Electricity unit vocab/terms/concept

Question 1

Atom

Answer 1

What everything i made of

Question 2

Proton

Answer 2

Positively charged particles of matter found in the nucleus

Question 3

Neutrons

Answer 3

Particle of matter with no charge

Question 4

Electrons

Answer 4

Negatively charged particle of matter that can move

Question 5

Electric charge

Answer 5

Carried by proton and electrons, opposites attract and likes repel

Question 6

Charge

Answer 6

A physical property of matter causing an object to experience attractive/repulsive forces when placed in an electromagnetic field.

Question 7

Electric Current

Answer 7

Rate at which electric charges ( Coulombs of electrons ) pass through a given area ( Amps )

Question 8

All electrons have the _______ charge?

Answer 8

1.6 x 10^-19

Question 9

what is the electron charge?

Answer 9

e= -1.6 x 10^-19 C

Question 10

What is the proton charge

Answer 10

y= 1.6 x 10^-19 C

Question 11

Unit for charge?

Answer 11

Coulomb, C

Question 12

The number of electrons in one coulomb of charge?

Answer 12

6.24x 10^18

Question 13

Coulombs’ Law

Answer 13

F = K q1 q2 / r^2

Question 14

What does Coulombs’ Law tell us?

Answer 14

tells us the FORCE between charges, like all forces, has units of Newtons.

Question 15

What the Sister of another mister law?

Answer 15

LAW OF GRAVITATION

Question 16

the strenght of an electric field can be determined using a __________

Answer 16

Test charge

Question 17

The standard Test charge?

Answer 17

Default test charge = ( proton ) 1.6 x 10^-19

Question 18

What’s an Electrical field?

Answer 18

Area of attraction —> Electricity can.

Question 19

electrostatics?

Answer 19

study of stationary charges

Question 20

What is the electrons in an atom surrounding the nucleus called?

Answer 20

Cloud

Question 21

Does Proton or Electrons separate from atom WITH RELATIVE EASE?

Answer 21

electron.

Question 22

A charged atom is called?

Answer 22

An ion
+ charge – due to loss of electron(s)
- charge – due to gain of electron(s)

Question 23

Law of Conservation of Electric Charge

Answer 23

Electrons are neither created or destroyed, they
simply transfer from one material to another;
electrons always in whole numbers

Question 24

Conductors?

Answer 24

electrons are free to move
around in the material

Saltwater, (most) metals, and humans conduct
electricity!

Question 25

Insulators?

Answer 25

electrons are tightly bound and do not move freely Cotton, rubber, and wood are all insulators!

Question 26

How can transfer happen?

Answer 26

Conduction, Friction, Induction.

Question 27

Transfer by conduction

Answer 27

When objects exchange charge by direct contact

Question 28

Transfer by friction

Answer 28

two objects rub together and transfer electrons

Question 29

Transfer by induction

Answer 29

When objects get close but do not touch and are then separated

Question 30

Polarization?

Answer 30

one side is slightly more positive (+) or negative (–) than the other side

Question 31

Polarization + Static Discharge =

Answer 31

Lightning!!

Question 32

Grounding?

Answer 32

when we allow charges to move off (or onto) a conductor by touching it to the ground

Question 33

What causes thunder?

Answer 33

Rapid expansion of air heated by lightning

Question 34

What is the K variable of Coulomb's Law?

Answer 34

proportionality constant - (9.0 x 109 Nm2/C2)

Question 35

What does + F mean?

Answer 35

Repulsion

Question 36

What does -F mean?

Answer 36

Attraction

Question 37

Definition of the electric field:

Answer 37

E = F / q0 SI UNIT: N/C Here, q0 is a “test charge” – it serves to allow the electric force to be measured, but is not large enough to create a significant force on any other charges.

Question 38

Electric Field Lines - If positive?

Answer 38

Arrows are away from the charge

Question 39

Electric Field Lines - If negative

Answer 39

Arrows are towards charge

Question 40

When the lines are close on electric field lines?

Answer 40

The field is strong.

Question 41

When the lines are far apart on electric field lines?

Answer 41

The field is weak

Question 42

Charges will always from for electric field lines ___________ charges to _________ charges?

Answer 42

POSITIVE CHARGES TO NEGATIVE

Question 43

Combinations of Field Lines

Answer 43

When the lines are less dense where the field is weaker. the field in NOT necessarily zero where there are no lines. THE area where the field is zero is . . . between two oppositely charged particles!!!

Question 44

How will the electrostatic force be changed if one charge is doubled? (Hint: Coulomb’s Law)

Answer 44

2x

Question 45

How will the electrostatic force be changed if the distance between the charges is reduced by ½? (Hint: Coulomb’s Law)

Answer 45

4x