Electrical Machines A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is 40 V. 60 V. 0 V. 20 V. 40 V. 60 V. 0 V. 20 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________. kept constant to certain value. increased. remains unchanged. decreased. kept constant to certain value. increased. remains unchanged. decreased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following voltage regulator is preferred for providing large values of load current? Transistor series regulator. Transistor shunt regulator. Zener diode shunt regulator. None of these Transistor series regulator. Transistor shunt regulator. Zener diode shunt regulator. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following speed control of DC motor the speed obtained is below than the rated speed? Armature circuit resistance control. Armature voltage control. Any of above. Field resistance control. Armature circuit resistance control. Armature voltage control. Any of above. Field resistance control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Regenerative braking is not found in which motor? DC series. DC compound. Induction motor. DC shunt. DC series. DC compound. Induction motor. DC shunt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of Armature current. Field current. None of above. Line current. Armature current. Field current. None of above. Line current. ANSWER DOWNLOAD EXAMIANS APP
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