Electrical Machines A 8 pole, 50 Hz single phase induction motor is running at 690 rpm. Its slip with respect to forward field is 1.92 0.08 -1.92 -0.08 1.92 0.08 -1.92 -0.08 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to f V2 f2 V f V2 f2 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator the emf generated by the armature is maximum when induced voltage is high. rate of change of flux is minimum. shaft rotation is high. rate of change of flux is maximum. induced voltage is high. rate of change of flux is minimum. shaft rotation is high. rate of change of flux is maximum. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dummy coils are used for increasing efficiency. mechanical balancing. All of these reducing armature reaction. increasing efficiency. mechanical balancing. All of these reducing armature reaction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two generators G1 and G2 are to be operated in parallel to deliver a total current of 60 A. Generator one has a terminal voltage of 280 V on no load and 240 V when supplying 40 A current. Similarly the second generator has a voltage of 300 V when on no load and 240 V when supplying of 50 A of current. The output voltage of each generator will be 238.2 V. 271.7 V. 240 V. 256.4 V. 238.2 V. 271.7 V. 240 V. 256.4 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Due to magnetic saturation, the flux per pole in a DC machine without brush shift increases in generators but decreases in motor with load. decreases in both generators and the motors with load. decreases in generators and increases in motor with load. increases in both the generators and the motors with load. increases in generators but decreases in motor with load. decreases in both generators and the motors with load. decreases in generators and increases in motor with load. increases in both the generators and the motors with load. ANSWER DOWNLOAD EXAMIANS APP
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