Electrical Machines If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is 3Fmax. Fmax. (3/2)Fmax. (1/2)Fmax. 3Fmax. Fmax. (3/2)Fmax. (1/2)Fmax. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron reduces the saturation magnetization. None of these increases the hysteresis loss. increases the electrical resistivity of iron. reduces the saturation magnetization. None of these increases the hysteresis loss. increases the electrical resistivity of iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In speed control of DC Series motor, speed lower than the rated speed can be obtained by Connecting an additional resistance in the armature circuit. Any of the above. Connecting an additional resistance in stator circuit. Connecting an additional resistance in the field circuit. Connecting an additional resistance in the armature circuit. Any of the above. Connecting an additional resistance in stator circuit. Connecting an additional resistance in the field circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC series motor the speed is ______________ proportional to the armature current. none of these. directly. has no relation. inversely. none of these. directly. has no relation. inversely. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In escalator which motor is used? 3 - φ IM. DC shunt motor. Universal motor. 1 - φ IM. 3 - φ IM. DC shunt motor. Universal motor. 1 - φ IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field winding of a DC series motor is usually provided with thick wire to provide large flux. as it carries large load current. in order to reduce eddy current to provide large flux. to reduce the insulation of materials. to provide large flux. as it carries large load current. in order to reduce eddy current to provide large flux. to reduce the insulation of materials. ANSWER DOWNLOAD EXAMIANS APP
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