Electricity - Module 1

Question 1

What are the 3 types of sub-atomic particles?

Answer 1

Electron Neutron Proton

Question 2

What are each of the sub-atmoic particle charges?

Answer 2

Electron = Negative
Proton = Positive
Neutron = Neutral

Question 3

What are the electrons on the outer shell called?

Answer 3

Valence electrons or valence shell

Question 4

What is electrical polarity?

Answer 4

When there is an accumulation or lack of electrons
Lack of = positive polarity
Accumulation = negative polarity

Question 5

What is a conductor and how does it work?

Answer 5

A conductor is a material that allows electricity to flow easily due to its valence electrons being easily detachable from the nucleus

Question 6

What is conventional and electron flow?

Answer 6

Conventional flow is the flow of the current moving through a circuit from positive to negative
Electron flow is the opposite of conventional flow, electrons flow from negative to positive terminal

Question 7

What is an insulator? Why does it do what it does?

Answer 7

An insulator does NOT allow electricity to flow due to having difficult valence electrons that do not conduct electrical charges

Question 8

What is a semiconductor? What is their importance?

What is an example of a semiconductor?

Answer 8

Semiconductors are neither conductors nor insulators. They allow a specific amount of electrons to flow through them due to their structure. (4 valence electrons that create crystalline formations)

Silicon is a semiconductor

Question 9

Examples of Conductors

Answer 9

Metals such as copper, silver, gold, etc.

Question 10

Examples of insulators

Answer 10

Glass, Rubber, wood

Question 11

How does a battery work in terms of charges?

Answer 11

The negative end repels electrons and the positive end attracts electrons. This is facilitated through a chemical reaction.

Question 12

What form of electricity happens when you rub your feet on a carpet?

Answer 12

Static electricity

Question 13

Unlike charges_____and like charges______

Answer 13

Attract, Repel

Question 14

What is a coulomb? What is it equal to?

Answer 14

It is the unit of electrical quantity or charge

An Ampere is used to calculate Coulombs

Question 15

What is the definition of Current?

Answer 15

Current is the flow of electrons through a circuit in a single direction

Question 16

What is an Ampere? What do we use to measure this?

Answer 16

An ampere is the measurement of electric current through a circuit (An ampere is a measurement of the current)

An ammeter is used to measure the amperes

Question 17

How is energy defined? What are the 2 types?

Answer 17

Energy is the capacity for performing work

Kinetic and Potential

Question 18

What is the force that forces current through a wire called? What is an example?

Answer 18

Electromotive force (emf)

A Battery is an emf

Question 19

What is the definition of Voltage?

Answer 19

The amount of electrical pressure that exists between two points

Question 20

How many electrons are inside 1 coulomb?

Answer 20

6.25 x 10^18

Question 21

What is the current of a wire if 150 C of charge pass by in 25 seconds?

Answer 21

6amps (I = Q/T) (Current = QUANTITY OF COULOMBS divided by TIME

Question 22

What is an Ohm?

Answer 22

An Ohm measures the resistance in a circuit

Question 23

The______of a conductor is directly proportional to its length

Answer 23

Resistance,

Question 24

There are 2 factors that affect the resistance of a conductor. What are they?

Answer 24

Length, Type

Question 25

If voltage increases, current_______

Answer 25

increases

Question 26

If resistance decreases, current________

Answer 26

increases

Question 27

If voltage decreases, current_______

Answer 27

decreases

Question 28

If resistance increases, current______

Answer 28

decreases

Question 29

If voltage increases, resistance________

Answer 29

stays the same

Question 30

If resistance increases, voltage_______

Answer 30

stays the same

Question 31

If resistance is halved, current is _______

Answer 31

doubled

Question 32

If resistance is doubled, current is ______

Answer 32

Halved

Question 33

What is direct current?

Answer 33

DC is the flow of electrons in one direction only, and is constant and consistent

Question 34

What is Alternating Current?

Answer 34

AC is the direction of electrons flowing in one direction then into the other direction (polarity switches)

Question 35

What is pulsating DC?

Answer 35

The flow of electrons in a single direction in a pulsing waveform. The polarity of the electrons do not reverse.

Question 36

What is it called when a magnetic field is established around a current carrying conductor?

Answer 36

Electromagnetic generation

Question 37

What happens to the steel bar if we were to flip the current through the coil?

Answer 37

The poles (North and South, negative and positive) would flip

Question 38

How do rotating machines create commercial electricity? What is the process called?

Answer 38

The process is called electromagnetic induction

Question 39

What are the 4 sources of an emf? (How can we create an emf?)

Answer 39

Electromagnetic Induction Piezoelectric Sources Photovoltaic Sources Thermoelectric Sources

Question 40

What is the electricity?

Answer 40

The flow of electrons from one atom to the next

Question 41

What makes a material a conductor, insulator, or semiconductor?

Answer 41

How easy or difficult it is to dislodge the valence electrons

Question 42

Silicon is a ___________

Answer 42

semiconductor

Question 43

Glass, Rubber, plastics are examples of__________

Answer 43

insulators

Question 44

Metals that have an abundance of free electrons are known as __________

Answer 44

conductors

Question 45

What is the region on a conductor where magnetic properties are produced?

Answer 45

The magnetic field