Chapter 3: Electricity Flashcards
Smallest unit of positive charge
Protons
Smallest unit of negative charge
Electrons
Free to move between orbitals and atoms
Electrons
What concerns the distribution and movement of electrons and has little to do with the positively charged protons locked within the atomic nucleus
Atomic Nature of Electricity
zero, neutral (so there wont be shock)
grounding
Electric charges at rest
Electrostatics
Repulsion
Attraction
Do like charges repel or attract
repel
Do unlike charges repel or attract
Attract
Force between two charges directly proportional to product of their magnitudes and inversely proportional to square of distance between them
Inverse square law
where is grounding located
secondary
-Charges reside on external surface of solid conductors
-attempt to repel each other due to negative charges
Distribution
where will the greatest concentration of chargers gather
they will gather at the sharpest area of curvature
Charges move along surface of solid conductor
Movement
What charges move along on solid conductor
Only negative
Abrasion of two conductive materials creates a transfer of charges between the materials
Friction
Physically touching a charged body to a neutral body, creates a transfer of charge
Contact
Bring a charged body in close proximity to a neutral object, without physical contact, creates a charge in the neutral object
- no physical contact
Induction
greatest concentration of charges will gather at sharpest area of curvature
Concentration
occurs when one object is rubbed on another
friction
occurs when two objects touch
- permits electrons to move from one object to another
Contact
how to electrons move
high to low concentration
Releases excess energy as light photons
static discharge
Used in operation of electronic devices
Process of electric fields acting on one another without physical contact
Induction
Electrodynamics consist of :
Movement of electrons(negative to positive)
Electric current
Properties of conducting materials
Electrical circuit
Electron sources
what is the flow of electrons
negative to positive
cathode to anode
Conventional current flow
From positive to negative
Due to movement of “electron holes” which is opposite to electron movement
