Electrical Machines In a DC Motor 3 point starter is used to all of above. provide overload protection. limit the starting current to a safer value. provide protection against Low-Voltage. all of above. provide overload protection. limit the starting current to a safer value. provide protection against Low-Voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 50 Hz 100 Hz 0 Hz 25 Hz 50 Hz 100 Hz 0 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine shape of main field flux distribution is? flat tapped or trapezoidal triangular saddle shape peaky in nature flat tapped or trapezoidal triangular saddle shape peaky in nature ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? By varying number of poles. By varying the supply frequency. Both (A) and (B). By varying supply voltage. By varying number of poles. By varying the supply frequency. Both (A) and (B). By varying supply voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole, 3-phase induction motor is running at 4% slip at full load. If the speed of the motor is 720 rpm, the supply frequency is 50 Hz 25 Hz 40 HZ 60 Hz 50 Hz 25 Hz 40 HZ 60 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Induction motors provided with open slots have less breakdown torque. more breakdown torque. higher efficiency. leading power factor. less breakdown torque. more breakdown torque. higher efficiency. leading power factor. ANSWER DOWNLOAD EXAMIANS APP
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