Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 400 A. 44 A. 440 A. 40 A. 400 A. 44 A. 440 A. 40 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing armature resistance. increasing armature cooling. increasing input power of the prime mover. increasing terminal voltage. increasing armature resistance. increasing armature cooling. increasing input power of the prime mover. increasing terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following alternators contain large number of poles? Aame in both alternators. Turbo alternators. None of these Hydro alternators. Aame in both alternators. Turbo alternators. None of these Hydro alternators. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is critical, the power factor of the alternator is leading power factor. lagging power factor. None of these unity power factor. leading power factor. lagging power factor. None of these unity power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary? It will remain the same. It will becomes four times. It will be doubled. It will be halved. It will remain the same. It will becomes four times. It will be doubled. It will be halved. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Number of tappings for each equalizer ring is equal to number of pole pairs. number of commutator segments. number of poles. number of parallel paths. number of pole pairs. number of commutator segments. number of poles. number of parallel paths. ANSWER DOWNLOAD EXAMIANS APP
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