Electrostatic Charging

Question 1

electricity that does not move or is static

Answer 1

electrostatics

Question 2

all electricity comes from ___ forces from atoms

Answer 2

electrical

Question 3

positive ions

Answer 3

protons

Question 4

negative ions

Answer 4

electrons

Question 5

the accumulaton of ___ is where electricity comes from

Answer 5

electrons

Question 6

neutral so there is equal number of protons and electrons

Answer 6

atoms

Question 7

center of the atom is the ___

Answer 7

nucleus

Question 8

nucleus is made up of ___ and ___

Answer 8

protons
nucleus

Question 9

orbit around the nucleus

Answer 9

electrons

Question 10

two types of electrical charges

Answer 10

positive charge
negative charge

Question 11

___ is conserved; meaning it is neither created nor destroyed

Answer 11

charge

Question 12

charge is also ___, that it occurs in discrete amounts

Answer 12

quantized

Question 13

when you charge something by any method, no charges are created or destroyed

Answer 13

conservation of charge

Question 14

which ion move from one atom to another?

Answer 14

electrons

Question 15

three types of charging

Answer 15

charging by friction
charging by conduction
charging by induction

Question 16

transfer of charge due to rubbing contact between materials

Answer 16

charging by friction

Question 17

electrons are transferred from one object to another by touching

Answer 17

charging by conduction

Question 18

electrons are grounded, which leaves a positive charge when a negative object is brought near

Answer 18

charging by induction

Question 19

when you rub one material to another they are charged by ___

Answer 19

friction

Question 20

the material losing ___ is positively charged

Answer 20

electron

Question 21

the amount of gained and lost electrons is __ to each other

Answer 21

equal

Question 22

production of electric charge on the surface of a conductor under the influence of an electric field

Answer 22

induction

Question 23

the advantage of charging by ___ is that it can be repeated many times without any loss of charge from the inducing specimen like the negatively charged rod

Answer 23

induction

Question 24

occurs when neutral objects are placed in contact with an already charged object

Answer 24

charging by conduction

Question 25

if the object is -, ____ will push some of the excess electrons from the charged to the neutral object

Answer 25

electric repulsion

Question 26

Touching a charged object to an uncharged object transfers some of the charge

Answer 26

contact charging

Question 27

A charged object is brought close to an uncharged object

Answer 27

induction charging

Question 28

This induces the electrons to move in the uncharged object.

Answer 28

polarization

Question 29

If contact is then provided to the ground electrons will flow onto or off of the object.

Answer 29

grounding

Question 30

In this case electrons would be attracted from the ground to the positive charge. If a negatively charged object had been brought close to the blue object, then electrons would be forced off of the blue object and would flow to the ground.

Answer 30

grounding

Question 31

This produces an object that has the opposite charge of the original charge.

Answer 31

objects charged by induction

Question 32

Rubbing two different materials together, a process known as

Answer 32

charging by friction

Question 33

, is the simplest way to give something a charge.

Answer 33

charging by friction

Question 34

Rub a piece of ebonite (very hard, black rubber) across a piece of animal fur. Explain what happens.

Answer 34

The fur does not hold on to its electrons as strongly as the ebonite. At least some of the electrons will be ripped off of the fur and stay on the ebonite. Now the fur has a slightly positive charge (it lost some electrons) and the ebonite is slightly negative (it gained some electrons).The net charge is still zero between the two… remember the conservation of charge. No charges have been created or destroyed, just moved around

Question 35

Rub a glass rod with a piece of silk. Explain what happens.

Answer 35

This is the same sort of situation as the one above. In this case the silk holds onto the electrons more strongly than the glass. Electrons are ripped off of the glass and go on to the silk. The glass is now positive and the silk is negativ

Question 36

Rather than try to keep track of all the combinations, we arrange common materials in a chart called an “

Answer 36

electrostatic series

Question 37

tendency to hold on electrons materials

Answer 37

sulphur brass copper ebonite paraffin wax silk lead fur wool glass

Question 38

Whichever material is closer to the top is holding electrons tightly so it will have a ___charge.

Answer 38

negative

Question 39

The material closer to the bottom has a greater chance of losing electrons, so it will be ___charged.

Answer 39

positively

Question 40

just means that the two objects will come into actual physical contact with each other

Answer 40

conduction

Question 41

If the two objects are brought close enough that an arc of electricity jumps between them, it counts as

Answer 41

conduction

Question 42

We bring the two objects close together. We will see a ___of charge happen in the neutral object as negative electrons are repelled to the right hand side

Answer 42

separation of charge

Question 43

If the materials used were ___, only the specific areas that actually touched would show any change in charge. That's because the charges can't move through the insulators easily.

Answer 43

insulators

Question 44

It is possible to charge a conductor without touching it. You do have to follow some special procedures. ● Most important is the use of a ___wire

Answer 44

grounding

Question 45

is simply a conductor that connects the object to the grounde

Answer 45

grounding wire

Question 46

Very early on physicists started using ___to measure very small charges on objects

Answer 46

electroscopes

Question 47

is made up of a couple of very thin metal leaves that hang down near to each other. They are connected to a metal rod that extends upwards, and ends in a knob on the end.

Answer 47

electroscope

Question 48

In this situation a negative object is brought nearby the electroscope. This causes free moving electrons in the electroscope to move ___into the leaves, leaving the top positive. Since the leaves both have negative charge they repel each other and move apart.

Answer 48

down

Question 49

Bring a positive object nearby and the free electrons in the electroscope all start moving up towards the top. This means the bottom has a net positive charge. The leaves will spread ___ again.

Answer 49

apart