Induction and Grounding
Charge separation, grounding, and charging conductors without contact
|
Induction
Try this at home! Charged comb attracting a coke can
Show Me The Physics
School blocks YouTube?
Grounded, neutral objects
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
Show Me The Physics
1. A negative rod is brought near, 2. A negative rod is brought near,
Electroscope grounded
When Ground
Removed,
Electroscope Charge?
Positive
Electrons left Electroscope
Negative
Established 1995 Use any material on this site (w/ attribution) |
|||||||||||||||||||||
Check Your Understanding
5 quick questions — pick an answer to see if you’re right.
1. A negative rod is held near a grounded neutral object. What happens?
2. A positive rod is held near a grounded neutral object. What charge does the object get?
3. Compared with the charging rod, induction with grounding gives an object
4. Negative rod near an electroscope, top touched with a finger, rod removed, then finger removed. Final charge?
5. A charged comb pulls an empty, neutral soda can toward it without touching. Why?