Understanding Resistance and Resistivity

What is the unit of measurement for resistance?

• Ampere

• Watt

• Volt

• Ohm

How is resistivity defined in terms of material properties?

• Power per unit resistance

• Resistance per unit length and cross-sectional area

• Voltage per unit current

• Current per unit voltage

Which variable is used to represent resistivity?

• V

• ρ (rho)

• Ω (omega)

• R

What happens to resistance if the length of a material increases?

• Resistance decreases

• Resistance becomes zero

• Resistance increases

• Resistance remains the same

Why is copper wire expected to have low resistance?

• Because it allows electricity to flow easily

• Because it has a high resistivity

• Because it is a poor conductor

• Because it has a large cross-sectional area