Van de Graaff`s
electrostatic generator
(1931)
electroscope
Conducting spheres
ELECTROSTATICS
ELECTROSTATICS
• Two types of electrical interactions
– two types of charges.
+ +
+ +
+ +
+ +
+ +
+ +
+ +
+ +
+ +
+
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
-
-
+ +
+ +
+ +
+ +
+ +
+ +
+ +
+ +
+ +
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
-
-
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
-
-
Effect of charge redistribution
induced charge
++
++
++
++
+
++
+
--
--
--
--
-
--
- -
-
-
+
Electrostatic induction
Charge transfer without direct
Charge transfer without direct
connection
connection
-
-
-
- -
-
-
+
+
+
+
+
+
+-
-
-
+
1.
-
--
--
-
-
+
+
+
+
+
+
+
+
+
2.
-- -
- -
-
-
+
+
+
++
+
+
-
- -
3.
• Two types of electrical interactions – two
types of charges.
• Electric field lines
+
_
+
_
+
_
Electrostatic mill
Document Outline
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
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- Slide 7
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