Electricity Flashcards
Atom
-Atom is the smallest unit In which an element can exist
Atom structure
- protons and neutrons are always found in middle if atom
- protons have positive charge
- neutrons have no charge
- electrons have negative charge and are buzzin around outside of atom
Types if static charge
Negative static charge- is caused when electrons are rubbed onto an atom
Positive static charge- when electrons are rubbed off of an atom
Detecting static
Touch- as we get close we can feel the charge. It can be quite dangerous
Electroscope- device used to detect presence of a static charge
Uses of static
Sandpaper, rubbing sticks to make fire, matches, Saran rap….
Measuring static charge
Static is measured in coulombs
Current
Moving electrons
In order for electrons to move they must have a pathway and a desire to move
Measured in amperes or amps (A) is a measurement if actual
Conductor
- Materials that allows electrons to move freely
- there are different qualities of conductors, good, super, and bad. NO PERFECT CONDUCTORS.
Examples of conductors
Super - gold&silver
Good- copper and aluminum (metals)
Fair- water
Insulators
Prevent electrons from moving
To control current where electrons move we always protect conductors with insulators
Examples of insulators
Air, dry wood, fiver glass, glass, ceramic.
No such thing as perfect insulator
Electrical potential
- desire for electrons to travel
- Measurement of what could be
- measured in volts
- store electrical potential in cells
Two ways to generate electrical potential
- separate opposite charges
- force like charges together
Series
-Series has a single pathway for electrons to travel
Effects:increase in voltage, no increase in duration, light gets brighter
Parallel
-more than one pathway for electrons to travel
Effects: there is no increase in overall voltage but an increase in duration.
