Electrical Machines The armature of DC machine is made of silicon steel lamination to increase the permeability. reduce hysteresis loss only. reduce both eddy current and hysteresis loss. reduce eddy current loss only. increase the permeability. reduce hysteresis loss only. reduce both eddy current and hysteresis loss. reduce eddy current loss only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors are suitable for computer printer drive ? Shaded pole motor. Reluctance motor. Hysteresis motor. Stepper motor. Shaded pole motor. Reluctance motor. Hysteresis motor. Stepper motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound? 541.67V, 250 rpm. 2166.67V, 230 rpm. 2166.67V, 270 rpm. 541.67V, 200 rpm. 541.67V, 250 rpm. 2166.67V, 230 rpm. 2166.67V, 270 rpm. 541.67V, 200 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5 Ω and back emf of 200 V is 40 A. 44 A. 440 A. 400 A. 40 A. 44 A. 440 A. 400 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The core flux in transformer depends mainly on supply voltage, frequency and load supply voltage and load supply voltage supply voltage and frequency supply voltage, frequency and load supply voltage and load supply voltage supply voltage and frequency ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a 3 - Φ wound induction motor is provided with heavy copper or aluminium bars placed in rotor slots. heavy short-circuited end rings. single phase winding. three phase winding. heavy copper or aluminium bars placed in rotor slots. heavy short-circuited end rings. single phase winding. three phase winding. ANSWER DOWNLOAD EXAMIANS APP
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