Understanding Current Density and Conductivity

What is the unit of current density?

• Amps per meter squared

• Ohms per meter

• Volts per meter

• Amps per meter

Which symbol is used to represent current density?

• J

• A

• I

• E

In ohmic materials, what is the relationship between current density and the electric field?

• They are unrelated

• They are directly proportional

• They are equal

• They are inversely proportional

What does the Greek letter Sigma represent in the context of current density?

• Resistance

• Conductivity

• Electric field

• Charge density

Which material is considered a very good conductor based on its conductivity value?

• Air

• Glass

• Seawater

• Copper