Electrical Machines In a DC generator sparking between brushes and commutator surface may be due to under commutation. over commutation. any of the above. too rapid reversal of current. under commutation. over commutation. any of the above. too rapid reversal of current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing armature resistance. increasing terminal voltage. increasing input power of the prime mover. increasing armature cooling. increasing armature resistance. increasing terminal voltage. increasing input power of the prime mover. increasing armature cooling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when there is no load on the generator. the generator runs on full load. the generator runs on designed speed. the generator runs on overload. there is no load on the generator. the generator runs on full load. the generator runs on designed speed. the generator runs on overload. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the residual magnetism is of the order of 2.5 %. 20 %. 10 %. 15 %. 2.5 %. 20 %. 10 %. 15 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, the angle between the stator and rotor fields is 0o. dependent upon the load. 180o. 90o. 0o. dependent upon the load. 180o. 90o. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine the armature mmf is stationary with respect to field poles. rotating with respect to field poles as well as armature. rotating with respect to field poles. stationary with respect to armature. stationary with respect to field poles. rotating with respect to field poles as well as armature. rotating with respect to field poles. stationary with respect to armature. ANSWER DOWNLOAD EXAMIANS APP
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