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Electrical - ASVAB
Electronics Information ASVAB
31
Science
12th Grade
08/19/2010

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Cards

Term
Atoms:
Definition
Smallest particles that elements can be broken into and still retain the properties of that element. Made up of the nucleus and electrons.
Term
Particles found within the Nucleus and their charge:
Definition
Protons (+ charge) and Neutrons (neutrally charged)
Term
Electrons and their charge:
Definition
Electrons orbit the Nucleous and are (-) charged.
Term
For every 1 Protons there are __ Electrons:
Definition
1. For every Electron there is 1 Proton. Ex. If there are 5 Protons there are 5 Electrons.
Term
What is the Shell of the Atom:
Definition
The orbit around the Nuclious
Term
1st. Shell can hold __ electrons.
Definition
2
Term
2nd. Shell can only hold __ electrons
Definition
8
Term
3rd. Shell can hold __ electrons.
Definition
18
Term
Valence shell is the ______   _____  shell and determines whether the element is a _________ , a __________, or an ____________.
Definition
Valence shell is the outer most shell and determines whether the element is a conductor, a semiconductor, or an insulator.
Term
Electron Flow Theory:
Definition
Flow and sharing of electrons in a conductor.
Term

Voltage:


More voltage =


Measured with a:

Definition

Electrical pressure


more electrical pressure


voltmeter

Term

Current:

Measured in:

Definition

Rate of flow of electrons through a conductor

Measured in Amperes

Term
Amperes:
Definition
one coulomb of electrical charge flowing past a point in one second
Term
The 2 types of electrical current:
Definition
Direct Current (DC) and Alternating Current (AC)
Term
DC flows compared to AC that flows:
Definition

DC flows one way in a conductor (car battery)

 

AC current changes direction upon destination (back and forth) (household)

Term

Resistance:

 

Measured in:

Definition

Opposition to the flow of current.

 

1 ohm= amount of resistance allowed 1 ampere of current to flow if 1 volt of electrical pressure is placed on a conductor

measured in OHM Ω (omega) OHMmeter

Term
Most common examples of Conductors:
Definition
Silver, Copper and Aluminum
Term

The best conductor is ______ but the most

 

used conductor is __________ because:

Definition

Silver

 

Copper

 

Copper is cheaper than silver and copper is better than aluminum.

Term

Current & resistance are ________ _________.

 

Resistance ___ = Current ___

Definition

Inversely proportional

 

Resistance  + = Current -

Term

Voltage and Current are _____ _______.

 

Voltage _ = current _

Definition

Directly Proportional

 

Voltage + = current +

Term

OHM's Law:

 

Formula

Definition

[image]

 

Voltage in volts is = to the current in amperes X by the Resistance in OHM's

 

Formula E = I x R

Term

The OHM formula E = I x R

 

ID each of the  letters:

Definition

E= Electromotive Voltage, voltage

 

I = Intensity, current, flow of electrons

 

R = Resistance

Term
Electrical Power:
Definition
rate at which energy is provided to and consumed by an electric circuit
Term
Power is expressed in ____
Definition
Watts P= I x E
Term
The three essential components for a circuit:
Definition
a voltage source, a load, and conductors. = a closed circuit
Term
Infinite resistance or 0 current flow is described as an
Definition
Open Circuit
Term
A circuit that has only 1 path for all of its loads
Definition
Series Circuit [image]
Term
A circuit that is wired accross other loads so that if one fails the other will not be effected.
Definition
Parallel Circuit[image]
Term
A parallel circuit that has an on/off switch with a fuse.
Definition
Series-parallel circuit
Term
A component that can be utilized to limit current and/or voltage
Definition
Resistors
Term
electrical storage units
Definition
Capacitors
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