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CHARGING BY
INDUCTION &
CONDUCTION
STARRING
THE ELECTROSCOPE
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+ +
+ +
- --
- -- -
Neutral Electroscope
Charges are balanced
+
+
+
+ +
+ +
- -
- -- -
-
No Reaction
Neutral rod brought near
--++
+-
+
+
+
+ +
+ +
- -
- -- -
-
Negative charge by Induction
Negative rod brought near
--
--
-- --+
++
-
+
+
+
+ +
+ +- -
- -
- -
-
Temporary Dipolar charge
Same charges repel
--++
+-
--
--
-
Electrons move down to leaves
Leaves become negative
--++
+-
--
--
- --
--
--
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+
+ +
+ +- -
- -
- -
-
Remove negative rod
Leaves will collapse
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+
+
+ +
+ +
- --
- -- -
Back to Neutral Electroscope
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+ +
+ +
- -
- -- -
-
Positive Charge by Induction
Positive rod brought near
-+
++
+
+
+
+ +
+ +
---- --
-
Temporary Dipolar ChargeSame charges repel
Electrons move up to sphere
Leaves become positive
-+
++
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+
+
+ +
+ +
---- --
-
Leaves will collapse
Remove positive rod
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+
+ +
+ +
- --
- -- -
Back to Neutral Electroscope
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+
+
+ +
+ +
--
- -- -
Negative Charge by Conduction
Negative rod makes contact
--
-- -
--- -+
+- - -
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+
+ +
+ +- -
- -- -
-
+++ -
+ +
+ +-
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-
-
-
-- -
- -
-
-
-
--
--
--
Electrons are added
Creates a Bridge
Like charges repel
Leaves become negative
--
-- -
--- -+
+- -
+
+
+
+ +
+ +- -
- -- -
-+ +
+ +-
- ---
-- -
- -
-
--
-- -
--
-
Permanent Negative Charge
Remove Negative Rod
Like charges still repel
Leaves stay negative
+
+
+
+ +
+ +- -
- -
--
-+ +
+ +
-- -
-
--
- -- -
-
-
-
--- -
--- ---
-
Ground Negative Charge
Touch sphere with finger Extra Electrons are removed
+
+
+
+ +
+ +
- --
- -- -
Back to Neutral Electroscope
Charges are Balanced
+
+
+
+ +
+ +
- -
- -- -
-
Positive Charge by Conduction
Positive rod makes contact
-+
++
+
+
+
+ +
+ +
--
Electrons are removed
Creates a bridge
Like charges repel
Leaves become positive
-+
++ - -- -- -
- -
+
+
+
+ +
+ +
--
Permanent Positive Charge
Remove positive rod
Like charges still repel
Leaves stay positive
+
+
+
+ +
+ +
--
Ground Positive Charge
Touch sphere with finger Electrons are replaced
- - - - -
+
+
+
+ +
+ +
- --
- -- -
Back to Neutral Electroscope
Charges are Balanced
