DC Motors The mechanical power developed by a shunt motor will be maximum when the ratio of back emf to applied voltage is 2.0 1.0 4.0 0.5 2.0 1.0 4.0 0.5 ANSWER DOWNLOAD EXAMIANS APP
DC Motors The starting resistance of a DC motor is generally Infinitely large 1000 Ω Around 500 Ω Low Infinitely large 1000 Ω Around 500 Ω Low ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following loss in a D.C. generator varies significantly with the load current? Field copper loss Armature copper loss Windage loss None of these Field copper loss Armature copper loss Windage loss None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors The torque developed by a dc motor is directly proportional to Flux per pole × armature current Armature resistance × applied voltage Armature resistance × armature current None of the listed here Flux per pole × armature current Armature resistance × applied voltage Armature resistance × armature current None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors In which of the following tests only one motor is required? Brake test Hopkinson's test Swinburne's test Field's test Brake test Hopkinson's test Swinburne's test Field's test ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Too much brush tension Open armature coil Worn bearings Bent shaft Too much brush tension Open armature coil Worn bearings Bent shaft ANSWER DOWNLOAD EXAMIANS APP
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