Electrical Machines When the mechanical power is developed by a DC motor maximum Back emf is equal to half of applied voltage. None of above. Back emf is equal. back emf is equal to applied voltage. Back emf is equal to half of applied voltage. None of above. Back emf is equal. back emf is equal to applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________. decreased. remains unchanged. increased. kept constant to certain value. decreased. remains unchanged. increased. kept constant to certain value. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lamination of core are generally made of cast iron. carbon. stainless steel. silicon steel. cast iron. carbon. stainless steel. silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The back emf produced in a dc motor depends on P and Z. P. Z. none of these. P and Z. P. Z. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole lap wound dc generator has 4 brushes, if one of the brush is damaged, what will be the change in V, I and P ratings V/2, I and P/2 V, I and P V/2, I/2 and P/4 V, I/2 and P/2 V/2, I and P/2 V, I and P V/2, I/2 and P/4 V, I/2 and P/2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of single phase induction motor is having the highest power factor at full load ? Shaded pole type. Capacitor run type. Capacitor start. Split phase type. Shaded pole type. Capacitor run type. Capacitor start. Split phase type. ANSWER DOWNLOAD EXAMIANS APP
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