10 C Section review Flashcards
Contrast static electricity & current electricity (what is the difference?)
Static electricity is the quick discharge of excess electrons. Current is the continuous flow of charges.
Compare the two models of how electrons flow through a conductor.
Electron diffusion theory says electrons move from area of high concentration to area of low concentration & current happens. Cease of a continuous supply of electrons. Another model is like a stream flowing downhill where electrons flow from a point of higher electrical potential energy to a point of lower electrical potential energy. Higher place is source, lower is sink.
How does conventional current compare to electron current?
Conventional current flows in opposite direction of electron current.
Justify the use of the conventional current model.
Cell phones and digital cameras.
What is the name for current that flows in one direction?
Direct current.
In what two ways can this kind of current be produced?
.
What are the minimum components needed for an electrical circuit to do useful work?
.
What device allows us to control whether or not current flows in a circuit?
Switch
Name four man-made sources of electrons that could produce an electrical current.
.
Which recycle electrons?
.
What is the unit for electrical potential difference?
Volt.
How is the unit for electrical potential difference defined in terms of other SI units?
.
What is the unit of electrical current?
Ampere.
How is the unit of electrical current defined in terms of other SI units?
.
What is the unit of electrical resistance?
Ohm
