Electrical Charges. All matter has electrical charges There are two types of charges: Positive...
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Transcript of Electrical Charges. All matter has electrical charges There are two types of charges: Positive...
![Page 1: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/1.jpg)
Electrical Charges
![Page 2: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/2.jpg)
All matter has electrical charges There are two types of charges:
Positive
Negative
If you have an equal number of positives and negative charges, it is neutral
Electrical Charges:
+
-
![Page 3: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/3.jpg)
There are 2 forces between charged objects:
Attraction Repulsion Opposite charges
“Opposites Attract”
Same charges
“Like repel”
![Page 4: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/4.jpg)
Sphere A is negatively charged.
A
When placed beside sphere B, they attract.What is the charge on B?
-BA
+
Opposites Attract!
POSITIVE
![Page 5: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/5.jpg)
Three charged spheres are suspended next to each other.
A B B C
If sphere A is negatively charged, what will happen when sphere A & C are suspended beside each other?
A C
- + + -+ +
Attract
![Page 6: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/6.jpg)
Four charged spheres are suspended next to each other.
A B B C C D
What will happen if A & D were suspended next to each other?
+ + + - - +
Repel
![Page 7: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/7.jpg)
You have three charged objects – A, B & C in a lab. You record the following results:
Test Observation
Bring “A” near “B” They repel
Bring “A” near “C” They attract
What would happen if “B” & “C” were brought together?
They would attract!!!
+ +
+ -+ -
![Page 8: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/8.jpg)
Electrostatic: All objects begin neutral & can
become positively or negatively charged
A positively charged object has more positives than negatives
A negatively charged object has more negatives than positives
![Page 9: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/9.jpg)
Electrostatic series is a list that ranks objects’ ability to take negative charges
Electrostatic Series:
RubberEbonitePolyethyleneCottonSilkWoolGlassAcetateFur / Hair
Items at top take negatives
Items at bottom lose negatives
Only negative charges move!Positive charges NEVER move!!
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Your cat rubs against a rubber balloon. What will be the charge on the balloon? Your cat’s fur?
Rubber Ebonite Polyethylene Cotton Silk Wool Glass Acetate Fur / Hair
Rubber
Fur / Hair
Items at top take negatives
Negatives
Rubber balloon
becomes negative
Cat’s fur becomes positive
![Page 11: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/11.jpg)
In a lab, you take a piece of neutral wool & neutral polyethylene & rub them together. What will be their charges?
Rubber Ebonite Polyethylene Cotton Silk Wool Glass Acetate Fur / Hair
Wool
Polyethylene
Items at top take negatives
Negatives
Polyethylene balloon
becomes negative
Wool becomes positive
![Page 12: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/12.jpg)
In a lab, you rub a piece of cotton & ebonite together. Then you rub a piece of silk & glass together.
Rubber Ebonite Polyethylene Cotton Silk Wool Glass Acetate Fur / Hair
Cotton is +
Silk is -They would
ATTRACT
You then bring the charged piece of cotton & the charged piece of silk
together. What will happen?
+
-
-+
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You rub your hair with a balloon. Explain using words & pictures, why your hair “sticks up”.
1st Hair & balloon are both neutral
2nd Rubber balloon takes negative charges from the hair. So, balloon becomes negatively charged & hair becomes positively charged
3rd Since hair is positive & like charges repel, hair sticks up!!!
++
++
+_ _
_
_ _
![Page 14: Electrical Charges. All matter has electrical charges There are two types of charges: Positive Negative If you have an equal number of positives.](https://reader035.fdocuments.in/reader035/viewer/2022062320/56649ce55503460f949b2e4b/html5/thumbnails/14.jpg)
Two types of charges – positive (+) & negative (-)
“Opposites Attract” “Like Repel”
Items at the top of the electrostatic series list take negative charges
Only negative charges move