 112.5 W 50 W ANSWER DOWNLOAD EXAMIANS APP
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