Question

Define specific resistance. What is its SI unit? [2 MARKS]

Answer 1

Each point: 1 Mark

1. Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) quantifies how strongly a given material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of electric charge.
2. Resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is the ohm metre (Ωm)