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