Electrical Machines What will be the eddy current loss if the supply frequency of a transformer becomes double? Four times. Eight times. Remains same. Doubled. Four times. Eight times. Remains same. Doubled. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase None of these supply voltage supply frequency rotor resistance None of these supply voltage supply frequency rotor resistance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for parallel operation of alternators? Frequency should be same Both 1and 2 Speed of alternators should be same Terminal voltage is same Frequency should be same Both 1and 2 Speed of alternators should be same Terminal voltage is same ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be more than core loss. less than core loss. zero. equal to core loss. more than core loss. less than core loss. zero. equal to core loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine the armature mmf is rotating with respect to field poles. rotating with respect to field poles as well as armature. stationary with respect to armature. stationary with respect to field poles. rotating with respect to field poles. rotating with respect to field poles as well as armature. stationary with respect to armature. stationary with respect to field poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When two DC series motors are connected in parallel, the resultant speed is zero. less than normal speed. more than normal speed. normal speed. zero. less than normal speed. more than normal speed. normal speed. ANSWER DOWNLOAD EXAMIANS APP
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