Electrical Machines If the excitation is reduced, the power factor is leading power factor None of these lagging power factor unity power factor leading power factor None of these lagging power factor unity power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as crawling. cogging. relative speed. air gap. crawling. cogging. relative speed. air gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase 6 pole 50 Hz induction motor is running at 5% slip.What is the speed of the motor? 900 rpm 950 rpm 1000 rpm 850 rpm 900 rpm 950 rpm 1000 rpm 850 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor electromagnetic torque developed is None of above. Proportional to the square of armature current. Proportional to the armature current. Inversely proportional to the armature current. None of above. Proportional to the square of armature current. Proportional to the armature current. Inversely proportional to the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding All of these results in reduced axial length of the machine. results in reduced leakage reactance. make it stiffer. All of these results in reduced axial length of the machine. results in reduced leakage reactance. make it stiffer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines R1 is the resistance of the primary winding of the transformer. The turn ratio in terms of primary to secondary is K. Then the equivalent resistance of the primary referred to secondary is R1 /K² R1 /K K×R1 K²R1 R1 /K² R1 /K K×R1 K²R1 ANSWER DOWNLOAD EXAMIANS APP
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