Electrical Machines In a transformer zero voltage regulation is achieved at a load power factor which is lagging unity leading zero lagging unity leading zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is 60 Hz. 50 Hz. 25 Hz. 16.67 Hz. 60 Hz. 50 Hz. 25 Hz. 16.67 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The ___________________ generator has the poorest voltage regulation. under-compounded. over compounded. shunt. differential compounded. under-compounded. over compounded. shunt. differential compounded. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The demagnetising component of armature reaction in a DC generator reduces inter poles flux density. increases armature speed. results in sparking trouble. reduces generator emf. reduces inter poles flux density. increases armature speed. results in sparking trouble. reduces generator emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC shunt motor if load is increased, the speed remains constant. increase proportional. reduce slightly. increased slightly. remains constant. increase proportional. reduce slightly. increased slightly. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing the field of DC generator means increasing flux density by adding extra turns of winding. neutralising residual magnetism. making the magnetic losses forces parallel. creating residual magnetism by a DC source. increasing flux density by adding extra turns of winding. neutralising residual magnetism. making the magnetic losses forces parallel. creating residual magnetism by a DC source. ANSWER DOWNLOAD EXAMIANS APP
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