Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to f2 V2 f V f2 V2 f V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC machine having P no of pole pairs Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for lap-winding ? PZL/ 4Sa PZL/4S PZL/4SP² PZL/4Sa² PZL/ 4Sa PZL/4S PZL/4SP² PZL/4Sa² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer core is laminated to reduce copper loss. eddy current loss. hysteresis loss. both 1 and 2. copper loss. eddy current loss. hysteresis loss. both 1 and 2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor has which of the following characteristics? Has a poor torque. Has a almost constant speed. Has its field winding consinting of thick wire and less no of turns. Can be started easily without load. Has a poor torque. Has a almost constant speed. Has its field winding consinting of thick wire and less no of turns. Can be started easily without load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A self-excited shunt generator fails to build up, because 1. the field circuit is open 2. The armature circuit is open 3. the residual magnetism is absent 4. The direction of rotation is wrong From these, the correct answer is 1, 2, 3 and 4 3 only 1, 2 and 3 1, 3 1, 2, 3 and 4 3 only 1, 2 and 3 1, 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The basic function of a transformer is to change the power factor the level of the voltage the frequency the power level the power factor the level of the voltage the frequency the power level ANSWER DOWNLOAD EXAMIANS APP
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