Electrical Machines Which of the following induction motor has maximum speed? 4 pole. 6 pole. 2 pole. 8 pole. 4 pole. 6 pole. 2 pole. 8 pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The demagnetising component of armature reaction in a DC generator reduces generator emf. results in sparking trouble. increases armature speed. reduces inter poles flux density. reduces generator emf. results in sparking trouble. increases armature speed. reduces inter poles flux density. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The supply voltage to an induction motor is reduced by 10%. By what percentage, approximately, will the maximum torque decrease? 40% 19% 10% 5% 40% 19% 10% 5% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If an AC servomotor has one of its winding excited by AC, then voltage measured at the other winding with rotor running will be proportional to rotor speed. zero. constant independent of speed. proportional to square of rotor speed. proportional to rotor speed. zero. constant independent of speed. proportional to square of rotor speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward-Leonard control is basically a ___________ control method. Armature resistance control. Field diverter control. Field control. Armature voltage control. Armature resistance control. Field diverter control. Field control. Armature voltage control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop DC motor torque. induction motor torque. synchronous motor torque. induction generator torque. DC motor torque. induction motor torque. synchronous motor torque. induction generator torque. ANSWER DOWNLOAD EXAMIANS APP
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