Electrical Machines A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. The rating of auto transformer is 500 VA 110 VA 100 VA 550 VA 500 VA 110 VA 100 VA 550 VA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of the dc motor is generally of the range 0.5 ohm. 100 ohm. 50 ohm. 0.1 ohm. 0.5 ohm. 100 ohm. 50 ohm. 0.1 ohm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If B is flux density, l the length of the conductor and v the velocity of the conductor, then emf is given by Blv. Blv2. Bl2v. Bl2v2. Blv. Blv2. Bl2v. Bl2v2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines During hunting of a synchronous motor harmonic are developed in the armature circuit. negative phase sequence currents are generated. field excitation increases. damper bar develops torque. harmonic are developed in the armature circuit. negative phase sequence currents are generated. field excitation increases. damper bar develops torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum starting torque is obtained, rotor power is 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 1, 4,5 1 , 3, 5 2, 3, 5 2, 4, 5 1, 4,5 1 , 3, 5 2, 3, 5 2, 4, 5 ANSWER DOWNLOAD EXAMIANS APP
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