Electrical Machines A 3 - Φ, 4 pole, 50 Hz induction motor 4 % slip, calculate frequency of the rotor emf? 3 Hz. 50 Hz. 10 Hz. 2 Hz. 3 Hz. 50 Hz. 10 Hz. 2 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of double squirrel cage winding on the rotor provides low noise. a large starting torque. higher efficiency. reduced starting torque. low noise. a large starting torque. higher efficiency. reduced starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at any of the above. lagging power factor. unity power factor. leading power factor. any of the above. lagging power factor. unity power factor. leading power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to residual flux. high field resistance. high speed. magnetic inertia. residual flux. high field resistance. high speed. magnetic inertia. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf of a DC machine has trapezoidal space distribution and is stationary in space. triangular space distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. trapezoidal space distribution and is stationary in space. triangular space distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - φ induction motor can also be referred to as a asynchronous motor. transformer. shunt motor. repulsion motor. asynchronous motor. transformer. shunt motor. repulsion motor. ANSWER DOWNLOAD EXAMIANS APP
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