Electircity

Question 0

can neutrons be added or removed?

Answer 0

Yes

Question 1

An electric charge can come in two forms:

Answer 1

Positive or negative

Exerts an electrical force

Question 2

If an atom has a negative charge it has more

Answer 2

Electrons

Question 3

If an atom has a positive charge it has more

Answer 3

Protons

Question 4

Atoms are made up of 3 parts

Answer 4

Protons neutrons and electrons

Question 5

A neutrally charged object is

Answer 5

An object with the same # of protons and electrons

Question 6

How do objects gain charges?

Answer 6

When electrons are transferred

Question 7

Static electricity is

Answer 7

The imbalance of electric charges on the surface of an object

Question 8

What are the two types of machines used to tell if an object is charged?

Answer 8

• a pithball electroscope

- metal leaf electroscope

Question 9

The definition of electric force is-

Answer 9

The force exerted by an object with an electric charge

Question 10

What are the laws of electric charges??

Answer 10

1) objects that have opposite charges attract each other

2) objects that have like charges repel one another

Question 11

The strength of the force is related to the ______ between the objects and the ____ of charge

Answer 11

Distance

Amount

Question 12

What is an induced charge shift??

Answer 12

Electrons shift positions In a neutral object when a charged object is brought near it

Question 13

What out of the 3 parts of the atom move

Answer 13

ONLY electrons move

Question 14

What are the 3 types of static electricity?

Answer 14

Charging by friction
Charging by conduction
Charging by induction

Question 15

How do objects with neutral charges become charged??

Answer 15

Friction!

Question 16

What is charging by friction

Answer 16

When two NEUTRAL objects are rubbed together or come into contact and an electric charge is transferred

Question 17

How is the electrostatic series arranged??

Answer 17

A list of materials that have been arranged according to their ability to hold onto electrons.
- the material with the stronger hold on it’s electrons will be more likely to keep them
Stronger = negative
-the material with the weaker hold on it’s electrons will be more likely to lose them when rubbed together
Weaker= positive

The weak electrons are at the top while the strong ones are at the bottom

Question 18

What is charging by conduction

Answer 18

When two objects with different amounts of electric charge come into contact with a charge and them transferred from one object to another
(Otherwise known as charging by contact)

Electrons will move from the more negatively charged object to the less negatively charged objects

Question 19

What is grounding??

Answer 19

Connection to an object that’s a large neutral body ( the ground, earth) that is capable of effectively removing an electric charge that the object has.
- the earth is so large it can spread out it’s electrons and maintain a neutral charge

Question 20

What happens to a positively charged object when grounded

Answer 20

Electrons move from the ground up into the positively charged object until it becomes neutral

Question 21

Can I be grounded??

Answer 21

When you touch another persons body you are being grounded.

The shalk you feel is the transfer of electrons.

Question 22

What is a conductor ?

Answer 22

A material that easily allows the movement of electrons
Ex: aluminum , silver
( metals are typically conductors )
Good conductors - copper gold iron mercury silver nickel
Fair conductors - human body silicon , graphite , salt water

Question 23

What is an insulator

Answer 23

A material that prevents or slows down the movement of electrons
Example : rubber and wood
( insulators typically have a strong hold on their electrons )
They protect us from coming into contact with conductors that are highly charged
Good insulators: wood paper rubber wool plastic wax Ebonite fur oil gas

Question 24

What is charging by induction

Answer 24

When a charged object is brought close to a neutral object it can cause the object to temporarily shift to take on an opposite charge
induced charge shift

Question 25

What are the two ways charging by induction occurs ??

Answer 25

Temporarily

Permanently

Question 26

Explain the temporary charge of induction

Answer 26

When a charged object is brought near the neutral object, the neutral object temporarily takes on a charge by electrons either moving closer or further away from the charged object.
induced charge shift
Once a charged object is taken away the temporary charge on the neutral object will disappear due to the electrons returning to their original evenly distributed locations

Question 27

Explain permanent charge by induction

Answer 27

Once a temporary charge has been created in a neutral object, it can become permanent if grounded.