Unit 1 Atomic Structure

Front 1

What are the three principal parts of an atom and what charge does each carry?

Back 1

Electron -
Neutron No Charge
Proton +

Front 2

How many times larger is an electron than a proton?

Back 2

3 times the size

Front 3

How many times more does a proton weigh than an electron?

Back 3

1840 times more

Front 4

State the law of charges

Back 4

Opposite charges attract and like charges repel

Front 5

What force keeps an electron in orbit around the nucleus of an atom?

Back 5

Centripedal force

Front 6

How many valence electrons are generally contained in materials used for conductors?

Back 6

1 or 2

Front 7

How many valence electroncs are generally contained in materials used as insulators?

Back 7

7 or 8

Front 8

What is electricity?

Back 8

It is the flow of electrons

Front 9

What is a gluon

Back 9

A theoretical particle that bonds quarks together as well as protons and neutrons

Front 10

It is theorized that protons and neutrons are actually formed from a combination of smaller particles. What are these particles called?

Back 10

Quarks

Front 11

Which subatomic part of an atom contains a negative charge?

Back 11

Electron

Front 12

What subatomic part of an atom contains a positive charge?

Back 12

Proton

Front 13

What subatomic part of an atom contains no charge?

Back 13

Neutron

Front 14

The nucleus of an atom is formed by combining which two subatomic parts?

Back 14

Proton and Neutron

Front 15

What is electricity?

Back 15

A flow of electrons

Front 16

What are valence electrons?

Back 16

Electrons located in the outermost orbit of an atom

Front 17

What is a coulomb?

Back 17

A quantity of electrons equal to 6.25 x 10^18

Front 18

What is a conductor?

Back 18

A material that will permit electricity to flow through easily

Front 19

An insulator is made from a material that generally contains:

Back 19

7 or 8 valence electrons

Front 20

What is an insulator

Back 20

A material that hinders the flow of electricity

Front 21

A semiconductor is a material that generally contains

Back 21

4 Valence electrons

Front 22

What is direct Current?

Back 22

Current that flows in only one direction

Front 23

Define Voltage?

Back 23

1. Electrical Pressure
2. The difference in potential between two points
3. The force that drives or pushes the electricity through the wires.

Front 24

Which subatomic part of an atom contains a negative charge?

Back 24

electron

Front 25

The nucleus of an atom is formed by combining which two subatomic parts?

Back 25

Proton and neutron

Front 26

What is electrcity

Back 26

A flow of electrons

Front 27

What are valence electrons?

Back 27

Electrons located in the outermost orbit of an atom

Front 28

What is a coulomb

Back 28

A quantity of electrons equal to 6.25 x 10^18

Front 29

What is a conductor?

Back 29

A material that will permit electricity to flow through it easily

Front 30

An insulator is made from a material that generally contains how many valence electrons?

Back 30

7 or 8 valence electrons

Front 31

what is an insulator?

Back 31

A material that hinders the flow of electricity

Front 32

A semiconductor is a material that generally contains how many valence electrons?

Back 32

4 Valence electrons

Front 33

What is direct current?

Back 33

Current that flows in only one direction?

Front 34

What are lodestones?

Back 34

Natural magnets

Front 35

What is a variable resistor?

Back 35

A resistor whose value can be changed over a certain range

Front 36

What is a potentiometer?

Back 36

A variable resistor used as a voltage divider

Front 37

What determines the amount of voltage produced by a voltaic cell?

Back 37

The materials it is made of

Front 38

What is a thermopile?

Back 38

A group of thermocouple connected in series

Front 39

What device is used to easure the specific gravity of the electrolyte in a cell?

Back 39

Hydrometer

Front 40

What else is voltage referred as?

Back 40

Potential difference or electromotive force

Front 41

What is sometimes used to help protect objects from lighting?

Back 41

Lightning rods

Front 42

What are ferromagnetic materials?

Back 42

Metals that are easily magnetized

Front 43

Whenever an electric current flows through a conductor, what is formed around the conductor?

Back 43

Magnetic field

Front 44

When is a hollow core resistor commonly used?

Back 44

High power rating

Front 45

The basic building block of the universe is a?

Back 45

Atom

Front 46

The _____ is the unit of electrical power

Back 46

Watt

Front 47

How should a hollow core resistor be mounted?

Back 47

Vertically

Front 48

A part of an atom that has a positive charge is called a?

Back 48

Proton

Front 49

What is the purpose of mounting a hollow core resistor vertically?

Back 49

Heat dissipation

Front 50

An atom is built of three parts

Back 50

Proton, Neutron and electron

Front 51

Define an ammeter

Back 51

A device that measures current

Front 52

What functions are resistors commonly used for?

Back 52

Limit flow of current through the circuit
Voltage divider

Front 53

In a series circuit what is always constant

Back 53

Current

Front 54

In a parallel circuit, what is always constant?

Back 54

Voltage

Front 55

What is a quantity of measurement for electrons

Back 55

Coulomb

Front 56

The word static means?

Back 56

Not moving

Front 57

Magnetic lines of force are also called

Back 57

Flux

Front 58

Can a Primary cell be recharged

Back 58

No

Front 59

Can a secondary cell be recharged?

Back 59

Yes

Front 60

Thermocouples are what?

Back 60

A junction of two dissimilar metals that produce a voltage

Front 61

Piezoelectricity is produced when?

Back 61

Some materials are placed under pressure

Front 62

Is energy required to creaste a a magnetic field?

Back 62

Yes

Front 63

Is energy needed to maintain a magnetic field?

Back 63

no