Phisics End Unit Test

Question 0

How do atoms lose or gain electrons?

Answer 0

Due to friction.

Question 1

What part of an atom can jump from 1 to another

Answer 1

Electrons

Question 2

What happens to two objects when they rub together

Answer 2

The force of friction can remove electrons from 1 object and cause them to transfer to another object

Question 3

What attracts

Answer 3

+-
0+
0-

Question 4

What repels

Answer 4

++

–

Question 5

What NEVER repels

Answer 5

Neutral and neutral

Question 6

What r the three ways to charge objects

Answer 6

Friction
Contact
Induction

Question 7

How does something get charged by friction

Answer 7

Two objects are rubbed together

Question 8

What does the electrostatic series or the triboelectric series tell you

Answer 8

Which object will gain and which will lose electrons

Question 9

How do u charge something by contact

Answer 9

Neutral object can be charged when a + or - object touches it.

Question 10

How does the triboelectric series work

Answer 10

Items at top of list loose electrons and items at bottom of list gain electrons

Question 11

How do photocopiers use electrostatics

Answer 11

Ink is negatively charged

Paper charged positive where light was reflected

Question 12

On a scale of 1-5 how quickly do electrical charges transfer

Answer 12

5, very quickly

Question 13

Give 2 examples of electrical charges being transferred from one place to another

Answer 13

Lightning

Sparks

Question 14

How does lightning happen

Answer 14

Negative charges build up in bottom of cloud
Ground is charged positive due to induction
Negative electrons exit cloud and go to the ground or highest place like a house or tree or lightning rod

Question 15

How does the van de graaff generator work

Answer 15

Creates friction between roller and belt

Transfers electrons to large metal sphere

Question 16

Name 3 everyday electrostatics we would come in contact with

Answer 16

Dryer sheets
Spray painting
Photocopier

Question 17

How many paths r in a series circuit

Answer 17

1

Question 18

How many paths r in a parallel circuit

Answer 18

More than 1

Question 19

What does a battery look like

Answer 19

Bigger vertical line (+) on the left and smaller vertical line on the right (-)

Question 20

What does a lightbulb look like

Answer 20

Filament with a circle around it

Question 21

What does a resistor look like

Answer 21

Pointy line

Question 22

What does a switch look like

Answer 22

A dot at each end of the switch and a line on a 45 degree angle or flat

Question 23

What does fuse look like

Answer 23

Dot at each end and a sideways s in between

Question 24

What does an ammeter volt meter and motor look like

Answer 24

A, v, or m in a circle

Question 25

What is current electricity

Answer 25

The movement or flow of electric charges, electron, through conducting wires

Question 26

What is the path taken by the current called

Answer 26

Electric circuit

Question 27

What r the four main parts of an electric circuit

Answer 27

Source of energy Electrical load Control devices Connectors

Question 28

Give an example of and explain a source of electrical energy

Answer 28

Dry cell, or battery | Causes the electrons to flow

Question 29

Give an example of and explain an electrical load

Answer 29

Light energy for light bulbs, heat energy for toasters | Uses electrical energy, converting that energy into the form it needs

Question 30

Give an example of and explain control devices

Answer 30

Switch, fuse, circuit breaker | Limit, control or completely stop the flow of electrons through the circuit

Question 31

Give an example of and explain connectors

Answer 31

Wires | Connect everything together

Question 32

What is current

Answer 32

The amount of charge or number of electrons

Question 33

What is voltage

Answer 33

Amount of energy | Push of each electron

Question 34

What is resistance

Answer 34

Something that slows down the flow of electrons

Question 35

How is current measured | What's the letter it is represented by in the ohms law

Answer 35

Ampere (A) | I

Question 36

What is voltage measured in | What's the letter it is represented by in the ohms law

Answer 36

``` The volt (V) V ```

Question 37

What is resistance measured in | What's the letter it is represented by in the ohms law

Answer 37

The ohm | R