Electrical Machines In a transformer maximum flux density is not constant, the eddy current loss varies as V² f² f V V² f² f V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : 1. interpole windings are connected in series with armature windings 2. polarity of interpoles must be the same as that of the main poles in advance 3. distortion of the main field under the pole shoes is not affected by the use of interpoles From above, the correct answer is 2 and 3 1 alone 1 and 3 1 and 2 2 and 3 1 alone 1 and 3 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine the armature mmf is stationary with respect to field poles. stationary with respect to armature. rotating with respect to field poles. rotating with respect to field poles as well as armature. stationary with respect to field poles. stationary with respect to armature. rotating with respect to field poles. rotating with respect to field poles as well as armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The leakage reactance of a 3-phase alternator is determined by performing open circuit and short circuit tests. zero power factor and slip tests. short circuit and slip tests. open circuit and zero power factor tests. open circuit and short circuit tests. zero power factor and slip tests. short circuit and slip tests. open circuit and zero power factor tests. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine, the armature windings are placed on the rotor because of necessity for generation of voltage. development of torque. commutation. electromechanical energy conversion. generation of voltage. development of torque. commutation. electromechanical energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating windings are used in DC generators mainly to reduce the eddy currents by providing local short circuit. to provide path for the circulation of cooling air. to neutralize the cross magnetizing effect of the armature reaction. None of these mainly to reduce the eddy currents by providing local short circuit. to provide path for the circulation of cooling air. to neutralize the cross magnetizing effect of the armature reaction. None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS