Electrical Machines The demagnetising component of armature reaction in a DC generator reduces inter poles flux density. results in sparking trouble. increases armature speed. reduces generator emf. reduces inter poles flux density. results in sparking trouble. increases armature speed. reduces generator emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The self induced emf in the coil undergoing commutation is called the None of these dynamically induced voltage. statically induced voltage. reactance voltage. None of these dynamically induced voltage. statically induced voltage. reactance voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Air core transformer as compared to iron core transformer, has less magnetic core loss. no magnetic core loss. more copper loss. more magnetic core loss. less magnetic core loss. no magnetic core loss. more copper loss. more magnetic core loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H? 2 V 1 V 4 V 0 V 2 V 1 V 4 V 0 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC compound motor can be reversed by interchanging armature or field connections. shunt field connections. armature connections. series field connections. armature or field connections. shunt field connections. armature connections. series field connections. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Total core loss is also called as -------------? Hysteresis loss Eddy current loss Magnetic loss Copper loss Hysteresis loss Eddy current loss Magnetic loss Copper loss ANSWER DOWNLOAD EXAMIANS APP
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