DC Motors The commutating winding is basically used in a dc machine None of the listed here To improve commutation To control the speed of machine To reduce armature reaction None of the listed here To improve commutation To control the speed of machine To reduce armature reaction ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc motor can be easily identified by Size of conductor Commutator Winding Yoke Size of conductor Commutator Winding Yoke ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? C. series motor C. shunt motor Induction motor Reluctance motor C. series motor C. shunt motor Induction motor Reluctance motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive sparking at brushes may be caused due to Worn bearings Dirt on the commutator Loose coupling Misaligment of machine Worn bearings Dirt on the commutator Loose coupling Misaligment of machine ANSWER DOWNLOAD EXAMIANS APP
DC Motors When the armature of a D.C. motor rotates, e.m.f. induced is None of these Self-induced e.m.f. Back e.m.f. Mutually induced e.m.f. None of these Self-induced e.m.f. Back e.m.f. Mutually induced e.m.f. ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be Anywhere between 75% and 90% Less than 50% Around 90% 1 Anywhere between 75% and 90% Less than 50% Around 90% 1 ANSWER DOWNLOAD EXAMIANS APP
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