Electrical Machines In case of a dc motor the ratio Eb / E is indicative of efficiency. ratio of starting to running current. ratio of starting to running torque. ratio of input to output voltage. efficiency. ratio of starting to running current. ratio of starting to running torque. ratio of input to output voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the air gap of IM is increased, ____________ will increase. air gap flux. speed. power factor. magnetizing current. air gap flux. speed. power factor. magnetizing current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC compound motor the field regulator is provided to control the armature flux. demagnetize the field partially. limit the armature current. control the field flux. control the armature flux. demagnetize the field partially. limit the armature current. control the field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has maximum efficiency at 3/4 load. The ratio of iron loss and full load copper loss is 16/9. 9/16. 4/3. 3/4. 16/9. 9/16. 4/3. 3/4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V. 230 V. 225 V. 222 V. 220 V. 230 V. 225 V. 222 V. 220 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve quick acceleration. low starting torque. reduced size. high efficiency. quick acceleration. low starting torque. reduced size. high efficiency. ANSWER DOWNLOAD EXAMIANS APP
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