Eletrical Principles: Topic 1-2

Question 1

Proton

Answer 1

Positively charged particles

Question 2

Electron

Answer 2

Negatively charged particles that orbit around the nucleus of an atom

Question 3

Neutral

Answer 3

Particles with no charge

Question 4

Charge separation

Answer 4

Concentration in specific areas of a neutral object

Question 5

Electrical discharge

Answer 5

Sudden transfer of electrical charge from one object to another

Question 6

Law of electrical charges

Answer 6

Like charges repel and unlike charges attract

Question 7

Electrical current

Answer 7

Steady flow of charged particles

Question 8

Circuit

Answer 8

Complete path that charged particles flow through

Question 9

Amperes

Answer 9

Unit of current

Question 10

Conductors

Answer 10

Material that electrical charge can move through

Question 11

Load

Answer 11

Device in a circuit that converts electrical energy to another form of energy

Question 12

Voltage (potential difference)

Answer 12

A measure of how much electrical energy a charged particles carries

Question 13

Volt

Answer 13

Unit of voltage

Question 14

Voltmeter

Answer 14

Used of measure voltage

Question 15

Short circuit

Answer 15

Electric current flowing down the wrong path with low resistance; often causes excess current flowing down the

Question 16

Insulators

Answer 16

Material that resists the flow of electricity

Question 17

Fuses

Answer 17

Thin piece of melt that breaks electrical circuit when too much electrical current passes through

Question 18

Circuit breakers

Answer 18

Special wire that heats up and turns off switch when too much electrical current flows through

Question 19

Electrochemical cell

Answer 19

A battery

Question 20

Dry cells

Answer 20

Cell that has electrolyte in the form of a paste

Question 21

Electrolyte

Answer 21

Liquid or paste that conducts electricity because it contains ions

Question 22

Ion

Answer 22

Electrically charged atom because it lost or gained electrons

Question 23

Electrodes

Answer 23

Two metals reacting with electrolyte

Question 24

Wet cells

Answer 24

Electrochemical cells with liquid electrolyte

Question 25

Primary cells

Answer 25

Electricity produced by a chemical reaction that cannot be reversed

Question 26

Rechargeable cell (secondary cell)

Answer 26

Electricity produced by chemical reaction that can be reversed with an external source to run electricity back through

Question 27

Battery

Answer 27

Set of cells together

Question 28

Electrolysis

Answer 28

Break down of a substance with electrical current

Question 29

Electrochemistry

Answer 29

Study of chemical reactions involving electricity

Question 30

Electroplating

Answer 30

Use of electricity to create a thin layer of metal onto an object

Question 31

Superconductors

Answer 31

Perfect conductors; have no resistance to electrical flow

Question 32

Resistor

Answer 32

Device having resistance to the passage of electrical current, used to control current in circuit

Question 33

Resistance

Answer 33

How difficult it is for electrons to flow through a substance

Question 34

Ohms

Answer 34

Unit for resistance

Question 35

Variable resistor

Answer 35

Ability to change resistance by adjusting the portion of the resistor the current travels through

Question 36

Ohms law

Answer 36

As long as temp remains constant, the resistance of the conductors remain constant and current is directly proportional to voltage

Question 37

Voltage drop

Answer 37

Voltage across a resistor or other device in a circuit

Question 38

Ammeters

Answer 38

Used to measure electrical current in amps

Question 39

Galvanometers

Answer 39

Device for detecting and measuring small electric currents

Question 40

Multimeters

Answer 40

Meter used to measure voltage, resistance or current

Question 41

Series circuit

Answer 41

A single pathway for current in a circuit

Question 42

Parallel circuit

Answer 42

Two or more paths for current to flow through

Question 43

Transistors

Answer 43

Device with three layers allowing the device to act like a switch or amplifier

Question 44

Microcircuits

Answer 44

Circuit made up of extreme small components