Electrical Machines If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by KefKf2Bm2. Kef2Kf2Bm. Kef2KfBm2. Kef2Kf2Bm2. KefKf2Bm2. Kef2Kf2Bm. Kef2KfBm2. Kef2Kf2Bm2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Speed of DC motor can be controlled by varying its flux oer pole. applied voltage. resistance of armature culture. all of these. its flux oer pole. applied voltage. resistance of armature culture. all of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Scott connections are used for single phase to three phase transformation. three phase to single phase transformation. three phase to two phase transformation. any of the above. single phase to three phase transformation. three phase to single phase transformation. three phase to two phase transformation. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On which of the following factor/factors the speed of a DC motor depends upon? Armature current. Applied voltage. All of these. Field flux. Armature current. Applied voltage. All of these. Field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Direct-on-line (DOL) starters are not suitable for starting large DC motors, because the motor may not start. the starting current will be enormously high. the starting torque becomes low. the motor may run away. the motor may not start. the starting current will be enormously high. the starting torque becomes low. the motor may run away. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency? 95% 94% 92% 96% 95% 94% 92% 96% ANSWER DOWNLOAD EXAMIANS APP