Static Electricity!

Static Electricity!

STATIC ELECTRICITY! Electricity (?) All phenomena caused by positive and negative charges Static Electricity (?)

All the phenomena related to electrical charges at rest Positive and negative charges ONLY ELECTRONS MOVE

Static Charge Charging By Friction By Conduction By Induction

CHARGING: creating an imbalance of charges in an object Static Charge - FRICTION

FRICTION: pulls electron away from one of the objects and transfers them to the other Which one gets the electrons? Triboelectric Series

a.k.a. electrostatic series List of materials from ones that tend to lose e- (become positive)to ones that tend to gain e- (become negative) + Acetate Hair Wool

- Rubber Example (Wool and Rubber) List of materials from ones that tend to lose e- (become positive)to ones that tend to gain e- (become

negative) ***Note: Sometimes, the list is the other way around. Read the legend! Rubbing + Acetate Hair Wool - Rubber

Opposites Attract (Like Charges Repel) Attraction (+/-) Repulsion (+/+, -/-)

What do I do? A B C

C D A A *Important*

Only ELECTRONS move How to read the Triboelectric series Opposites attract/Like charges repel A few definitions

Conductor: allows free flow of electrical charges Insulator: hinders free flow of electrical charges

Static Charge CONDUCTION Charging by CONDUCTION: The charge of one object is shared between two objects when they come into contact.

Charging by CONDUCTION Static Charge - INDUCTION INDUCTION: The proximity (no contact) of the charged object causes the charges in the neutral object to separate

Static Charge - INDUCTION Charging by INDUCTION Charging by INDUCTION Summary Table

Charging By BEFORE DURING FRICTION

Rubbing transfers electrons from one object to the other CONDUCTION

Direct transfer of charge INDUCTION Proximity of a charged object causes a

separation of charges in the neutral object. AFTER

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