Electrical Machines In a 3 - Φ IM in order to eliminate cogging the number of stator slots must be an integral multiple of number of rotor slots. either (B) or (C). equal to number of rotor slots. unequal to number of rotor slots and skewed in shape. an integral multiple of number of rotor slots. either (B) or (C). equal to number of rotor slots. unequal to number of rotor slots and skewed in shape. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 1-phase induction motor, if the forward torque slip is S, what is the backward torque slip? 2-S S 1-S 1/S 2-S S 1-S 1/S ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC machine is made of silicon steel lamination to reduce both eddy current and hysteresis loss. reduce eddy current loss only. increase the permeability. reduce hysteresis loss only. reduce both eddy current and hysteresis loss. reduce eddy current loss only. increase the permeability. reduce hysteresis loss only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Winding conductors of an electrical power transformer are mainly insulated by rubber insulation. cotton insulation. paper insulation. wooden insulation. rubber insulation. cotton insulation. paper insulation. wooden insulation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC shunt motor if load is increased, the speed reduce slightly. remains constant. increase proportional. increased slightly. reduce slightly. remains constant. increase proportional. increased slightly. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor can be reversed by disconnecting any one phase. transposing any two leads from supply. transposing any two leads from slip rings. transposing all the three leads from the supply. disconnecting any one phase. transposing any two leads from supply. transposing any two leads from slip rings. transposing all the three leads from the supply. ANSWER DOWNLOAD EXAMIANS APP
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