Electrical Machines A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ? 210 V 230 V. 150 V. 240 V. 210 V 230 V. 150 V. 240 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine 6 pole wave winding is used. The number of parallel paths are? 6 4 1 2 6 4 1 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lamination of transformer core is made of cast steel. wrought iron. silicon steel. cast iron. cast steel. wrought iron. silicon steel. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is zero 50 V 20 V 40 V zero 50 V 20 V 40 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The crawling in the induction motor is caused by low voltage supply harmonics developed in the motor improper design of stator laminations high loads low voltage supply harmonics developed in the motor improper design of stator laminations high loads ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be 75 W 112.5 W 168.75 W 50 W 75 W 112.5 W 168.75 W 50 W ANSWER DOWNLOAD EXAMIANS APP
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