Electrical Machines The power factor of an induction motor operating at no load will have a value around unity 0.2 lead 0.2 lag 0.9 lag unity 0.2 lead 0.2 lag 0.9 lag ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For which of the following loads, armature reaction is magnetizing in nature? pure inductive load pure capacitive load pure resistive load None of these pure inductive load pure capacitive load pure resistive load None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The demagnetising component of armature reaction in a DC generator reduces generator emf. increases armature speed. reduces inter poles flux density. results in sparking trouble. reduces generator emf. increases armature speed. reduces inter poles flux density. results in sparking trouble. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 8-pole, DC generator has a simplex wave-wound armature containing 32 coils of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm. The induced armature voltage is 192 V 384 V 96 V 768 V 192 V 384 V 96 V 768 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a step down transformer which one of the following statements is true? Number of secondary turns is more than that of primary. Secondary current is less than primary current. Secondary power is less than primary power. Number of secondary turns is less than primary turns. Number of secondary turns is more than that of primary. Secondary current is less than primary current. Secondary power is less than primary power. Number of secondary turns is less than primary turns. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following winding is connected in series with armature winding of DC machine? Compensating winding. Commutating pole winding. Both Compensating and Commutating pole winding. Auxiliary winding. Compensating winding. Commutating pole winding. Both Compensating and Commutating pole winding. Auxiliary winding. ANSWER DOWNLOAD EXAMIANS APP
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