Electrical Machines If the load current and the flux of a DC motor are held constant and voltage applied across its armature is increased by 5%, the speed of the motor will remain unchanged. depend on other factors. reduce by 5 %. increase by 5 %. remain unchanged. depend on other factors. reduce by 5 %. increase by 5 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Due to magnetic saturation, the flux per pole in a DC machine without brush shift increases in both the generators and the motors with load. decreases in generators and increases in motor with load. increases in generators but decreases in motor with load. decreases in both generators and the motors with load. increases in both the generators and the motors with load. decreases in generators and increases in motor with load. increases in generators but decreases in motor with load. decreases in both generators and the motors with load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor when started on no load does not accelerate up to full speed but runs at 1/7th of the rated speed. The motor is said to be locking. crawling. cogging. plugging. locking. crawling. cogging. plugging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a star - delta starting of an IM applied voltage per stator phase is 57.7 % of a line volt line voltage is 57.7 % of stator voltage. reduced voltage is applied to the stator. resistance is inserted in the rotor. applied voltage per stator phase is 57.7 % of a line volt line voltage is 57.7 % of stator voltage. reduced voltage is applied to the stator. resistance is inserted in the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In electric locomotives which of the following motor are used ? DC series motor. Synchronous motor. DC compound motor. DC Shunt motor. DC series motor. Synchronous motor. DC compound motor. DC Shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator if field winding attains the critical resistance machine will generate maximum voltage. field winding will burn. machine will generate maximum power. the voltage generated will be zero. machine will generate maximum voltage. field winding will burn. machine will generate maximum power. the voltage generated will be zero. ANSWER DOWNLOAD EXAMIANS APP
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