Electricity Practical

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Slide 1

Topic 7 - Electricity

Charges

Electrons

Voltage

Current

Series

Parallel

Resistance

The slides are designed to tie in with a set of worksheets, but could be adapted or serve as a template for other teachers

Slide 2

Topic 7 page 1

I charged up a plastic comb by

When I put the charged-up comb near some foil

rubbing it with a duster/pulling it through my hair

the foil jumped up to stick to the comb

Slide 3

Topic 7 page 2

Text

yes

yes

yes

no

yes

no

Slide 4

Topic 7 page 3

The electroscope

Stop!

Slide 5

Topic 7 page 4

Rises up

Rises up

Rises up

Rises up

If an uncharged object is brought near an electroscope the gold leaf

If a charged object is brought near an electroscope the gold leaf

doesn’t move.

rises up.

Slide 6

Topic 7 page 6

Pulling and Pushing

Pull together

Pull together

Pull together

Push apart

Push apart

Push apart

Slide 7

Topic 7 page 6

Is there a pattern?

Pull together

Pull together

Pull together

Push apart

Push apart

Push apart

same

Push apart

same

Push apart

same

Push apart

different

Pull together

different

Pull together

different

Pull together

Slide 8

Topic 7 page 6

5. If the charged objects are the same material then they

will repel

Slide 9

Topic 7 page 7

Where Does Charge Come From?

Slide 10

1. There are kinds of electrical charge called

2.a) To make an object positively charged you need to

b) To make an object negatively charged

you need to

3. If a substance is neutral it means that

Topic 7 page 7

two

positive and negative

remove negative charges

add negative charges

the negative charges are exactly balanced by the positive charges

Slide 11

Topic 7 page 8

4. Two charged polythene rods will repel

because