Electrical Machines In an induction motor, what is the ratio of rotor input to rotor copper loss? 1/(1-S) 1/S S 1-S 1/(1-S) 1/S S 1-S ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The magnetic field which initially induces emf in the armature in a self excited DC generator is because of permanent magnets. None of these armature reaction. residual magnetism. permanent magnets. None of these armature reaction. residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine 72 number of coils are used. Find the number of commutator segments required? 36 37 72 74 36 37 72 74 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines With the increase in speed of a DC motor back emf falls and line current increases. both back emf as well as line current increase. both back emf as well as line current fall. back emf increases but line current falls. back emf falls and line current increases. both back emf as well as line current increase. both back emf as well as line current fall. back emf increases but line current falls. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt generator builds up 230 V when driven in clockwise direction. In case it is driven in anti clockwise direction, other things remaining unchanged, then the voltage build up is some what less than 230 V not possible some what more than 230 V 230 V some what less than 230 V not possible some what more than 230 V 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformers operating in parallel will share the load depending upon their rating. percentage impedance. efficiency. leakage reactance. rating. percentage impedance. efficiency. leakage reactance. ANSWER DOWNLOAD EXAMIANS APP
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