DC Generators The coupling field between electrical and mechanical systems of a dc machine is ______ None of the listed here Both electrical and magnetic fields Magnetic field Electric field None of the listed here Both electrical and magnetic fields Magnetic field Electric field ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when The generator runs on full load There is no load on the generator The generator runs on designed speed The generator runs on overload The generator runs on full load There is no load on the generator The generator runs on designed speed The generator runs on overload ANSWER DOWNLOAD EXAMIANS APP
DC Generators The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except Commutation Armature reaction Field weakening due to armature reaction and armature Armature resistance drop Commutation Armature reaction Field weakening due to armature reaction and armature Armature resistance drop ANSWER DOWNLOAD EXAMIANS APP
DC Generators The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage Will always be 250 V May be greater or less than 250 V None of these Will be less than 250 V Will always be 250 V May be greater or less than 250 V None of these Will be less than 250 V ANSWER DOWNLOAD EXAMIANS APP
DC Generators The efficiency of a dc generator means its Mechanical efficiency Overall efficiency None of the listed here Electrical efficiency Mechanical efficiency Overall efficiency None of the listed here Electrical efficiency ANSWER DOWNLOAD EXAMIANS APP
DC Generators To avoid formation of grooves in the commutator of a D.C. machine The brushes of opposite polarity should track each other All of these The brushes of same polarity should track each other Brush position has no effect on the commutator grooving The brushes of opposite polarity should track each other All of these The brushes of same polarity should track each other Brush position has no effect on the commutator grooving ANSWER DOWNLOAD EXAMIANS APP
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