Electrical Machines Which of the following induction motor has maximum speed? 2 pole. 6 pole. 8 pole. 4 pole. 2 pole. 6 pole. 8 pole. 4 pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The following statements relate to compensating winding (CW) and interpole winding (IW) of a dc machine : 1. CW neutralizes the armature reaction under a pole pitch 2. IW is connected in series with armature circuit 3. IW produces mmf in the commutating zone only 4. CWmmf is directed along the brush axis 5. Mmf produced by IW is equal to armature mmf From these, the correct statements are 1, 2, 3, 4 and 5 1, 3, 4, 5 2, 3, 4 2, 3, 4, 5 1, 2, 3, 4 and 5 1, 3, 4, 5 2, 3, 4 2, 3, 4, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines, the interpoles are provided to counteract demagnetizing effect of armature mmf in commutating zone. to counteract the reactance voltage and the cross-magnetizi both (B) and (C). to make commutation spark less. to counteract demagnetizing effect of armature mmf in commutating zone. to counteract the reactance voltage and the cross-magnetizi both (B) and (C). to make commutation spark less. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In salient pole synchronous machine, if direct axis reactance and quadrature axis reactance is equal, then power developed due to reluctance is maximum zero infinite value any of the above maximum zero infinite value any of the above ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is 7%. 8.9%. 14%. 0%. 7%. 8.9%. 14%. 0%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which one of the following statement is correct ? In an induction motor if the air gap is increased then its power factor will reduce its speed will reduce its speed will increase its efficiency will improve its power factor will reduce its speed will reduce its speed will increase its efficiency will improve ANSWER DOWNLOAD EXAMIANS APP
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