Quiz 1 Electricity

Flashcards for our first quiz

Electric Shock

The physical sensation resulting from current through the body

Engineering Notation

A system for representing any number as a one-, two-, or three-digit
number times a power of ten with an exponent that is a multiple of 3

Exponent

The number to which a base number is raised

Metric Prefix

A symbol that is used to replace the power of ten in numbers expressed in engineering notation

Power of Ten

A numerical representation consisting of a base of 10 and an exponent; the number10 raised to a power

Atom

The smallest particle of an element that retains the characteristics of that element

Electron

The most basic particle of negative electrical charge

Proton

The most basic particle of positive electrical charge

Ion

An atom that has gained or lost an electron and is no longer neutral

Cation

A positively charged ion

Anion

A negatively charged ion

What is the symbol for Charge? What is its unit?

Q; Coulombs

Charge

Electric Charge is the property of subatomic particles that causes it to experience a force when placed in an electromagnetic field

Coulomb (C)

The unit of electrical charge; the total charge possessed by 6.24 × 1018 electrons

Coulomb’s Law

A law that states that a force exists between two charged bodies that is directly proportional to product of the two charges and inversely proportional to square of the distance between them

Free Electron

A valence electron that has broken away from its parent atom and is free to move from atom to atom with the atomic structure of a material

What is the symbol for Voltage? What is its unit?

E; volts

Ampere (A)

The amount of current that exists when a number of electrons having a charge of one coulomb move past a point (cross-sectional area) in one second. Unit of electrical current

Current (I)

The rate of flow of charge

Voltage (E)

The electrical potential difference between two points in a circuit (a,b). It represents the amount of energy available to move electrons from one point to another (a to b) in an electrical circuit

Volt (V)

The unit used to measure voltage. One volt equals one joule of energy per coulomb of charge (1 V = 1 J/C)

Power (W)

The rate at which energy is used (transferred or transformed. Measured in Watts

1 Volt =

1 Joule / 1 Coulomb

Energy / Charge

W / Q

1 Amp =

1 Coulomb / 1 Second

Charge / Time

Q / T

A basic circuit consists of…

…a voltage source, a load, and a path for current between the source and the load

In a closed circuit…

The current flows

In an open circuit…

The current does not flow

A short circuit is…

A connection that provides a low-resistance path for current, diverting it
from the intended path

Switches are used to…

Control the opening and closing of circuits

Fuses and circuit breakers…

Protect the circuit when the current exceeds a set value

Which circuit breakers are not used in aviation?

Automatic Reset

Wires vary in diameter and are sized according to…

American Wire Gauge (AWG) sizes

The resistance of a wire is determined by…

The type of material

The length of the wire

The cross-sectional area

The temperature

Ground

The common or reference point in a circuit

Load

An element (resistor or other component) that draws current from the source and upon which work is done