Electrical Machines The back emf produced in a dc motor depends on P. Z. none of these. P and Z. P. Z. none of these. P and Z. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An inverted V curve of synchronous motor shows variation of power factor and DC excitation at constant load. supply voltage and excitation current at constant load. supply voltage and field current at constant excitation. power factor and supply voltage during hunting. power factor and DC excitation at constant load. supply voltage and excitation current at constant load. supply voltage and field current at constant excitation. power factor and supply voltage during hunting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is not a necessary condition to be satisfied for synchronising an incoming alternator to an already operating alternator? same frequency same phase sequence same voltage magnitude same prime mover speed same frequency same phase sequence same voltage magnitude same prime mover speed 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 there was a break in the armature circuit field resistance was higher than critical resistance field winding was wrongly connected there was no residual magnetism in the field circuit there was a break in the armature circuit field resistance was higher than critical resistance field winding was wrongly connected there was no residual magnetism in the field circuit 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 Bl2v. Blv. Blv2. Bl2v2. Bl2v. Blv. Blv2. Bl2v2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Universal motors are used in cranes All of these food processing traction cranes All of these food processing traction ANSWER DOWNLOAD EXAMIANS APP
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