Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/2. PN/3000. PN/60. PN/120. PN/2. PN/3000. PN/60. PN/120. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? 30 Hz. 35 Hz. 20 Hz. Can be determined. 30 Hz. 35 Hz. 20 Hz. Can be determined. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalanced supply voltage given to a 3 - φ, delta connected induction motor will cause less heating of the rotor. negative sequence current. all of these. less heating of the rotor. less heating of the rotor. negative sequence current. all of these. less heating of the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The ventilating ducts in most of DC machine are none of these. longitudinal. radial as well as longitudinal. radial. none of these. longitudinal. radial as well as longitudinal. radial. 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. 150 V. 240 V. 220 V. 280 V. 150 V. 240 V. 220 V. 280 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machine will have maximum efficiency? Induction motor. DC motor. Electrical power transformer. Electrical power generator. Induction motor. DC motor. Electrical power transformer. Electrical power generator. ANSWER DOWNLOAD EXAMIANS APP
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