1.  The opposition of a material to the flow of charge through it.  Measured in ohms (  ).

2.  Materials with very high resistance do not readily allow charges to flow through them. These materials can be considered good insulators.  Materials with low resistance readily allow charges to flow through them. These materials can be considered good conductors.

3. Several factors affect the resistance of a conductor. These are: 1. Length 2. Cross-sectional area 3. Resistivity 4. Temperature

4.  The longer the wire, the higher is its resistance.  Resistance is directly proportional to length.

5.  The bigger the cross-sectional area of the wire, the lower is its resistance.  Resistance is inversely proportional to the cross-sectional area

6.  Wires of different composition have different resistivity (  )  The higher the resistivity of the wire, the higher is its resistance.  Resistance is directly proportional to the resistivity.

8. Effect of temperature on resistivity and resistance