chapter 6 Flashcards
electrons have what charge?
protons have what charge?
negative
positive
what is an atom made up of?
electrons
protons
neutrons
nucleus
what is an Ion?
atoms that can gain or lose electrons
anion= gain= negative charge
cation= lose= positive charge
what is static electricity?
atoms that move from atom to atom as well as from object to object
what is induction
contact with a charged object
what is the unit of charge?
Coulomb
lines points outward in a force field means what?
positive charge
line pointing inward in a force field means what?
negative charge
what is electric current?
the flow of a charge
unit of electric current?
Amps (A)
charges move one direction.
electronic devices, batteries, solar cells
What is this called?
direct current (dc)
electric field moves back and forth through wire.
current flows one way then the other with changing field.
what is this called?
alternating current (ac)
what is a conductor?
charge flows easy, many loosely attached electrons are free to move from atom to atom
what is an insulator?
charge does not flow easily, electrons are held tightly, restricted motion.
resistance factors are
type of material
length
diameter
temperature
chargers to do work is called what?
circuit elements
loss of electron current energy is what?
electrical resistance
examples of electrical resistance
collisions with other electrons in current
collisions with other charges in material
which of the following is most likely to acquire an electrostatic charge electric nonconductor electric conductor both are equal likely none of the above
electric conductor
what are the three circuit elements that contribute to work?
voltage source(v) electrical device(r) conducting wires(i)(a)
an electric current is measured in units of watt volt amp coulomb
amp
dry cell is a what
bettery
In an electric current, the electrons are moving?
at a very slow rate
