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1

Electron Affinity

Energy released or absorbed when an electron is added to an atom or molecule.

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2

Static Electricity

Accumulation of electric charge on an insulated body.

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3

Ohm's Law

The current through a conductor is directly proportional to the voltage across it.

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4

Temperature

Affects the relationship between current and voltage in a conductor.

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5

Resistance

Increases with temperature in a conductor.

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6

Short Circuit

Accidental low-resistance connection causing excess current flow.

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7

Electrical Safety

Precautions to prevent electric shock or hazards when working with electricity.

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8

Fuses

Safety devices that melt when current is too high, breaking the circuit.

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9

Circuit Breakers

Safety devices that trip to break the circuit when current is too high.

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10

Diodes

Semiconductor devices allowing current flow in one direction only.

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11

Three-Prong Plug

Electrical plug with grounding connection for safety.

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12

Investigating Ohm's Law

Activity to understand the relationship between voltage, current, and resistance.

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13

Charging by Contact

Transferring charge to an object by touching it with a charged object.

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14

Conduction

Movement of electric charge through a material.

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15

Conductivity

Measure of a material's ability to conduct electric current.

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16

Conductor

Material that allows the flow of electrical current.

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17

Coulomb (C)

Unit of electric charge in the International System of Units.

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18

Electric Charge

Fundamental property of matter that can be positive or negative.

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19

Electrostatics

Study of stationary electric charges or fields.

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20

Induction

Production of electromotive force when a conductor is exposed to a varying magnetic field.

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21

Law of Attraction

Opposite charges attract each other.

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22

Neutron

Electrically neutral subatomic particle found in the nucleus of an atom.

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23

Nucleus

Positively charged core of an atom, containing protons and neutrons.

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24

Alternating Current (AC)

Electric current that reverses direction periodically.

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25

Ammeter

Instrument for measuring electric current.

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26

Ampere (A)

Unit of electric current.

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27

Direct Current (DC)

Electric current flowing in one direction only.

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28

Dry Cell

Battery with low-moisture paste electrolyte.

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29

Electric Current (I)

Flow of electric charge in a conductor.

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30

Electrolyte

Substance containing free ions that make it electrically conductive.

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31

Fuse

Safety device that breaks an electric circuit if the current exceeds a safe level.

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32

Ohm (Ω)

Unit of electrical resistance.

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33

Potential Difference

Difference in electric potential between two points.

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34

Potential Energy

Energy held by an object due to its position or other factors.

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35

Resistance (R)

Opposition to current flow in an electrical circuit.

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36

Resistor

Component used to resist the flow of electrical current.

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37

Volt (V)

Unit of electric potential and electromotive force.

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38

Voltage (V)

Electric potential difference between two points.

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39

Ground Fault Circuit Interrupter (GFCI)

Device that breaks the circuit when it detects a ground fault or current leak.

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40

Electrical Discharge

Release and transmission of electricity in a material or across a gap.

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41

Electron

Subatomic particle with a negative electric charge.

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42

Electroscope

Device that detects the presence and magnitude of electric charge.

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43

Friction

Resistance encountered when one surface moves over another, generating static electricity.

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44

Grounding

Method of protecting against unwanted electrical charge by connecting to the ground.

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45

Insulator

Material that resists the flow of electric current.

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46

Law of Repulsion

Like charges repel each other.

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47

Lightning Rod

Metal rod connected to the ground to protect buildings from lightning strikes.

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48

Proton

Positively charged subatomic particle found in the nucleus of an atom.

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49

Static Charge

Stationary electric charge produced by friction.

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50

Battery

Device that converts stored chemical energy into electrical energy.

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51

Circuit Diagram

Graphical representation of an electrical circuit.

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52

Current Electricity

Flow of electric charge through a conductor.

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53

Electrical Circuit

Complete path through which electric current can flow.

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54

Electrical Load

Device in a circuit that consumes electrical power.

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55

Electrochemical Cell

Device that generates electrical energy from chemical reactions.

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56

Electrode

Conductor through which electricity enters or leaves a medium.

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57

Fuel Cell

Device that generates electricity through a chemical reaction without combustion.

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58

Ohmmeter

Instrument for measuring electrical resistance.

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59

Parallel Circuit

Circuit where the same voltage is applied to each component.

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60

Series Circuit

Electric circuit where components are arranged end to end.

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61

Switch

Device for making and breaking connections in an electric circuit.

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62

Transistor

Semiconductor device used to amplify or switch electronic signals.

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63

Voltmeter

Instrument for measuring electrical potential difference.

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64

Wet Cell

Battery with liquid electrolyte.

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