Electrical Machines A dc shunt motor has external resistance Ra and Rf in the armature and field circuits respectively. Armature current at starting can be reduced by keeping Rf maximum and Ra minimum Ra minimum and Rf minimum Ra maximum and Rf maximum Ra maximum and Rf minimum Rf maximum and Ra minimum Ra minimum and Rf minimum Ra maximum and Rf maximum Ra maximum and Rf minimum ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What will happen if the the supply terminals are reversed in case of a DC shunt motor? The motor will stop. The motor will run in reverse direction. The motor will run at its normal speed in the same direction as before. The motor will run much faster in the same direction. The motor will stop. The motor will run in reverse direction. The motor will run at its normal speed in the same direction as before. The motor will run much faster in the same direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 5% 2% 4% 25% 5% 2% 4% 25% 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 in reverse. to earth. to a DC source. to an AC source. in reverse. to earth. to a DC source. to an AC source. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Generator works on the principle of production static induced emf. both A and B. None of these dynamically induced emf. static induced emf. both A and B. None of these dynamically induced emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 201.02 V. 210 V. 205 V. 212 V. 201.02 V. 210 V. 205 V. 212 V. ANSWER DOWNLOAD EXAMIANS APP
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