Electrical Machines In DC machine torque depends on which of the following? flux (φ) armature current (I) both A and B speed flux (φ) armature current (I) both A and B speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then Pe will increase but Ph will decrease Ph will decrease but Pe will remain same Ph will increase but Pe will decrease both hysteresis loss(Ph) and eddy current loss(Pe) will increase Pe will increase but Ph will decrease Ph will decrease but Pe will remain same Ph will increase but Pe will decrease both hysteresis loss(Ph) and eddy current loss(Pe) will increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A. 220 V. 240 V. 280 V. 150 V. 220 V. 240 V. 280 V. 150 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator on no-load, the air gap flux distribution in space is triangular. sinusoidal. pulsating. flat topped. triangular. sinusoidal. pulsating. flat topped. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is expensive for same Kw output rates? Induction motor. DC Shunt Motor AC single phase motor. Synchronous motor. Induction motor. DC Shunt Motor AC single phase motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 1/√5 2/√5 1/√2 1/3 1/√5 2/√5 1/√2 1/3 ANSWER DOWNLOAD EXAMIANS APP
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