Resistivity

Resistivity

Resistivity

Resistivity is a measure of the resistance of a given size of a specific material to electrical conduction. Resistivity may also be referred to as the specific electrical resistance, or volume resistivity, although these terms are less widely used.

Resistivity

- The resistivity equation shows that:

- The longer the wire, the greater its resistance

- The thicker the wire, the smaller its resistance

Resistivity

• Resistivity is a property that describes the extent to which a material opposes the flow of electric current through it.

• Resistivity is measured in Ω m

• It is a property of the material, and is dependent on temperature

Multiple Choice

which has the highest current flowing through it?

• R1
• R2
• R3
• All the same

Multiple Choice

What happens to a resistor when the temperature is increased?

• Increases
• decreases
• stay the same
• vary randomly

Multiple Choice

Resistivity

• changes with conditions

• relies on dimensions of the material

• inversely proportional to resistance

• a property of the material

Multiple Choice

Resistance is proportional to

• l

• $\frac{1}{\rho}$

• A

• $\frac{1}{l}$

Multiple Choice

Which factor does not affect resistivity?

• Length

• Mass

• Cross-sectional area

• Temperature