DC Generator

Two of the following are the general types of DC generators. (Check two)

• Asynchronous

• Self Excited

• Separately Excited

• Synchronous

• Differential Compound

The presence of magnetic lines of force is not necessary in the operation of a generator.

• TRUE

• FALSE

How does a direct current is supplied by a DC generator?

• by the principle of electromagnetic induction

• by the process of commutation

• by inserting diode rectifiers in series with the armature windings

• by inserting capacitor in parallel with the generator terminals

How does electromagnetic induction works? (choose two)

• by moving coils around a magnet

• by moving the magnet around the coils

• by moving both the magnet and the coils around each other

• by placing the magnet and the coils beside each other

It is used to change the AC voltage induced in the armature windings to DC voltage at the generator output terminals.

• armature

• rotor

• poles

• commutator

Commutating poles are also called ____________.

• magnetic poles

• field poles

• interpoles

• earth poles

The standard direction of rotation for DC generators is ________ when looking at the commutator end.

• clockwise

• counter clockwise

• in the direction of the magnetic field

• in the direction of the magnetic flux

It is the component of the generator that has the voltage (EMF) induced into it.

• commutator

• armature

• prime mover

• rotor

It facilitates the collection of current from the armature conductor.

• commutator

• field poles

• brushes

• interpoles

They collect current from the commutator.

• armature

• interpoles

• rotor

• brushes