Y12 Resistivity quiz

What is resistivity?

• How resistive something is

• The resistance of an object divided by its mass

• A physical quantity of a material which tells you how much it impedes the flow of current.

• A physical quantity of a material which tells you how much it conducts electricity

Resistivity of an object can be calculated as long as you know (select all which apply):

• Length of object

• Resistance of object

• Mass of object

• Cross-sectional area of object

• Material the object is made out of

Resistance is proportional to...

• Length

• Resistivity

• Temperature

• Cross-sectional area

• Diameter

What is the relationship between voltage and resistivity?

• Voltage = (Current x Resistivity x Length)/Area

• Voltage = (Area x Length x Current)/Resistivity

• Voltage = Current x Resistivity

• Voltage = Current/Resistivity

I have six wires of known thickness and length, but they are made out of unknown metals. How could I use school equipment (nicked off Mr. Tomlinson) to find out what they are made of?

Resistivity is proportional to:

• Length

• Temperature

• Resistance

• Cross-sectional area