Electrical Machines If a shunt generator delivers 100 A at 200 V, and the resistances of the shunt field and armature are 100 ohms and 0.01 ohms respectively, the generator emf will be no resistance is connected. any one of the connection. parallel. series. no resistance is connected. any one of the connection. parallel. series. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will get heated and damaged. not start at all. rotate in the same direction as before maintenance. rotate in direction opposite to that before maintenance. get heated and damaged. not start at all. rotate in the same direction as before maintenance. rotate in direction opposite to that before maintenance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronising power of a synchronous motor varies directly as synchronous reactances Xs All of these directly as Xs2 inversely as 1/Xs directly as synchronous reactances Xs All of these directly as Xs2 inversely as 1/Xs ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature flux is.............with respect to main field flux or main field poles? rotates same direction rotates opposite direction None of these stationary rotates same direction rotates opposite direction None of these stationary ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous motor will deliver maximum power when load angle is 45°. input power factor is unity. load angle is 0°. load angle is equal to internal angle θ. load angle is 45°. input power factor is unity. load angle is 0°. load angle is equal to internal angle θ. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine, 1. physically, the brush axis is along the direct axis 2. physically, the brush axis is along the interpolar axis 3. schematically, the brush axis is along the direct axis 4. schematically, the brush axis is along the quadrature axis 5. armaturemmf is directed along the brush axis From these, the correct statements are 2, 3, 5 1 , 3, 5 2, 4, 5 1, 4,5 2, 3, 5 1 , 3, 5 2, 4, 5 1, 4,5 ANSWER DOWNLOAD EXAMIANS APP
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