Try this at home!
Charged comb attracting a coke can
Show Me The Physics
YouTube Channel
School blocks YouTube? Use the file below.
Grounded, neutral objects
gain or lose
electrons by induction.
Case III - Negative rod/neutral object
Electrons are repelled down into the ground. Object becomes positive
Case IV - Positive rod / neutral object
Neutral object becomes negative as electrons are drawn up from the ground
Case V – Induction w/ grounded electroscope
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1. A negative rod is brought near,
top touched, finger removed, rod removed.
2. A negative rod is brought near,
top touched, rod removed, finger removed.
Electroscope grounded
When Ground
Removed,
Electroscope Maintains Charge
Electroscope Charge?
Positive
Electrons left Electroscope
 |
What would the charge on the the electroscope be if a positive rod were used?
|
Negative
|
Induction (with grounding) |
|
| Rod | Makes Electroscope |
| - | + |
| + | - |
| Conduction | |
| Rod | Makes Electroscope |
| - | - |
| + | + |
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