Electrical Machines For small value armature current Ia the torque developed by a DC series motor is proportional to 1/Ia. √Ia. Ia2. Ia. 1/Ia. √Ia. Ia2. Ia. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V dc series generator is driven at its rated speed. The no-load voltage across its armature terminals would be 230 V 6 V somewhat more than 230 V somewhat less than 230 V 230 V 6 V somewhat more than 230 V somewhat less than 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator in DC generator is used for increase efficiency collecting of current reduce losses convert AC armature current in to DC increase efficiency collecting of current reduce losses convert AC armature current in to DC ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements about commutating poles which are fitted on most large dc Shunt motors: 1. The commutating poles are placed in the geometric neutral plane and their number is usually Equal to the number of main poles 2. The winding on the commutating poles is connected in series with the shunt-field winding on the main poles 3. The polarity of the commutating pole must be that of the next pole further ahead 4. The commutating poles neutralize the reactance voltage produced in the coil undergoing Commutation. Of these statements, 2, 3 and 4 are correct 1, 2 and 3 are correct 1, 2 and 4 are correct 1 and 4 are correct 2, 3 and 4 are correct 1, 2 and 3 are correct 1, 2 and 4 are correct 1 and 4 are correct ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine 72 number of coils are used. Find the number of commutator segments required? 36 74 72 37 36 74 72 37 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 20KVA auto transformer, turn ratio is 0.8. Find the power transferred conductively? 20KVA 0KVA 4KVA 16KVA 20KVA 0KVA 4KVA 16KVA ANSWER DOWNLOAD EXAMIANS APP
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