Definitions
Electrical Conductor
is a material through which charge can flow easily
20.2
What is the Law of Conservation of Charge?
the total charge in a system is constant so that the total charge before charges are transferred is the same as after
List the two types of current
direct current and alternating current
What is the difference between a series circuit and a parallel circuit?
a series circuit has only one path for the current. a parallel circuit has two or more paths for the current.
what are two types of semi conductors?
n type and p type
Electric Force
the force of attraction or repulsion between electrically charged objects
20.1
How is net charge produced?
an excess or storage of electrons produces a net electric charge
name the two good electrical conductors and two good electrical insulators
good conductors: silver, copper, good insulators, air, and plastic
name two elements included in a circuit diagram
a source of electrical energy, one or more devices that use electrical energizing, conducting wires
describe how electron flow if controlled in a vacuum tubes
Series Circuit
in a series circuit, charge only has one path through which it can flow
20.3
Name 2 factors that affect the strength of an electric field
net charge and distance from the charge
length, thickness, and temperature
name five safety devices used with electrical current
fuses, circuit breakers, insulation, grounded three-prong plugs, and ground fault circuit interrupters
how are electronic devices used to process information?
electronic devices process information by using the electronic current to form patterns called analog and digital signals.
Integrated Circuit
is a thin slice of silicon that contains many solid-state components
20.4
What determines whether charges attract or repel?
if charges are alike, they will repel. Opposites charges attract
what is a superconductor?
a superconductor is a material that has almost zero resistance when cooled to a low temperature
write the equation for calculating electric power
p = I x V
how are microchips beneficial for communication devices?
microchips make communication devices more portable, reliable, and affordable.
Static Electricity
is the study of the behavior of electric charges, including how the charge is transferred between objects.
When a glass rod is rubbed with neutral silk, the glass becomes positively charged. What charge does the silk now have.
the charge on the silk must be negative because the charge is conserved.
What causes charge to flow?
a source of electrical energy causes charge to flow
you plug in a string of holiday lights and notice that the entire string turns off when you remove one bulb. Explain why this happens
the bulbs are connected in a series circuit. when one of the holiday lights burns out, the entire string stops.
how are solid state components used?
solid state components are used to control modern electronic devices