Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase supply voltage rotor resistance None of these supply frequency supply voltage rotor resistance None of these supply frequency ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loop represents the area of copper loss hysteresis loss eddy current loss total iron losses copper loss hysteresis loss eddy current loss total iron losses ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is minimum maximum zero All of these minimum maximum zero All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 400 A. 40 A. 44 A. 440 A. 400 A. 40 A. 44 A. 440 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 400 / 200 V, Y - Y connected wound rotor induction motor has 0.06 Ω rotor resistance and 0.3 Ω standstill reactance per phase. To make the starting torque equal to maximum torque of the motor the additional resistance required 0.45 Ω. 0.78 Ω. 0.66 Ω. 0.24 Ω. 0.45 Ω. 0.78 Ω. 0.66 Ω. 0.24 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 975 rpm 1000 rpm 940 rpm 950 rpm 975 rpm 1000 rpm 940 rpm 950 rpm ANSWER DOWNLOAD EXAMIANS APP
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