Electrical Machines In a transformer zero voltage regulation is achieved at a load power factor which is unity leading lagging zero unity leading lagging zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The no load and full load speed of DC mototr are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor? 15.30%. 18.25%. 16.67%. 14.28%. 15.30%. 18.25%. 16.67%. 14.28%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In shunt dc motor the direction of rotation of the motor will reversed. When either field terminals are reversed or armature terminals are reversed. only field terminals are changed. none of above. only armature terminals are reversed. either field terminals are reversed or armature terminals are reversed. only field terminals are changed. none of above. only armature terminals are reversed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field weakening method is also called as-----------? constant torque control constant current control constant voltage control constant power control constant torque control constant current control constant voltage control constant power control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Magnetic field of a DC generator is produced by what? Electromagnets. Both B and C. Permanent magnets. None of the options. Electromagnets. Both B and C. Permanent magnets. None of the options. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a three phase induction motor has an impedance of 0.4 + j4 ohm per phase at standstill the maximum torque occurs at a slip of _____________. 15 %. 50 %. 10 %. 25 %. 15 %. 50 %. 10 %. 25 %. ANSWER DOWNLOAD EXAMIANS APP
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