Electrical Machines With the increase in speed of a DC motor both back emf as well as line current increase. back emf increases but line current falls. back emf falls and line current increases. both back emf as well as line current fall. both back emf as well as line current increase. back emf increases but line current falls. back emf falls and line current increases. both back emf as well as line current fall. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the speed of a dc motor increases with load torque, then it is a differentially compounded motor series motor comulatively compounded motor permanent magnet motor differentially compounded motor series motor comulatively compounded motor permanent magnet motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field circuit of a DC shunt motor is opened The motor will attain dangerously high speed. DC Shunt Motor The speed of motor will be reduced. The armature current will reduce. The motor will attain dangerously high speed. DC Shunt Motor The speed of motor will be reduced. The armature current will reduce. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the methods to reduce the armature reaction and its effects? compensating winding pole chamfering All of these pole stacking compensating winding pole chamfering All of these pole stacking ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines stepped cores are used in transformers in order to reduce reluctance of core. volume of iron. iron loss. volume of copper. reluctance of core. volume of iron. iron loss. volume of copper. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has resistance and reactance in per unit as 0.01 and 0.04 respectively. Its voltage regulation for 0.8 power factor lagging and leading will be 3.2% and -1.6% 4.8% and -3.2% 6% and -4% None of these 3.2% and -1.6% 4.8% and -3.2% 6% and -4% None of these ANSWER DOWNLOAD EXAMIANS APP
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