1. Static Electricity (p.145-148)
Describes all phenomena related to electrical charges at rest.
What happens when you rub a balloon on your hair?
Negative charges are transferred from your hair to the balloon.
As a result, the balloon becomes negatively charged and your hair positively charged.
ATTRACTION RESULTS

2. What are we talking about?
600 BCE
What will happen if you rubb amber against wool?

3. An electroscope
An apparatus used to detect the presence of static electricity in an object.
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4. YOU DRAW THE SCENARIOS SCAN!
Can you explain what is happening with the electroscope?

5. What are the forces between charges?
What happens when two positively-charged acetate rods are placed near each other?
acetate rods
The rods repel each other because they have the same overall charge.
rods repel
each other

6. How do opposite charges behave?
Why does this happen?
polythene rod
acetate rod
The polythene rod has an overall positive charge and the acetate rod has an overall negative charge.
The overall charges of these rods are opposite and so they attract each other.
rods attract
each other

7. Which one becomes positive?–
Plastic Sulphur
Gold
Rubber
Wood
Cotton
Paper
Silk
Lead
Wool
Glass +
In order to determine which object become positive and which becomes negative we use an electrostatic series.
SEE PAGE 146

8. What type of force would be felt between the following:–
Plastic Sulphur
Gold
Rubber
Wood
Cotton
Paper
Silk
Lead
Wool
Glass +
A glass rod, rubbed with wool is placed near another glass rod rubbed with rabbit’s fur.
Rubbed with wool
 Becomes POSITIVE
Rubbed with Amber
 Becomes NEGATIVE
ATTRACTION

9. True or False

10. Attraction or Repulsion

11. Static Charge with a balloon

12. How do we charge an object?
Friction: we have already seen.
Conduction: If an uncharged object is brought in contact with a charged object, the object will give its charge to the uncharged one.

14. 3) Induction: When a charged object charges an uncharged objects without contact between the two objects.

15. A ground is simply a large object that serves as an almost infinite source of electrons or sink for electrons.
A ground is simply a large object that serves as an almost infinite source of electrons or sink for electrons. A ground contains such vast space that it is the ideal object to either receive electrons or supply electrons to whatever object needs to get rid of them or receive them.

16. Homework Workbook Page 77 and 78
363MIQs