Electrical Machines Copper brushes in DC machine are used where high voltage and low current. in both of above cases. where low voltage and high currents are involved. None of these where high voltage and low current. in both of above cases. where low voltage and high currents are involved. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine current and emf at the terminals are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are alternating. current and emf in armature are unidirectional current and emf at the terminals are alternating. emf in armature conductors and at the terminals is alternating. current and emf in armature are alternating. current and emf in armature are unidirectional ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, brushes are always placed along armature axis. load axis. magnetic neutral axis. geometrical neutral axis. armature axis. load axis. magnetic neutral axis. geometrical neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To have sparkless commutation, the armature reaction effect in a DC machine is neutralized by fixing the brush axis inline with the pole axis. shifting the brush axis from GNA to MNA. increasing field excitation. compensating winding and commutating poles. fixing the brush axis inline with the pole axis. shifting the brush axis from GNA to MNA. increasing field excitation. compensating winding and commutating poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Tap changer is generally provided in earthing transformer. current transformer. voltage transformer. power transformer. earthing transformer. current transformer. voltage transformer. power transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve low starting torque. reduced size. high efficiency. quick acceleration. low starting torque. reduced size. high efficiency. quick acceleration. ANSWER DOWNLOAD EXAMIANS APP
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