Electrical Machines The armature MMF waveform of a DC machine is triangular. pulsating. sinusoidal. rectangular. triangular. pulsating. sinusoidal. rectangular. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two identical loss less series motors connected in series across a dc supply voltage, runs at speed of N1 and N2, then ratio of their output power is N1 : N2. N12 : N22. none. 1 : 1. N1 : N2. N12 : N22. none. 1 : 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slot edges in a DC machine are made of Fibre. Cast iron. Mild steel. Silicon steel. Fibre. Cast iron. Mild steel. Silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when driven without any excitation, showed an open circuit voltage of 12 V. When the field winding was excited, the voltage dropped to zero. It happened because field winding was wrongly connected there was a break in the armature circuit there was no residual magnetism in the field circuit field resistance was higher than critical resistance field winding was wrongly connected there was a break in the armature circuit there was no residual magnetism in the field circuit field resistance was higher than critical resistance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When an electric train is moving down a hill, the DC motor will operate as DC series generator. DC shunt generator. DC shunt motor. DC series motor. DC series generator. DC shunt generator. DC shunt motor. DC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the shunt resistance component equivalent circuit obtained by no load test of an induction motor representative of ? both 1 and 2 core loss only Copper loss windage and friction loss both 1 and 2 core loss only Copper loss windage and friction loss ANSWER DOWNLOAD EXAMIANS APP
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