Electrical Machines In a transformer which of the following losses are zero? Copper loss Iron loss Rotational loss All of these Copper loss Iron loss Rotational loss All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 5 Hz 1 Hz 0 Hz 50 Hz 5 Hz 1 Hz 0 Hz 50 Hz 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. deteriorate and the speed falls. deteriorate and the speed rises. improve and the speed rises. improve and the speed falls. deteriorate and the speed falls. deteriorate and the speed rises. improve and the speed rises. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The emf induced in the dc generator armature winding is None of these DC AC AC and DC None of these DC AC AC and DC ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a DC cummulative compound wound motor is loaded Torque increase and speed decrease. Torque decrease and speed increases. Both torque and speed decrease. Torque and speed both increase. Torque increase and speed decrease. Torque decrease and speed increases. Both torque and speed decrease. Torque and speed both increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If input of a transformer is square wave the output will be triangular wave. square wave. sine wave. pulsed wave. triangular wave. square wave. sine wave. pulsed wave. ANSWER DOWNLOAD EXAMIANS APP
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