Electrical Machines For a 3-phase, 4 pole, 50 Hz synchronous motor the frequency, pole number and the frequency are halved. The motor speed will be 1500 rpm 75 rpm 375 rpm 3000 rpm 1500 rpm 75 rpm 375 rpm 3000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power of a dc motor is given by EbIa2. EbIa. EIa. none of these. EbIa2. EbIa. EIa. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the necessity of copper brushes in a dc motors? To absorb the mechanical shocks produced during running condition. None of these. To increase the flux cutting by the rotor. To convert alternating supply current to direct current. To absorb the mechanical shocks produced during running condition. None of these. To increase the flux cutting by the rotor. To convert alternating supply current to direct current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors is/are widely used? None of these squirrel cage induction motor slip ring induction motor either of these None of these squirrel cage induction motor slip ring induction motor either of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 stack stepper motor has 12 teeth on stator as well as on rotor. Determine the step size when each stack excited? 45°. 30°. 10°. 24°. 45°. 30°. 10°. 24°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Variation in speed by ward-Leonard control of DC motors occurs due to variation in Armature voltage. Supply voltage. Field excitaion. Armature current. Armature voltage. Supply voltage. Field excitaion. Armature current. ANSWER DOWNLOAD EXAMIANS APP
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