DC Motors By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor? Stator Frame Shaft Commutator Stator Frame Shaft Commutator ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? C. shunt motor Induction motor Reluctance motor C. series motor C. shunt motor Induction motor Reluctance motor C. series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor if the back emf is absent Motor will run at very high speed Motor will run at very slow speed Motor will burn Motor will not run at all Motor will run at very high speed Motor will run at very slow speed Motor will burn Motor will not run at all ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. machines the residual magnetism is of the order of 50 to 75 percent 2 to 3 percent 20 to 25 percent 10 to 15 percent 50 to 75 percent 2 to 3 percent 20 to 25 percent 10 to 15 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 50% of the previous value 10% of the previous value 25% of the previous value 100% of the previous value 50% of the previous value 10% of the previous value 25% of the previous value 100% of the previous value ANSWER DOWNLOAD EXAMIANS APP
DC Motors The rheostatic speed control method is very Suitable for getting speeds above the normal Unsuitable for rapidly changing loads Efficient Economical Suitable for getting speeds above the normal Unsuitable for rapidly changing loads Efficient Economical ANSWER DOWNLOAD EXAMIANS APP
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