DC GENERATORS

The armature of DC Generator is laminated to

• To reduce bulk

• To insulate the core

• To reduce hysterisis loss

• To reduce Eddy current Loss

The field coils of DC generator are usually made of

• Mica

• Copper

• Cast Iron

• Carbon

The demagnetizing component of armature reaction in a DC Generator

• 
  Reduces generator e.m.f.

• increases armature speed

• Reduces interpoles flux density

• Results in sparking trouble

Equalizer rings are required in case of armature is

• Wave wound

• Lap Wound

• Delta Wound

• Duplex wound

A dc generator works on the principle of

• Lenz's law

• Ohm's law

• Faraday's law of electromagnetic induction

• None of the above

In DC generators Lap winding is used for

• High voltage, high current

• Low voltage, high current

• High voltage, low current

• Low voltage, low current

What is the purpose of commutator in a DC generator?

• To reduce bulk

• To reverse the direction of current in the armature coil

• To insulate the core

• To reduce Eddy current Loss

What is the function of interpoles in a DC generator?

• To reduce generator e.m.f.

• To increase armature speed

• To neutralize the effect of armature reaction

• To reduce sparking trouble

What is the purpose of using laminated core in the armature of a DC generator?

• To reduce bulk

• To insulate the core

• To reduce hysterisis loss

• To reduce Eddy current Loss

What is the purpose of using commutator in a DC motor?

• To reduce bulk

• To reverse the direction of current in the armature coil

• To insulate the core

• To reduce Eddy current Loss