Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is cross – magnetizing. demagnetizing. ineffective. magnetizing. cross – magnetizing. demagnetizing. ineffective. magnetizing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What does the use the of height flux density value in transformer design lead to? Reduced copper loss. Increase in weight/KVA. Reduced iron loss. Decrease in weight/KVA. Reduced copper loss. Increase in weight/KVA. Reduced iron loss. Decrease in weight/KVA. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by f / s. s2. sf / 2. sf. f / s. s2. sf / 2. sf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field winding connection of DC shunt motor is changed It will run in same direction. motor will not run. motor will become slow. It will run in opposite direction. It will run in same direction. motor will not run. motor will become slow. It will run in opposite direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor power output of 3-phase induction motor is 15 KW. The rotor copper losses at a slip of 4% will be 650 W 600 W 700 W 625 W 650 W 600 W 700 W 625 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is power factor of a 3 - φ induction motor at no load? High. Equal to 1. Low. Same as full load. High. Equal to 1. Low. Same as full load. ANSWER DOWNLOAD EXAMIANS APP
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