DC Generators

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

A _____ is a machine that converts mechanical energy into electrical energy by using the principle of Faraday’s law of electromagnetic induction and Lenz’s law.

Back (Answer)

generator

Front (Question)

T or F. When a conductor is moved within a magnetic field or vice versa, it cuts across magnetic lines of flux and thus, current is generated in the conductor.

Back (Answer)

FALSE. VOLTAGE

Front (Question)

The amount of voltage generated (Eg) depends on:

Back (Answer)

• magnetic flux density (B) • angle at which the conductor cuts the magnetic field (θ) • length of the conductor within the magnetic field (L) • speed at which the conductor is moved (v) e = BLvsinθ

Front (Question)

Related to the effective area cutting the flux

Back (Answer)

angle, length

Front (Question)

Related to the amount of flux, Φ

Back (Answer)

flux density, angle, length

Front (Question)

T or F. The stronger the field or the more flux lines are cut for a given period of time, the larger the induced EMF.

Back (Answer)

TRUE

Front (Question)

The polarity of the generated voltage depends on the direction of the magnetic flux and the direction of movement of the conductor (Lenz’s law). To determine the direction of the current in a given situation, _______ for generators is used.

Back (Answer)

Fleming’s Right Hand Rule

Front (Question)

Fleming’s Right Hand Rule thumb - ______ forefinger - _______ middle finger - ______

Back (Answer)

motion field EMF & current

Front (Question)

An ______ consists of a loop of wire placed so that it can be rotated in a stationary magnetic field. This will produce an induced emf in the loop.

Back (Answer)

elementary generator

#10

Front (Question)

provide the magnetic field

Back (Answer)

pole pieces

#11

Front (Question)

usually made of carbon, with wires attached to them, ride against the rings

Back (Answer)

brushes

#12

Front (Question)

loop of wire that rotates thru the field

Back (Answer)

armature

#13

Front (Question)

the conductor ends of the armature loop are connected to rings called ____. (AC Generator)

Back (Answer)

slip rings

#14

Front (Question)

T or F. Number of poles of any generator is not always an even number.

Back (Answer)

False always

#15

Front (Question)

S or R pole pieces

Back (Answer)

stator

#16

Front (Question)

S or R armature

Back (Answer)

rotor

#17

Front (Question)

S or R brushes

Back (Answer)

stator

#18

Front (Question)

S or R slip rings

Back (Answer)

rotor

#19

Front (Question)

S or R pole pieces (High AC generators)

Back (Answer)

rotor

#20

Front (Question)

S or R armature (High AC generators)

Back (Answer)

stator

#21

Front (Question)

(AC Generator) At 0° position, armature loop is ______ to the magnetic field

Back (Answer)

perpendicular

#22

Front (Question)

When motion is parallel to the field

Back (Answer)

• no flux lines cut • no emf produced (0V)

#23

Front (Question)

another term for Neutral Plane

Back (Answer)

Magnetic Neutral Axis (MNA)

#24

Front (Question)

(AC Generator) At 90° position, ______ has been cut

Back (Answer)

maximum flux