C2

• What is ohms law?

  The current through a conductor is directly proportional to the potential difference across it, provided that physical conditions (such as temperature) remain constant.
• Resistance is proportional to which feature?

  Length
• Resistance is inversely proportional to which quantity?

  area
• As temperature increases, what happens to resistance?

  increases
• What is the difference between resistance and resistivity?

  Resistance varies depending on dimensions of the material, resistivity is a quality of a material that does not change due to dimension but does still change with temperature
• What are extrinsic materials?

  materials that have values that depend on something else (e.g. Length or area)
• What is the equation for resistivity?

  ρ = R * A / L