Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will remains same. none of these. Decrease.d increase. remains same. none of these. Decrease.d increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Due to magnetic saturation, the flux per pole in a DC machine without brush shift increases in both the generators and the motors with load. decreases in generators and increases in motor with load. decreases in both generators and the motors with load. increases in generators but decreases in motor with load. increases in both the generators and the motors with load. decreases in generators and increases in motor with load. decreases in both generators and the motors with load. increases in generators but decreases in motor with load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Number of tappings for each equalizer ring is equal to number of commutator segments. number of parallel paths. number of poles. number of pole pairs. number of commutator segments. number of parallel paths. number of poles. number of pole pairs. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron increases the electrical resistivity of iron. None of these reduces the saturation magnetization. increases the hysteresis loss. increases the electrical resistivity of iron. None of these reduces the saturation magnetization. increases the hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound? 541.67V, 200 rpm. 2166.67V, 270 rpm. 541.67V, 250 rpm. 2166.67V, 230 rpm. 541.67V, 200 rpm. 2166.67V, 270 rpm. 541.67V, 250 rpm. 2166.67V, 230 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Stepper motor is used in computer printers food processing All of these traction computer printers food processing All of these traction ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS