Electrical Machines As compared to DOL starting, a cage induction motor with star-delta starting shall have reduced starting current. more starting torque. smoother acceleration. more starting time. reduced starting current. more starting torque. smoother acceleration. more starting time. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are effects of armature reaction? increases the design cost increase the iron loss All of these increase the maintenance and repair increases the design cost increase the iron loss All of these increase the maintenance and repair ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two dc machines A and B, using the same conductor material, have armature circuit resistances of 0.4 Ω and 1.2 Ω respectively. Of the two machines, A is bigger than B for the same voltage rating B is bigger than A for the same current rating both are of the same size for the same current rating A is bigger than B for the same current rating A is bigger than B for the same voltage rating B is bigger than A for the same current rating both are of the same size for the same current rating A is bigger than B for the same current rating ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine, the demagnetizing effect of armature reaction is due to component of armature mmf along field axis magnetic saturation in half of the field pole non-sinusoidal nature of armature mmf uneven air-gap length component of armature mmf along field axis magnetic saturation in half of the field pole non-sinusoidal nature of armature mmf uneven air-gap length ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the number of poles required, when the frequency is 50Hz and speed of the motor is 500 rpm? 12 5 24 10 12 5 24 10 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor when started on no load does not accelerate up to full speed but runs at 1/7th of the rated speed. The motor is said to be crawling. cogging. plugging. locking. crawling. cogging. plugging. locking. ANSWER DOWNLOAD EXAMIANS APP
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