Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of ohmic losses. eddy current losses. hysteresis losses. mechanical losses. ohmic losses. eddy current losses. hysteresis losses. mechanical losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines During hunting of a synchronous motor negative phase sequence currents are generated. damper bar develops torque. field excitation increases. harmonic are developed in the armature circuit. negative phase sequence currents are generated. damper bar develops torque. field excitation increases. harmonic are developed in the armature circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard system, the lower limit of the speed imposed by Armature resistance. None of above. Residual magnetism of the generator. Field resistance. Armature resistance. None of above. Residual magnetism of the generator. Field resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting in a synchronous cannot be due to variable load. variable frequency. windage friction. variable supply voltage. variable load. variable frequency. windage friction. variable supply voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The type of DC generator used for arc welding purpose is a cumulatively compounded generator differentially compounded generator shunt generator series generator cumulatively compounded generator differentially compounded generator shunt generator series generator ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor is clockwise when it is supplied with 3 - Φ sinusoidal voltage having phase sequence A - B - C. For counterclockwise rotation of motor, the phase sequence of the supply should be C - A - B. A - C - B. B - C - A. B - C - A or C - A - B. C - A - B. A - C - B. B - C - A. B - C - A or C - A - B. ANSWER DOWNLOAD EXAMIANS APP
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