Electrical Machines Eb/V ratio of a DC motor is an indication of Speed regulation. Effiency. Running Torque. Starting torque. Speed regulation. Effiency. Running Torque. Starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator if field winding attains the critical resistance the voltage generated will be zero. machine will generate maximum power. field winding will burn. machine will generate maximum voltage. the voltage generated will be zero. machine will generate maximum power. field winding will burn. machine will generate maximum voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The mechanical power is developed by a DC motor is maximum when back emf is equal to twice of applied voltage. back emf is equal to applied voltage. none of above. back emf is equal to half of applied voltage. back emf is equal to twice of applied voltage. back emf is equal to applied voltage. none of above. back emf is equal to half of applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase supply frequency supply voltage rotor resistance None of these supply frequency supply voltage rotor resistance None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of 4 / 5. 2 / 3. 5 / 6. 6 / 7. 4 / 5. 2 / 3. 5 / 6. 6 / 7. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 1000 rpm 975 rpm 940 rpm 950 rpm 1000 rpm 975 rpm 940 rpm 950 rpm ANSWER DOWNLOAD EXAMIANS APP
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