Conductors & Series Paralell Flashcards
What is soft-drawn copper normally used for?
Most insulated conductors within buildings
What is medium-hard and hard-drawn copper normally used for?
Aerial distribution as well as high voltage distribution and switchgear.
What common conductor is generally less expensive and lighter than copper.
Aluminum
What is the prime purpose of of steel conductors?
It is used to reinforce aluminum conductors to increase their tensile strength.
A solid conductor is…
A cable that is made of one long piece.
A stranded conductor is…
A cable made up of several smaller wires.
What is dielectric strength?
It is the electrical insulating strength of material.
Semiconductors are…
Neither good insulators or good conductors.
Name two materials used for semiconductors?
Silicon & Germanium
Examples of insulating material are…
Glass, rubber, mica, plastics, oil, paper, cotton, silk and air.
The resistance of a conductor is…
Directly proportional to the length of the conductor.
The cross-sectional area of the conductor is…
inversely proportional to the resistance of a conductor.
What are the most common forms of conductors?
Copper, aluminum and steel. Gold and silver can also be used but are impractical due to cost.
Factors that affect the resistance of a conductor are
Material
Area
Length
Temperature
Which conductive material increases in resistance the most when heated?
Iron
