Definitions

Question 1

Matter?

Answer 1

Anything that has mass or occupies space

Question 2

Electron?

Answer 2

one of the three major parts of an atom (negatively charged)

Question 3

Proton?

Answer 3

One of the three major parts of an atom (positive)

Question 4

Neutron?

Answer 4

Neutral particles within the nucleus of an atom

Question 5

Ion?

Answer 5

an atom that has gained either a negative or positive charge

Question 6

Element?

Answer 6

A single uncombined substance consisting of only one kind of atom

Question 7

Compound?

Answer 7

A type of matter consisting of two or more elements

Question 8

Molecule?

Answer 8

smallest particle into which matter may be broken down to and still retain its identity

Question 9

Atom?

Answer 9

The smallest particle into which an element may be broken down to and still retain its identity

Question 10

Nucleus?

Answer 10

Positively charged centre of an atom

Question 11

Conductor?

Answer 11

A material having 1, 2, or 3 valence electrons, and has appreciable flow

Question 12

Insulator?

Answer 12

Material having 5,6, or 7 valence electrons, will not permit any flow

Question 13

Semiconductor?

Answer 13

material having 4 valence electrons and is neither a good conductor or insulator

Question 14

Free electron?

Answer 14

An electron which is not bound to any particular atom

Question 15

Voltage?

Answer 15

The electromotive force or pressure which causes electrical current to flow

Question 16

Current?

Answer 16

General flow or drift of electrons

Question 17

Resistance?

Answer 17

opposition to current flow offered by material or circuit

Question 18

Volt?

Answer 18

basic unit of electrical pressure, one volt is the amount of emf which will cause one amp to flow through a resistance of one ohm

Question 19

Ampere?

Answer 19

Basic unit of measurement for the rate of electron flow. One ampere is the movement of 6.2x10 (18) electrons passing a given point in 1 second

Question 20

Ohm?

Answer 20

basic unit of resistance to current flow. One ohm will allow one amp of current to flow when the applied emf is one volt

Question 21

Closed circuit?

Answer 21

A complete or closed path for current to flow when the applied emf is one volt

Question 22

Open circuit?

Answer 22

An electrical path that is incomplete or broken-resulting in no current

Question 23

Short circuit?

Answer 23

A closed circuit of extremely low resistance- usually accidental

Question 24

Triboelectricity?

Answer 24

Name given to the production of electricity by friction

Question 25

Electrochemistry?

Answer 25

Name given to the production of the electricity by chemical means

Question 26

Piezoelectricity?

Answer 26

Name given to the production of electricity by applying pressure to a material

Question 27

Thermoelectricity?

Answer 27

Name given to the production of electricity by heating dissimilar metals

Question 28

Photoelectricity?

Answer 28

Name given to the production of electricity by light

Question 29

Magneto-electricity?

Answer 29

Name given to the production of electricity by magnets

Question 30

Live circuit?

Answer 30

electrical circuit connected to a voltage source

Question 31

symbol M means?

Answer 31

Mega and +6

Question 32

symbol K means?

Answer 32

kilo and +3

Question 33

symbol m means?

Answer 33

milli and -3

Question 34

symbol u means?

Answer 34

micro and -6