Electrical Machines A transformer has maximum efficiency at 3/4 load. The ratio of iron loss and full load copper loss is 16/9. 3/4. 9/16. 4/3. 16/9. 3/4. 9/16. 4/3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the commutator pitch? The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the front end of the armature. Number of conductors spanned by one coil at the back end of the armature. Number of commutator segments between two successive coils. The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the front end of the armature. Number of conductors spanned by one coil at the back end of the armature. Number of commutator segments between two successive coils. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The brushes of a DC machine should be placed on the commutator in the inter polar axis. armature in the polar axis. commutator in the polar axis. armature midway between poles. commutator in the inter polar axis. armature in the polar axis. commutator in the polar axis. armature midway between poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase 6 pole 50 Hz induction motor is running at 5% slip.What is the speed of the motor? 900 rpm 850 rpm 950 rpm 1000 rpm 900 rpm 850 rpm 950 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase rotor resistance None of these supply frequency supply voltage rotor resistance None of these supply frequency supply voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lamination of transformer core is made of wrought iron. cast steel. cast iron. silicon steel. wrought iron. cast steel. cast iron. silicon steel. ANSWER DOWNLOAD EXAMIANS APP
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