Electrostatics

Question 1

What is the electrostatics?

Answer 1

The study of charges at rest

Question 2

What is the charge of an atom at rest?

Answer 2

Neutral

Question 3

Are protons and electrons numbers the same?

Answer 3

They are equal

Question 4

Do atoms have net charge? Explain

Answer 4

No net charge. The overall charge is constant

Question 5

Explain the structure of an atom

Answer 5

Consists of a central neutral which contains protons and neutrons

Question 6

What are nucleons?

Answer 6

Protons + neutrons

Question 7

Which is the nucleus surrounded?

Answer 7

Electrons

Question 8

What do the positions of the electrons mean?

Answer 8

Electrons can leave or enter an atom. Which change the charge of a neutral atom

Question 9

How are objects charge?

Answer 9

Objects or charge through friction

Question 10

Define friction

Answer 10

Resistance to one surface or object encounters when moving over another

Question 11

When does friction occur?

Answer 11

Occurs when surfaces of two objects are rubbed together

Question 12

What is the process of electron transfer?

Answer 12

Result of two objects coming into contact with each other

Question 13

What is separating two objects known as?

Answer 13

The triboelectric charging

Question 14

What does tribo mean?

Answer 14

To rub

Question 15

What is the result of the triboelectric charging?

Answer 15

Results in one object gaining electrons on its surface and becoming negatively charged. Another object loses electrons and becomes positively charged

Question 16

Define triboelectric series

Answer 16

List that runs various materials according to the tendency to gain or lose electrons

Question 17

What does the top of the triboelectric series mean?

Answer 17

Very positive

Question 18

What does the bottom of the triboelectric series mean?

Answer 18

Very negative

Question 19

What happens when an object or atom loses electrons?

Answer 19

They become positively charged as there is a shortage of electrons

Question 20

What happens when an object or atom gains electrons?

Answer 20

They become negatively charged as there is excess electrons

Question 21

What can the two types of charges are cause objects to do?

Answer 21

Attract and repel

Question 22

What is two types of charges attract?

Answer 22

They pull together. One object is positively charged and the other object is negatively charged. Unlike charges attract

Question 23

What two types of charges repel?

Answer 23

Push away. Both objects are either positively charged or negatively charged. Like charges repel

Question 24

Before electrons have been transferred what type of charge does an atom have?

Answer 24

Neutral. Equal amount of positive and negative charges

Question 25

Do protons have the ability to transfer?

Answer 25

No protons are transferred. During the charging process the total number of negative and positive charges remain constant.

Question 26

What creates the charge of an object to become bigger?

Answer 26

More charges accumulate on the object

Question 27

When does charges transfer more readily?

Answer 27

Charges transfer more readily when the area is dry as there are no water molecules – third object

Question 28

What does the type of charge caused by friction depend on?

Answer 28

Depends on the kind of material rubbed together

Question 29

Define electroscope

Answer 29

Device used to detect the presence of a charge

Question 30

What is an electroscope constructed with?

Answer 30

Constructed with a metal plate which is the At the top of a metal rod. Thin foil leaves hang from the bottom of the rod. Foil can attract or repel

Question 31

What happens when the charge is put on the disc or cap?

Answer 31

It spreads down to the plate and leaf. The leaf and plate will have the same charge and therefore the charges will rip out. Delete rises away from the plate

Question 32

What has to happen for the leave to move further away from the rod?

Answer 32

The bigger the charge the more the leaf rises or deflects

Question 33

How can the leaf fall again?

Answer 33

By touching the disc or cap, which earths the electroscope. Electrons travel to the next item

Question 34

What is two ways can an electroscope be charged in?

Answer 34

Contacts and induction

Question 35

Define contact

Answer 35

Charged rod is touched on the surface of the desk. Some charges are transferred. Same charges as the leaf repels

Question 36

Define induction

Answer 36

Charged rod is brought close to the desk and then electroscope is earth. The rand is moved

Question 37

Define the Van De Graaf generator

Answer 37

A machine which uses friction to generate a large buildup of electric charge on a metal dome

Question 38

What happens when you bring something close to the Van De Graaf generator

Answer 38

You will get shocked

Question 39

What is the Graaf generator use to demonstrate?

Answer 39

The effects of electrostatic charge

Question 40

When does the big metal dome become positively charged?

Answer 40

When the generator is on

Question 41

How can the dome be discharge?

Answer 41

By bringing another insulated metal sphere close to the Dome

Question 42

Where will the electrons jump once you discharge the Graaf generator?

Answer 42

Electrons will jump to the dome from the metal sphere which causes a spark

Question 43

When the generator starts charging where does it transfer the charge?

Answer 43

To the person touching it

Question 44

Why does all the persons hair is repel when they touch the Graaf generator?

Answer 44

They're all receiving the same charge

Question 45

What is the principle of conservation of charge?

Answer 45

States that the net charge of an isolated system remains constant during any physical process

Question 46

Define isolated system

Answer 46

No other thing touching it

Question 47

What is the rule of electric charge?

Answer 47

It cannot be created nor destroyed it can only be transferred from one object to another

Question 48

What is the unit of charge?

Answer 48

Coulombs (C)

Question 49

What is the symbol of charge

Answer 49

Q

Question 50

When two objects Touch how long do the electrons transfer until?

Answer 50

To object touch the electrons are transferred into objects have the same charge

Question 51

What happens once the objects have the same charge?

Answer 51

The objects separate

Question 52

What is the objects separating once they have the same charge known as?

Answer 52

A force of repulsion

Question 53

What does the total charge before contact equal to?

Answer 53

Total charge before contact = total charge after contact. The total amount to charge in the system remains the same

Question 54

How do we calculate the charge on each object after they have been touch? Formula

Answer 54

Qnew = Q1+Q2/2