Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be zero. equal to core loss. less than core loss. more than core loss. zero. equal to core loss. less than core loss. more than core loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The magnetic circuit of a dc shunt generator with negligible armature resistance and brush contact voltage drop remains unsaturated when it delivers full-load current at rated terminal voltage. The brushes are kept in the interpolar axis and speed is maintained constant. When the load is switched off, the terminal voltage would decrease increase remain the same become zero decrease increase remain the same become zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lamination of transformer core is made of cast iron. cast steel. silicon steel. wrought iron. cast iron. cast steel. silicon steel. wrought iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines 3rd harmonics are eliminated in induction motor by using V connection. star connection. zig - zag connection. delta connection. V connection. star connection. zig - zag connection. delta connection. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of conductor of a DC motor can be determined by Fleming's left hand rule. Lenz's law. Ampere law. Fleming's right hand rule. Fleming's left hand rule. Lenz's law. Ampere law. Fleming's right hand rule. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following methods of speed control is not affected through stator side? Change of rotor resistance. Change of supply frequency. Change of number of pole. Change of supply voltage. Change of rotor resistance. Change of supply frequency. Change of number of pole. Change of supply voltage. ANSWER DOWNLOAD EXAMIANS APP
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