Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is 2.56 %. 4.76%. 3.76%. 2.57 %. 2.56 %. 4.76%. 3.76%. 2.57 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loss is proportional to f. f2. f1.5. f3. f. f2. f1.5. f3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Universal motors are used in cranes All of these traction food processing cranes All of these traction food processing ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the armature current of 5 Amp is flowing through the dc motor the torque produced is 47 Nm. Keeping the speed constant if the armature current is increased to 7 amp, calculate the new torque. Assume losses to be constant. 38.5 Nm. 27.73 Nm . 65.8 Nm. 74 Nm. 38.5 Nm. 27.73 Nm . 65.8 Nm. 74 Nm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC motor, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will improve and the speed falls. improve and the speed rises. deteriorate and the speed falls. deteriorate and the speed rises. improve and the speed falls. improve and the speed rises. deteriorate and the speed falls. deteriorate and the speed rises. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronising power of a synchronous motor varies inversely as 1/Xs directly as synchronous reactances Xs All of these directly as Xs2 inversely as 1/Xs directly as synchronous reactances Xs All of these directly as Xs2 ANSWER DOWNLOAD EXAMIANS APP
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