Electrical Machines Hopkinss test in DC motor is conducted at ? No load. Low load. Full load. None of these. No load. Low load. Full load. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The compensating winding in a DC machine is located on pole shoes to avoid the sparking at the brushes. is located on commutating poles for improving commutation. is located on pole shoes for avoiding the flashover at the commutator. is located in armature slots for compensation of the armature reaction. is located on pole shoes to avoid the sparking at the brushes. is located on commutating poles for improving commutation. is located on pole shoes for avoiding the flashover at the commutator. is located in armature slots for compensation of the armature reaction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Breadth factor is defined as the ratio of None of these both 1 and 2. emf with distributed winding to emf with concentrated winding. emf with concentrated winding to emf with distributed winding. None of these both 1 and 2. emf with distributed winding to emf with concentrated winding. emf with concentrated winding to emf with distributed winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sparking at the the brushes, in a DC machines is due to presence of commutator. reactance voltage. armature reaction. high resistance of carbon brushes. presence of commutator. reactance voltage. armature reaction. high resistance of carbon brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine 6 pole wave winding is used. The number of parallel paths are? 6 2 1 4 6 2 1 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is 2, 3, 4 1, 2, 3 2, 3 ,5 2, 3, 4, 5 2, 3, 4 1, 2, 3 2, 3 ,5 2, 3, 4, 5 ANSWER DOWNLOAD EXAMIANS APP
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