Electrical Principles and Technologies

Question 1

Static Electricity

Answer 1

A stationary electrical charge

Question 2

Proton

Answer 2

Positively charged particle in the nucleus of an atom

Question 3

Neutral

Answer 3

Description of an object that has equal amounts of positive and negative charges

Question 4

Charge Separation

Answer 4

Concentration of like charges in specific areas of a neutral object, caused by the approach of a charged object (Charged balloon against wall)

Question 5

Electrical Discharge

Answer 5

Sudden transfer of electrical charge from one object to another, indicated by a spark

Question 6

Electrical Current

Answer 6

Steady flow of charged particles

Question 7

Circuit

Answer 7

Complete path that charged particles flow through

Question 8

Amperes

Answer 8

Unit of electrical current

Question 9

Load

Answer 9

Device in a circuit that converts electrical energy to a different kind of energy

Question 10

Voltage

Answer 10

Measurement of how much electrical energy a charged particle carries

Question 11

Potential Difference

Answer 11

Change in potential energy of electrical charge compared to its potential energy at a reference point

Question 12

Volt

Answer 12

Unit of measuring voltage

Question 13

Voltmeter

Answer 13

Device to measure potential difference in volts

Question 14

Short Circuit

Answer 14

A circuit that has been broken

Question 15

Insulators

Answer 15

something that electrons cannot pass through

Question 16

Fuses

Answer 16

Thin piece of metal that melts to break circuit when excess electrical flow occurs

Question 17

Circuit Breaker

Answer 17

Same as a fuse but a special wire heats up instead of thin piece of metal

Question 18

Dry Cells

Answer 18

Electrolytes in the form of a paste

Question 19

Electrolyte

Answer 19

LIquid or paste that conducts electricity because it contains ions

Question 20

Electrodes

Answer 20

Conductor through which an electrical current enters of leaves a device or material

Question 21

Wet Cells

Answer 21

Electrolytes in the form of a liquid - usually acid

Question 22

Primary Cells

Answer 22

Cell that produces electricity by means of a chemical reaction that can’t be reversed

Question 23

Rechargeable Cells/Secondary Cells

Answer 23

Cell that produces electricity through a chemical reaction that can be reversed

Question 24

Battery

Answer 24

Set of cells connected together

Question 25

Electrolysis

Answer 25

Using electricity to split molecules into their original elements

Question 26

Electrochemistry

Answer 26

The study of chemical reactions involving chemistry

Question 27

Electroplating

Answer 27

Uses electricity to coat a metal with another different metal

Question 28

Superconductors

Answer 28

A material with virtually no resistance to electrical flow

Question 29

Resistor

Answer 29

Device used to slow down/resist the flow of electrical current

Question 30

Rsistance

Answer 30

Measure of how difficult it is for electrons to flow through circuits

Question 31

ohms

Answer 31

Unit of measurement for resistance

Question 32

Variable resistor/Rheostat

Answer 32

Resistor whose resistance can be changed

Question 33

MIllivoltmeter

Answer 33

Instrument used to measure small voltages

Question 34

ohms law

Answer 34

Law stating that as long as the temperature stays constant, the resistor of a conductor stays constant, the current matches the voltage

Question 35

Voltage Drop

Answer 35

Voltage across a resistor or other device in circuit

Question 36

Ammeters

Answer 36

meter used to measure electrical current in Amperes

Question 37

Galvanometers

Answer 37

Device used for detecting and measuring small electrical currents

Question 38

Multimeters

Answer 38

Meter that can measure voltage, current, resistance or current in a circuit

Question 39

Schematic diagram

Answer 39

Diagram using standardized symbols to show the connections and components in a circuit

Question 40

Parallel Circuit

Answer 40

Circuit in which the current can flow in 2 or more paths

Question 41

Transistor

Answer 41

Device with usually 3 layers with a tiny voltage in the middle that controls the current between the outer layers

Question 42

Microcircuit/integrated circuit

Answer 42

Circuit made up of miniaturized components

Question 43

Chemical Energy

Answer 43

Energy stored in chemical that is released when chemicals react

Question 44

Thermocouple

Answer 44

Device consisting of two wires of different metals joined, hot

Question 45

Electromagnet

Answer 45

Coil of insulated wire that becomes a magnet when current flows through it

Question 46

Commutator

Answer 46

Split ring breaking the flow of electricity, reversing connection of a coil

Question 47

Brushes

Answer 47

Makes electrical contact with commutor

Question 48

Armature

Answer 48

Rotating shaft in motor

Question 49

Direct current (dc)

Answer 49

Current flows in one direction

Question 50

Alternating Current (ac)

Answer 50

Current flows back and forth 60 times per second

Question 51

Transformer

Answer 51

Changes the amount of voltage

Question 52

Electromagnetic Induction

Answer 52

Generation of electric current in a conductor by changing magnetic field

Question 53

Power

Answer 53

The rate at which a device converts energy

Question 54

Watt

Answer 54

Unit of power equal to 1J/second

Question 55

Kilowatt hour

Answer 55

Used to record energy consumption in your home

Question 56

Efficiency

Answer 56

Ratio of the useful energy that comes out of a device to the total energy given

Question 57

Law of Conservation of Mass

Answer 57

-energy cannot be created or destroyed -Energy can only be transformed from one form to another

Question 58

Turbine

Answer 58

Alternative energy source using wind

Question 59

Nuclear Fission

Answer 59

Using heat to generate electricity but its radioactive

Question 60

Fossil Fuels

Answer 60

Use of things like coal being turned into energy

Question 61

Geothermal Energy

Answer 61

Using earths heat to generate electricity

Question 62

Biomass

Answer 62

Using heat to produce electricity while also producing greenhouse gases

Question 63

Cogeneration

Answer 63

Use of waste energy from process as another purpose

Question 64

Fuel Cells

Answer 64

Turning chemical energy into electric

Question 65

Non-renewable resource

Answer 65

Resource that cannot be reused/regrown

Question 66

Fly Ash

Answer 66

Fine, airborne ash produced by burning coal or other solid fuels

Question 67

Electrochemical Shells

Answer 67

Package of chemicals designed to produce small amounts of electricity