Electrical Machines The functions of inter poles are nullify reactance voltage and improve the commutation. both 1 and 2 None of these reduce cross magnetization effect and improve commutation nullify reactance voltage and improve the commutation. both 1 and 2 None of these reduce cross magnetization effect and improve commutation ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machines have highest power factor with respect to magnetizing current? Semi closed slot type machine. Open slot type machines. Closed slot type machines. Any of the above. Semi closed slot type machine. Open slot type machines. Closed slot type machines. Any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW? 48 Hz 50 Hz 48.5 Hz 45 HZ 48 Hz 50 Hz 48.5 Hz 45 HZ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1.0 Ω and armature current is 10 A. of the excitation of the machine is reduced by 10%, the extra resistance to be put in the armature circuit to maintain the same speed and torque will be 3.1 Ω 1.8 9 Ω 1.79 Ω 2 .1 Ω 3.1 Ω 1.8 9 Ω 1.79 Ω 2 .1 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine current and emf at the terminals are alternating. current and emf in armature are alternating. current and emf in armature are unidirectional emf in armature conductors and at the terminals is alternating. current and emf at the terminals are alternating. current and emf in armature are alternating. current and emf in armature are unidirectional emf in armature conductors and at the terminals is alternating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature core of the rotor bars of dc motors are laminated to provide better flux linkage. to reduce eddy current loss. to reduce hysteresis loss. to reduce mechanical losses. to provide better flux linkage. to reduce eddy current loss. to reduce hysteresis loss. to reduce mechanical losses. ANSWER DOWNLOAD EXAMIANS APP
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