




Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
An introduction to electric charge, its fundamental properties, and its interactions with other charges. Topics covered include the historical observation of electricity, the measurement of electric charge in coulombs, the attraction and repulsion of charges, and the concept of polarization. The document also discusses the transfer of electric charge between different materials.
Typology: Slides
1 / 8
This page cannot be seen from the preview
Don't miss anything!
Objects can be described by fundamental properties.
Mass, velocity, energy, temperature, volume, etc.
In ancient times is was observed that some itemsattracted small bits of material, especially when rubbed.
Fossilized tree sap called amber had this property.
Greek word for amber is
elektron
The property was called
electricity
.
Electric charge is measured in coulombs (C).
Electric charges come in small, but discrete units.
Electron charge is 1.6 x 10
Proton charge equal magnitude to the electron charge
Charges come in two types – positive and negative.
Electron is negative, proton is positive
The sum of all charges is conserved.
Rubbing a silk cloth ona glass rod chargeboth the cloth and rod.
-^
Extra electrons oncloth
The combination is stillelectrically neutral.
Positive and negativecharges may not beuniform in an object.
Charges can orientthemselves to attract toanother charge.
This is called^ polarization
-^
Allows neutral items tobe attracted.
Contact sequence from mostpositive to most negative:
-^
Rabbit Fur
-^
Glass
-^
Wool
-^
Silk
-^
Human Skin
-^
Cotton
-^
Wood
-^
Amber
-^
Rubber
next
Many items will transfer chargewhen they rub together.
If one item gains positivecharge, another item loses anequal amount to becomenegatively charged.
Different items are more likelyto gain positive or negativecharge.