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Basic Electricity & Applied Mathematics > Final Prep > Flashcards

Final Prep Flashcards

1
Q

What is electricity?

A

The flow of electrons.

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2
Q

Define Flux

A

Lines of magnetic force.

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3
Q

What type of current is produced by an armature cutting lines of magnetic flux?

A

AC

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4
Q

Resistance Rule in Parallel Circuits

A
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5
Q

What is the negative electrode in a battery called?

A

Cathode

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6
Q

What are the two types of Batteries?

A

Primary & Secondary

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7
Q

What is Power Law?

A

P = IE

Power = Current x Voltage

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8
Q

Ampere Rule in Parallel Circuits

A

The total current is the sum of all the currents through all branches of the circuit.

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9
Q

According to the Bohr Model how many electrons are in the shell #1(K)?

A

2

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10
Q

Name the three main parts of an Atom and their respective charge?

A

Proton (+), Electron (-), & Neutron (+-)

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11
Q

According to the Bohr Model how many electrons are in the shell #2(L)?

A

8

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12
Q

What is the coil in which voltage is induced by motion through a magnetic field called?

A

Armature

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13
Q

What device is connected to an armature in order to convert AC to DC?

A

Commutator

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14
Q

Electron Theory of Current Flow

A

Current flows from - to +

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15
Q

Voltage Rule in Parallel Circuits

A

The voltage across any part of the circuit is the same as the total voltage.

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16
Q

If a “AA” battery and a “D” battery were each connected to a load with identical resistance. Which battery would last longer?

A

The “D” battery has a greater surface area which increases it’s capacity, thus providing a higher ampere-hour rating than a “AA” battery.

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17
Q

According to the Bohr Model how many electrons are in the shell #3(M)?

A

18

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18
Q

A neutral wire is typically which color?

A

White/Grey

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19
Q

Using the Atomic number 13, and the electron orbit formula 2N2, is the element a conductor, semiconductor, or an insulator?

A

Conductor

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20
Q

Define Watt

A

Watt (W) is a measure of the amount of power used in a circuit.

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21
Q

Conventional Theory of Current Flow

A

Current flows from + to -

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22
Q

What is the ladder rule?

A

4:1 / For every 4 feet of ladder height you need to be a distance of 1 foot from the wall.

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23
Q

Define Reluctance

A

The resistance of magnetization.

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24
Q

Ampere Rule in Series Circuits

A

The current is the same at any point in the circuit.

25
Q

In a 3-way switch what is the wire running from the second switch to the load called?

A

Switch Leg

26
Q

Open Circuit

A

When an electrical circuit is incomplete.

27
Q

What is the positive electrode in a battery called?

A

Anode

28
Q

Define Ampere

A

Ampere (A) is a measure of electricity flowing through a circuit. 1A is equal to 1 Coulomb per second.

29
Q

What is Static Electricity?

A

A buildup of electrons sitting still without moving.

30
Q

Define Coulomb

A

6.25 x 1018 Electrons

31
Q

Voltage Rule in Series Circuits

A

The sum of all voltage drops across resistors must equal the voltage applied to the circuit.

32
Q

How many valence electrons does a semiconductor possess?

A

4-6

33
Q

How much current does it take to be fatal?

A

100-200 Milliamperes (.001-.002 A)

34
Q

What occurs when current flows through a conductor?

A

A magnetic field is generated around the conductor.

35
Q

Define Resistance

A

An Ohm (Ω) is a measure of the opposition to electricity flowing through a circuit.

36
Q

Closed Circuit

A

When an electrical circuit is complete and electricity is flowing.

37
Q

How many valence electrons does a conductor possess?

A

1-3

38
Q

Which of the two types of Batteries is rechargeable?

A

Secondary

39
Q

Define Saturation

A

All the magnetic domains in a material are aligned so that it cannot become magnetized further.

40
Q

Define Flux Density

A

The concentration of lines of magnetic force.

41
Q

A ground wire is typically which color?

A

Green

42
Q

What is Ohm’s Law?

A

E = IR

Voltage = Current x Resistance

43
Q

The Atomic number of an element is 13, how many protons and electrons does this element have?

A

13 Protons & 13 Electrons

44
Q

What is the most important rule to follow when working with electrical circuits?

A

To think… / Always make sure the circuit is de-energized.

45
Q

Resistance Rule in Series Circuits

A

The total resistance to current flow is equal to the sum of all resistances.

46
Q

How much power is consumed in a circuit containing 240 V, 20 A, and 12 Ω?

A

4800 W

47
Q

What is a Voltaic Cell?

A

Two dissimilar metals submerged in an electrolyte solution.

48
Q

Define Permeability

A

The ability to become magnetized.

49
Q

Define Voltage

A

Voltage (V) is a measure of electrical pressure. / The potential difference between two points in a conducting wire.

50
Q

Short Circuit

A

When a path to ground other than the intended path is established.

51
Q

How many valence electrons does and insulator possess?

A

7-8

52
Q

A common/hot wire is typically which color?

A

Black/Red

53
Q

Define Residual Magnetism

A

The ability of a material to retain magnetization.

54
Q

A 240 V circuit has a current flow of 20 A. How much resistance is connected in the circuit?

A

240 V / 20 A = 12 Ω

55
Q

What is the “Law of Charges”?

A

Opposite charges attract, and like charges repel.

56
Q

According to the Bohr Model how many electrons are in the shell #4(N)?

A

32

57
Q

In a 3-way switch what are the wires running from the first switch to the second switch called?

A

Travellers

58
Q

What is the maximum number of electrons that can occupy the outermost energy level or valence shell?

A

8

Basic Electricity & Applied Mathematics (19 decks)

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