Sparks

Question 0

If two insulating materials are rubbed together what is the name of the charge?

Answer 0

Static electricity

Question 1

How can an insulating material become electrically charged?

Answer 1

If it is rubbed with another insulating material

Question 2

What is static electricity?

Answer 2

Electricity stays on the material and does not move

Question 3

Why does the electricity stay on the material and not move?

Answer 3

It is due to the transfer of electrons

Question 4

What charge do electrons have?

Answer 4

Negative

Question 5

What happens to the electrons in static electricity?

Answer 5

Electrons transfer from one material to another - 1 material has a positive charge and 1 ,arterial has a negative charge

Question 6

How do dusting brushes work?

Answer 6

The brushes get charged - they attract dust when they pass over it

Question 7

How can an object be discharged?

Answer 7

By earthing it

Question 8

What happens when an object discharges?

Answer 8

Electrons are transferred from the charged object to the earth.

Question 9

What happens if you become electrically charged?

Answer 9

Earthing can result in you getting an electrostatic shock

Question 10

How can some get an electrostatic stock by touching a water pipe?

Answer 10

Person charges by soles of feet and insulating floor e.g carpet rubbing together
Then touch water pipe e.g radiator which charge is earthed
Discharge occurs
SHOCK!

Question 11

How can static electricity be a problem in flour mills and petrochemical factories?

Answer 11

They have atmospheres that contain extremely flammable gases/high concentrated areas
Discharge of static electricity (spark) - explosion

Question 12

2 ways in which static electricity can be a nuisance?

Answer 12

• cause dirt and dust to be attracted to insulators e.g tv and laptop
• cause some fabrics to cling to skin

Question 13

Two insulating materials with the same charge will ….. each other

Answer 13

Repel

Question 14

Two insulating materials with different charges will ……. each other

Answer 14

Attract

Question 15

What happens to the material that loses the electrons?

Answer 15

It becomes positively charged

Question 16

What happens to the material that gains the electrons?

Answer 16

It becomes negatively charged

Question 17

Atoms or molecules that become charged are then called ….

Answer 17

Ions

Question 18

How can the chances of receiving an electric shock be reduced?

Answer 18

• ensuring appliances are correctly earthed
• using insulation mats effectively
• wearing shoes with insulating soles

Question 19

Why do lorries that contain flammable gases, liquids or powders need to be earthed before unloading?

Answer 19

Friction can cause a build-up of charge - could lead to a spark - ignite flammable substances

Question 20

How do anti-static sprays, liquids and cloths help to reduce problems of static electricity?

Answer 20

They prevent transfer of charge from one insulator to another