All Flashcards
Define resistivity.
Resistivity () is a material's intrinsic property that quantifies how strongly it resists the flow of electric current.
What is the unit of resistivity?
Ohm-meters ()
Define resistance.
Resistance (R) is the opposition that a substance offers to the flow of electric current.
What is the relationship between resistivity and resistance?
Resistance depends on a material's resistivity, length, and cross-sectional area.
What characterizes a good conductor in terms of resistivity?
Good conductors have low resistivity, allowing current to flow easily.
What characterizes a good insulator in terms of resistivity?
Good insulators have high resistivity, hindering current flow.
Label the axes for graphing resistivity of conductive dough.
Vertical Axis: Resistance (R), Horizontal Axis: Length/Area (L/A)
What is the difference between resistivity and resistance?
Resistivity: Intrinsic property of a material, independent of shape and size. Resistance: Depends on the material's resistivity, length, and cross-sectional area.
Compare conductors and insulators in terms of resistivity.
Conductors: Low resistivity, allowing easy current flow. Insulators: High resistivity, hindering current flow.