Electrical Machines A DC series motor is running with a divertor connected across its field winding. If the divertor resistance is reduced then the speed of the motor will remain unaltered. increase. decrease. become execessively high. remain unaltered. increase. decrease. become execessively high. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If field current is decreased in shunt dc motor, the speed of the motor decreases. increases. remains same. None of these decreases. increases. remains same. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A motor operates in stable region at which of the following slip? low slip region both 1 and 2 high slip region unity slip low slip region both 1 and 2 high slip region unity slip ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW? 50 Hz 45 HZ 48 Hz 48.5 Hz 50 Hz 45 HZ 48 Hz 48.5 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Reluctance and hysteresis motors are the types of which electrical motor? 1 - Φ synchronous motor. Stepper motor. DC motor. 3 - Φ induction motor. 1 - Φ synchronous motor. Stepper motor. DC motor. 3 - Φ induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The demagnetising component of armature reaction in a DC generator reduces inter poles flux density. 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. ANSWER DOWNLOAD EXAMIANS APP
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