Electrical Machines The speed of a DC series motor is Proportional to the armature current. Proportional to field current. Proportional to the square of the armature current. Inversely proportional to the armature current. Proportional to the armature current. Proportional to field current. Proportional to the square of the armature current. Inversely proportional to the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC generator will be in a position to build up without any residual magnetism in the field? Series. Separately excited. Compound. Shunt. Series. Separately excited. Compound. Shunt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lamination of transformer core is made of cast steel. wrought iron. silicon steel. cast iron. cast steel. wrought iron. silicon steel. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuiting is caused in the armature winding due to any of above. failure of insulation between two turns of coil. grounding of two or more turns of the same coil. failure of insulation between two commutator bars. any of above. failure of insulation between two turns of coil. grounding of two or more turns of the same coil. failure of insulation between two commutator bars. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The factors that are responsible for decrease in terminal voltage of a shunt generator are armature resistance, inter poles, armature. armature resistance, effect of armature reaction. armature resistance, effect of armature reaction. reduction in field current, effect of armature reaction, armature. armature resistance, inter poles, armature. armature resistance, effect of armature reaction. armature resistance, effect of armature reaction. reduction in field current, effect of armature reaction, armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For very sensitive and wide speed control, the preferable control method is Multiple voltage control. Field control. Ward-Leonard control. Armature control. Multiple voltage control. Field control. Ward-Leonard control. Armature control. ANSWER DOWNLOAD EXAMIANS APP
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