Electrical Machines The noise resulting from vibrations of lamination set by magnetic forces, is termed as hum. zoom. boo. magnetostriction. hum. zoom. boo. magnetostriction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Autotransformer makes effective saving on copper and copper losses, when its transformation ratio is equal to approx to one. very low less than one. greater than one. approx to one. very low less than one. greater than one. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Counter emf of a DC motor regulates its armature voltage. aids applied voltage. helps in energy conversion. exceeds supply voltage regulates its armature voltage. aids applied voltage. helps in energy conversion. exceeds supply voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC motor is laminated to reduce the eddy current loss. to reduce the mass. to reduce the hysteresis loss. to reduce the inductor. to reduce the eddy current loss. to reduce the mass. to reduce the hysteresis loss. to reduce the inductor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Width of a carbon brush should be equal to the width more than 3 commutator segment. less than the width of commutator segment. the width of the 1 to 2 commutator segment. the width of the 2 to 3 commutator segment. the width more than 3 commutator segment. less than the width of commutator segment. the width of the 1 to 2 commutator segment. the width of the 2 to 3 commutator segment. ANSWER DOWNLOAD EXAMIANS APP
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