Conductors Flashcards
materials having many free electrons, able to carry an electric current
conductor
a material having few free electrons
insulator
an insulating material
dielectric
a measure of wire diameter
gang number
potential difference a layer of insulation can withstand without breaking down
dielectric strength
an enclosed channel designed for holding conductors
ampacity
nonconducting materials are called _____ as well as insulators
dielectrics
metals are good conductors, because they have many ______
free electrons
are all wires conductors?
yes
are all conductors wires?
no
wires and cables can be classified according to the kind of ________ they have.
covering
a _______ consists of two or more conductors inside a single covering
cable
two fundamental properties of insulation materials are called _________ and ________ .
insulation resistance
dielectric strength
which of the following materials is NOT good conductor?
aluminum, copper, porcelain, or silver
porcelain
which of following materials is NOT a good insulator?
clay copper rubber porcelain
copper
the potential difference that causes breakdown of insulation is called
breakdown voltage
what is the main purpose of soldering an electrical splice?
to make a good electrical contact
