Electrical Machines A 3-phase, alternator has generated emf per phase of 230 V with 10% 3rd harmonic and 6% 5th harmonic content. Calculate rms line voltage for star connection. 50 V. 399 V. 230.2 V. 100 V. 50 V. 399 V. 230.2 V. 100 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward Leonard control provides speed control in both direction. above rated speed. in one direction only. below rated speed. in both direction. above rated speed. in one direction only. below rated speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of motors are preferred in lifts? DC shunt motors. DC series motors. None of these DC compound motors. DC shunt motors. DC series motors. None of these DC compound motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will improve with rise in terminal voltage. improve with fall of terminal voltage. deteriorate with rise in terminal voltage. deteriorate with fall of terminal voltage. improve with rise in terminal voltage. improve with fall of terminal voltage. deteriorate with rise in terminal voltage. deteriorate with fall of terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of conductor of a DC motor can be determined by Fleming's left hand rule. Lenz's law. Fleming's right hand rule. Ampere law. Fleming's left hand rule. Lenz's law. Fleming's right hand rule. Ampere law. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The starting resistance of DC motor is generally Low. around 500 ohms. Infinitely large. 1000 ohms. Low. around 500 ohms. Infinitely large. 1000 ohms. ANSWER DOWNLOAD EXAMIANS APP
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