Electrical Machines A 4 pole, 3-phase induction motor is running at 4% slip at full load. If the speed of the motor is 720 rpm, the supply frequency is 40 HZ 50 Hz 60 Hz 25 Hz 40 HZ 50 Hz 60 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the brushes remain in contact with conductors which lie in the inter polar gaps. there is no hard and fast rule for this. lie under south pole. lie under north pole. lie in the inter polar gaps. there is no hard and fast rule for this. lie under south pole. lie under north pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the excitation of normally operating unloaded, salient pole synchronous motor suddenly gets disconnected, it continues to run as a switched reluctance motor. variable reluctance motor. induction motor. DC motor. switched reluctance motor. variable reluctance motor. induction motor. DC motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The supply voltage to an induction motor is reduced by 10%. By what percentage, approximately, will the maximum torque decrease? 40% 5% 19% 10% 40% 5% 19% 10% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flux density under trailing pole tips in case of generator will increase None of these either increase or decrease decrease increase None of these either increase or decrease decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC motor can be determent by Flemings left hand rule. Flemings right hand rule. Amperes law. Lenzs law. Flemings left hand rule. Flemings right hand rule. Amperes law. Lenzs law. ANSWER DOWNLOAD EXAMIANS APP
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