Static electricity

Question 1

in static electricity, the charges don’t….

Answer 1

move

Question 2

like charges_______
unlike charges _________
charged object _________ uncharged objects

Answer 2

repel
attract
attract

Question 3

in a solid what cannot be easily transferred from one object to another and what ca Abe transferred

Answer 3

proton = cannot
electrons = can

Question 4

objects become charged when ______ are moved from from one object to another

Answer 4

electrons

Question 5

Why can we not charge to objects by touching them together, why must we rub them together

Answer 5

It takes energy to remove electrons from there atoms

Question 6

How do cars and aircraft get static charges

Answer 6

by rubbing against the air and dust

Question 7

Static charges can be transferred from one object to another when they______

Answer 7

touch

Question 8

neutral and a negative =
positive and negative =
positive and neutral =

Answer 8

negative and negative
neutral and neutral
positive ans positive

Question 9

a substance in which electrons cannot move easily are called

Answer 9

insulators

Question 10

a substance in which electrons can move easily are called

Answer 10

conductors

Question 11

a substance in which electrons can move somewhat easily are called

Answer 11

semi-conductors

Question 12

which type of substance do we use to protect us from electrical shock

Answer 12

insulators

Question 13

which type of substance do we use to transport electrical shock

Answer 13

conductors

Question 14

which type of substance can build up large static charges

Answer 14

insulators

Question 15

when filling the gas tank, why must the gas nozzle be kept in contact with the gas tank

Answer 15

to keep the tank grounded so static charges cannot build up and cause a spark

Question 16

why do ships not build up static electric charges the way cars and airplanes do

Answer 16

the water has enough electrons and proton to move any static build up away from the ship

Question 17

hat does it mean to be discharged (use the term excess charge)?

Answer 17

to become neutral

Question 18

How is discharging in a positive object different from discharging in a negative object?

Answer 18

_a positive object will gain electrons, a negative object will lose electrons__

Question 19

Is the earth a good conductor, a good insulator, or somewhere in between

Answer 19

in-between

Question 20

Which contains more atoms, the earth, or an object like a car, person, or house?

Answer 20

the earth

Question 21

Why does contact with the earth cause objects to discharge?

Answer 21

electrons cab be added or____
___taken away without causing any significant change in the charge located in the earth

Question 22

Why do excess electrons leave objects at pointed tips?

Answer 22

_electrons are pushed to the tips

Question 23

Why does this not work at a rounded surface?

Answer 23

wider surface to discharge electrons_

Question 24

Why does humid air cause objects to be discharged

Answer 24

water molecules are good carriers of charge

Question 25

Summarize the three ways that you could cause an object to be discharged.

Answer 25

grounding
point discharge
humidity

Question 26

Why does static electricity build up more in the winter than the summer?

Answer 26

less humidity_

Question 27

Why do aircraft need discharge tips?

Answer 27

hey rub against air and dust when flying. Which cause static electricity

Question 28

How do cars get rid of their static build-up?

Answer 28

tires keep cars grounded

Question 29

Outline the steps that take place to produce lightning in a cloud.

Answer 29

i) updrafts and down drafts (wind currents) cause dust and ice crystals to rub and charge
by friction
ii) these charged particles collect in the top (usually +) and bottom (usually -) of the cloud
iii) the negative charge at the base of the cloud causes the ground to become + by induction
(electrons in the ground are repelled by the negative part of the cloud
iv) air molecules are pulled apart (ionized) by the opposite charges in the cloud and the
ground
v) these channels of ionized air allow electrons to flow from the cloud to the ground,
causing lightning to occur
This process starts at the ground level, so the flash of lightning progresses upwards

Question 30

what is grounding