Electrical Machines A shunt generator has a critical field resistance of 300 Ω at a speed of 800 rpm if the speed is raised to 1000 rpm the critical field resistance is 150 Ω. 375 Ω. 145 Ω. 225 Ω. 150 Ω. 375 Ω. 145 Ω. 225 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What will be the eddy current loss if the supply frequency of a transformer becomes double? Four times. Eight times. Remains same. Doubled. Four times. Eight times. Remains same. Doubled. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, the frequency of a voltage at the secondary is equal to primary. greater than the primary. any of the above. less than primary. equal to primary. greater than the primary. any of the above. less than primary. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The three point starter is used for Shunt, compound and series motor. Shunt motor. Shunt motor as well as compound motors. Series motor. Shunt, compound and series motor. Shunt motor. Shunt motor as well as compound motors. Series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of bearing is provided in small induction motors to support the rotor shaft? Bush bearings. Ball bearings. None of these Cast iron bearings. Bush bearings. Ball bearings. None of these Cast iron bearings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for voltage build up in self excited generator? Poles should contain residual flux. All of these Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. Poles should contain residual flux. All of these Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. ANSWER DOWNLOAD EXAMIANS APP
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