Electrical Machines The armature mmf of a DC machine has 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. trapezoidal space distribution and is stationary in space. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, the frequency of a voltage at the secondary is less than primary. greater than the primary. any of the above. equal to primary. less than primary. greater than the primary. any of the above. equal to primary. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If Pi and Pc represent core and full load copper loss respectively, the maximum KVA delivered to load corresponding to maximum efficiency is equal to rated KVA is √(Pi/Pc) (Pi/Pc)2 Pc/Pi Pi/Pc √(Pi/Pc) (Pi/Pc)2 Pc/Pi Pi/Pc ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The effect of ------------------ on main field flux is armature reaction? armature current armature mmf All of these armature flux armature current armature mmf All of these armature flux ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is 115 V. 460 V. 230 V. 200 V. 115 V. 460 V. 230 V. 200 V. 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 KhfBm. Khf2Bm1.6. KhfBm1.6. KhfBm3. KhfBm. Khf2Bm1.6. KhfBm1.6. KhfBm3. ANSWER DOWNLOAD EXAMIANS APP
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