Module 21 Static electricity

Friction is ...

• A contact forced in which objects are rubbed against each other. 

• A non-contact forced in which objects are rubbed against each other. 

• A contact force in which a charged object is brought close to an uncharged object.

The image alongside shows...

• Friction occurring

• The effects of static electricity

• The transfer of protons

Look at the atomic structure alongside and decide which subatomic particle can move/transfer to other objects during static electricity.

• Protons

• Neutrons

• nucleons

• electrons

Rubbing your hands together is an example of ...

• Friction

• induction

• Electrostatic attraction

An uncharged object has an equal number of _______ and electrons

A metal fork does not get charged when rubbed with a nylon cloth because metal is ...

• An insulator

• A conductor

• A shiny metal

Calculate the charge of the object alongside. (count the excess charges after cancelling pairs of electrons & protons)

• -4

• +4

• -2

• + 2

The ruler and cloth were initially neutral. the cloth was then rubbed onto the ruler. The object that has picked up a negative charge is the _____

Which set of objects will repel each other

• Object C

• Object A & B

• Object A & C

• Object B & C

Provide a term for the process occurring at point A

• Electrostatic force

• Friction

• Electrostatic discharge