Electrical Machines A dc motor with armature resistance of 0.5 ohms connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is 250 A. 570 A. 460 A. 340 A. 250 A. 570 A. 460 A. 340 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A simple method of increasing the voltage of a DC generator is to increase the speed of shaft rotation. increase the number of turns in field coil. increase the source frequency. increase the number of turns in armature coil. increase the speed of shaft rotation. increase the number of turns in field coil. increase the source frequency. increase the number of turns in armature coil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power will be developed when back emf is double the supply voltage. equal to supply voltage. half of the supply voltage. All of these double the supply voltage. equal to supply voltage. half of the supply voltage. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature core of a DC machine is laminated to minimise temperature rise hysteresis loss mechanical loss eddy-current loss temperature rise hysteresis loss mechanical loss eddy-current loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines High starting torque and low starting current is the advantage of slip ring induction motor. stepper motor. hysteresis motor. squirrel cage induction motor. slip ring induction motor. stepper motor. hysteresis motor. squirrel cage induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Variation in speed by ward-Leonard control of DC motors occurs due to variation in Armature current. Field excitaion. Supply voltage. Armature voltage. Armature current. Field excitaion. Supply voltage. Armature voltage. ANSWER DOWNLOAD EXAMIANS APP
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