Electrical Machines When flux density is constant in a transformer, hysteresis loss varies as f V² V f² f V² V f² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The interpoles in dc machines have a tapering shape in order to reduce the overall weight increase the acceleration of commutation reduce the saturation in the interpole economise on the material required for interpoles and their windings reduce the overall weight increase the acceleration of commutation reduce the saturation in the interpole economise on the material required for interpoles and their windings 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. None of above. back emf is equal to applied voltage. Back emf is equal. Back emf is equal to half of applied voltage. None of above. back emf is equal to applied voltage. Back emf is equal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as T ∝ P. T2 ∝ P3. T ∝ √P. T is independent of P. T ∝ P. T2 ∝ P3. T ∝ √P. T is independent of P. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If Kh is hysteresis constant, f is supply frequency, Bm maximum flux density in core of transformer, the expression of hysteresis loss in transformer, is given by KhfBm3. KhfBm. Khf2Bm1.6. KhfBm1.6. KhfBm3. KhfBm. Khf2Bm1.6. KhfBm1.6. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines internal characteristics are plotted between Eg vs load current Vt vs load current Eg vs Ia Vt vs Ia Eg vs load current Vt vs load current Eg vs Ia Vt vs Ia ANSWER DOWNLOAD EXAMIANS APP
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