Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase supply frequency None of these supply voltage rotor resistance supply frequency None of these supply voltage rotor resistance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is not suitable for frequent starting and stopping? Capacitor split phase motor All of these Resistance split phase motor Capacitor run motor Capacitor split phase motor All of these Resistance split phase motor Capacitor run motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motors, there is large decrease in maximum power factor when the dispersion coefficient is ________________. increased. remains same. kept constant to certain value. decreased. increased. remains same. kept constant to certain value. decreased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The counter (or back) emf in a dc machine is 1. the same as generated emf in a dc motor 2. proportional to field flux and armature speed 3. not the same as generated emf in a dc motor 4.inversely proportional to field flux 5. proportional to number of armature conductors 6. constant from no load to full load From these, the correct answer is 2, 4, 5, 6 3, 4, 5 1, 2, 5 2, 3, 6 2, 4, 5, 6 3, 4, 5 1, 2, 5 2, 3, 6 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Alternator operates on the principle of self induction. self or mutual induction. electromagnetic induction. mutual induction. self induction. self or mutual induction. electromagnetic induction. mutual induction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Torque developed in the rotor is inversely proportional to slip not dependent on the slip either of these directly proportional to slip inversely proportional to slip not dependent on the slip either of these directly proportional to slip ANSWER DOWNLOAD EXAMIANS APP
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