Electrical Machines In a dc machine 72 number of coils are used. Find the number of commutator segments required? 72 36 37 74 72 36 37 74 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will remain unaltered increase by 100% reduced to half increase by 200% remain unaltered increase by 100% reduced to half increase by 200% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An unexcited single phase synchronous motor is universal motor. AC series motor. reluctance motor. repulsion motor. universal motor. AC series motor. reluctance motor. repulsion motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An ideal synchronous motor has no starting torque because relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. rotor is made up of salient poles. rotor winding is highly reactive. relative velocity between stator and rotor mmf’s is not zero. relative velocity between the stator and rotor mmf’s is zero. rotor is made up of salient poles. rotor winding is highly reactive. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power will be developed when back emf is equal to supply voltage. All of these half of the supply voltage. double the supply voltage. equal to supply voltage. All of these half of the supply voltage. double the supply voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shaded pole single phase induction motor can be used for food mixers personal computers as cooling fan tape recorders wet grinders food mixers personal computers as cooling fan tape recorders wet grinders ANSWER DOWNLOAD EXAMIANS APP
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