DC Mach FUndamentals

Below are three important factors needed to generate voltage in a generator, except:

• capacitor

• magnetic field

• conductor

• relative motion between conductor and m

Magnetic field can be produced either permanent magnet or _________

• magnetite

• electromagnet

• lodestone

• none of the choices

The windings in an electromagnet that produces magnetic field in DC machine are called _______

• Field windings

• armature windings

• series windings

• shunt windings

A single winding conductor moves through the magnetic field as it rotated by a mechanical energy in order to produce voltage

• field windings

• armature windings

• series windings

• shunt windings

__________connect the external circuit to the generator winding through the split ring, sliding connection.

• commutator

• battery

• carbon brushes

• terminals

The _________acts as mechanical rectifier, converting AC generated voltage into DC voltage.

• commutator

• carbon brushes

• armature

• core

The process of converting AC generated voltage or changes the polarity of the armature field windings, reversing current flow through the armature

• rectification

• commutation

• transformation

• adaptation

As more sets of windings are wound into the armature, the number of sliding connections around a commutator increases proportionally. These are called _______

• commutator segments

• commutator brushes

• terminal connections

• armature segments

The conductors are wound in such a way that each magnetically induced voltage of each turn is added to the next, obtaining a higher output voltage

• wave

• lap

• delta

• wye

Armatures wound with windings in parallel to produce higher current are called _________

• wave

• lap

• delta

• wye