Electricity

Question 1

Causes Attraction (poles)

Answer 1

positive (protons)
negative (electrons)

Question 2

Causes Repulsion (2 poles)

Answer 2

negative (electron) / negative (electron)

positive (protons) / positive (protons)

Question 3

Difference / Similar Between Magnetism & Electricity

Answer 3

Difference: electricity single charges ALONE

Similar: attraction and repulsion of the charges

Question 4

Electric Force

Answer 4

attraction / repulsion between electric charges

Question 5

Electric Field

Answer 5

area around a charged particle - exerts on objects near it

Question 6

Positive Ion

Answer 6

1) arrow shows direction
2) length shows strength
3) charged particle has multiple fields

Question 7

Negative Ion

Answer 7

1) arrows faced in
2) length shows strength
3) charged particle has multiple fields

Question 8

Electrical Forces for Positive & Positive / Negative & Negative

Answer 8

pg 36

Question 9

Electrical Forces for Negative & Positive

Answer 9

pg 36

Question 10

Static Electricity

Answer 10

most objects are neutral - sometimes slight charge so + & - attract to each other

Question 11

If an Object Gains Electrons, Its Charge Is?

Answer 11

Negative

Question 12

If an Object Gives Away Electrons, Its Charge Is?

Answer 12

Positive

Question 13

3 Ways to Transfer Charges

Answer 13

1) Friction
2) Conduction
3) Induction

Question 14

Electroscope

Answer 14

equipment used to measure charged objects

Question 15

Friction & Example

Answer 15

opposing of force - ex. cloth rubbing stick

Question 16

Conduction Transfer & Example

Answer 16

transfer from touching objects - ex. hair and balloon

Question 17

Induction Transfer & Example

Answer 17

transfer from NOT touching produce electrical field - ex. lightning

Question 18

Static Discharge

Answer 18

when charged particles touch & become neutral

Question 19

Electric Current & Unit

Answer 19

flow of electric current - measured in amps

Question 20

Conductor & Example

Answer 20

material that electrons can flow through easily - ex. iron, silver, & copper

Question 21

Insulator & Example

Answer 21

materials that electrons can NOT flow through easily - ex. rubber, glass, & plastic

Question 22

Voltage

Answer 22

difference in electrical potential between 2 places in the circuit

Question 23

Resistance

Answer 23

how difficulty the charge is to flow

Question 24

4 Types of resistance

Answer 24

1) material used - conductor vs. insulator
2) length of wire - long = more resistance
3) diameter of wire - slimmer = more resistance - 1 line of electrons
4) path of least resistance -bird on wire - more resistance go through body

Question 25

Scientist 1st Battery

Answer 25

Alessandro Volta

Question 26

Electrochemcial Cell

Answer 26

converting chemical energy to electrical energy

Question 27

Wet Cell Battery & Example

Answer 27

electrolyte is a liquid - ex. car battery

Question 28

Dry Cell Battery & Example

Answer 28

electrolyte is a paste - ex. D/AA batteries

Question 29

Ohm's Law

Answer 29

regardless of the voltage into a conductor - the resistance will remain constant amount

Question 30

Features of a Circuit

Answer 30

run on electrical energy, need source, connected by wires

Question 31

Switch

Answer 31

allows electrons to flow when on/off electrons don't flow

Question 32

Series Circuit Advantage / Disadvantage

Answer 32

1 pathway - A: simple / easy design D: one light goes out, all go out & lights get duller

Question 33

Parallel Circuit Advantage / Disadvantage

Answer 33

more than 1 pathway - A: 1 goes out rest stay on & equal brightness D: more supplies needed

Question 34

Power Equation

Answer 34

power = voltage (volts) x current (amps)

Question 35

Electrical Bill

Answer 35

bill = energy (kilowatts) x time (hour)

Question 36

Personal Safety

Answer 36

least resistance - flow through body mess up heart, muscle, and breathing

Question 37

Grounding

Answer 37

if short circuit - causes current to flow to ground

Question 38

Fuses

Answer 38

device with metal strip that melts if too much electricity flow through

Question 39

Circuit Breaker

Answer 39

reusable switch to close or open a circuit

Question 40

Open Current

Answer 40

electricity will NOT flow - lost into the air

Question 41

Closed Current

Answer 41

electricity WILL flow - through the whole circuit