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Electrical Final > 103F > Flashcards

103F Flashcards

1
Q

Potential energy ready to do work is

A

EMF
Electromotive force

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2
Q

The 6 types of EMF are

A

Chemical
Heat
Pressure
Light
Magnet
Electrostatics

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3
Q

On a battery the positive side is called

A

Cathode

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4
Q

The negative side of the battery is called

A

Anode

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5
Q

Can you create different voltages with connecting various electrodes

A

Yes

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6
Q

When heating two different metals EMF is produced what is this affect called

A

Seebeck affect

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7
Q

Electricity produced by pressure on a crystal is called

A

Piezoelectricity (push electricity)

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8
Q

Light is

A

Electromagnetic radiation

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9
Q

The most common solar cell is called the

A

Photovoltaic cell

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10
Q

The magnetic lines of energy magnets produce is called

A

Magnetic flux

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11
Q

When passing a conductor through the magnetic field the flux affects it
This process is called

A

Electromagnetic induction

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12
Q

Faradays law of induction states that

A

Voltage in The conductor cutting the magnetic flux lines is proportional to the lines of force
As the material gets stronger so does the voltage

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13
Q

The middle of a generator is called an

A

Armature

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14
Q

Small circle things around the armature are the

A

Armature conductors

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15
Q

When you comb your hair and it loses negative electrons what is this called

A

Ellectrostatics

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16
Q

Two ways refrigeration uses electrostatics

A

Filtration
Precipitators

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17
Q

Precipitators charge dust particles by

A

Applying EMF to those particles

18
Q

Electrostatic is the least used EMF because

A

Low strength
High costs

19
Q

What is a magnet

A

An object that has the ability to attract magnetic materials

20
Q

Magnetism is

A

Measurable characteristics of a moving objects electrical charge

21
Q

When all the atoms in a magnet align this is called

A

Magnetic domain

22
Q

What is a temporary magnet

A

Magnet that is activated by an electrical current

23
Q

Temporary magnets in refrigeration are

A

Contractors, relays, control Valves, motors

24
Q

Industrial produced permanent magnets are made of

A

Hard steel

25
Q

U shaped magnet have how many points

A

2
South and north

26
Q

Symbol for magnetic flux

A

Greek capitol letter Φ phi

27
Q

Flux density is

A

Amount of lines of force around a magnet

28
Q

Permeability is the

A

Ability of a material to concentrate magnetic lines of force as compared to air

29
Q

Iron has a high

A

Permeability

30
Q

Air has a low

A

Permeability

31
Q

Permeability symbol in Greek is

A

(Mu) μ

32
Q

Reluctance is

A

Materials give resistance to magnetic flux

33
Q

Farrurs is

A

Magnetic material

34
Q

Magnetic saturation means

A

It can’t be more magnetized

35
Q

Retentivity

A

The ability to retain magnetism

36
Q

Residual magnetism

A

Magnetism stays in material when the force is removed

37
Q

You Can determine the direction of magnetic field using the

A

Left hand method

38
Q

Electromagnetism is

A

The interaction of the forces that electric fields and magnetic fields create

39
Q

Three basic factors of electromagnet

A

The amount of current in a coil
Number of turns in a wire
Type of core in coil

40
Q

Inductance is

A

Where current change forces the rise of voltage flowing in the reverse direction

41
Q

Self induction is the result

A

Current flowing through a coil creating magnetic fields around each wire these fields affect the current flow

42
Q

Mutual induction is

A

A change in current in one circuit cause an induced voltage in another circuit

Electrical Final (8 decks)

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