Static

Page
1

Slide 1

Simple Atomic Structure

The structure of the atom

Two positive protons and two negative electrons

Gain an electron to become negative

Lose an electron to become positive

Slide 2

Charging Up Rods

+

+

-

-

-

+

+

+

-

-

+

+

+

-

-

-

Acetate

Polythene

Acetate positive

Cloth Negative

Polythene Negative

Cloth Positive

It’s all about moving electrons

Slide 3

Bringing Charges Together

Attract

Repel

Repel

Slide 4

The Electric Field

This is a region where a charge experiences a force

Neutral Point

The field is from + to -

Slide 5

The Gold Leaf Electroscope

Slide 6

Slide 7

The Test for Charge

The positive rod attracts the balloon

So the balloon must be negative

NO

The balloon is uncharged

Slide 8

The Test for Charge is Repulsion

This balloon must be negative

This balloon must be positive

Slide 9

Uses of Static Electricity

Spraying a Car

Positive Car

Negative Spraygun

The paint spreads out as each negative drop repels

No paint is wasted as the positive car attracts the negative paint

Slide 10

Removing Smoke from Power Station Chimnies

Positive Plate

Negative Plate

Charge up the Smoke

No smoke leaves the chimney

Slide 11

Earthing Petrol Tankers

Petrol rubbing against the pipe can build up a static charge which could cause an explosion

The tanker is joined to the ground with a wire to stop a charge building up