Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to f2 f V2 V f2 f V2 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer has specifications as 250 KVA, 11000 V/415 V, 50 Hz. What are the values of primary and secondary currents? primary = 301 A, secondary = 22.7 A primary = 11.4 A, secondary = 301 A primary = 22.7 A, secondary = 602.4 A primary = 602 A, secondary = 22.7 A primary = 301 A, secondary = 22.7 A primary = 11.4 A, secondary = 301 A primary = 22.7 A, secondary = 602.4 A primary = 602 A, secondary = 22.7 A ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the effect of armature reaction ? Armature flux weakens the main field flux. None of the options. Both option B and C. Armature flux distorts the main field flux. Armature flux weakens the main field flux. None of the options. Both option B and C. Armature flux distorts the main field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If input of a transformer is square wave the output will be sine wave. square wave. pulsed wave. triangular wave. sine wave. square wave. pulsed wave. triangular wave. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them None of these just behind the magnetic neutral axis. in magnetic neutral axis. just ahead of magnetic neutral axis. None of these just behind the magnetic neutral axis. in magnetic neutral axis. just ahead of magnetic neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If an additional resistance is connected in series with a DC series motor operating at rated speed, the speed of the motor will Remain unaltered. Oscillate around the normal speed. Increase. Reduce. Remain unaltered. Oscillate around the normal speed. Increase. Reduce. ANSWER DOWNLOAD EXAMIANS APP
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