Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to high field resistance. residual flux. high speed. magnetic inertia. high field resistance. residual flux. high speed. magnetic inertia. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor is supplying a load at unity power factor. If the load on the motor is increased keeping its excitation and terminal voltage constant, the power factor None of these will remain the same will become leading will become lagging None of these will remain the same will become leading will become lagging ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a dc machine shunt resistance and armature resistance values are low and high high and low low and low high and high low and high high and low low and low high and high ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the mechanical power is developed by a DC motor maximum Back emf is equal to half of applied voltage. Back emf is equal. None of above. back emf is equal to applied voltage. Back emf is equal to half of applied voltage. Back emf is equal. None of above. back emf is equal to applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 400 / 200 V, Y - Y connected wound rotor induction motor has 0.06 Ω rotor resistance and 0.3 Ω standstill reactance per phase. To make the starting torque equal to maximum torque of the motor the additional resistance required 0.78 Ω. 0.66 Ω. 0.45 Ω. 0.24 Ω. 0.78 Ω. 0.66 Ω. 0.45 Ω. 0.24 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC Shunt Motor if the load current increases then field flux increases. remains constant. decreases. decreases increases. remains constant. decreases. decreases ANSWER DOWNLOAD EXAMIANS APP
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