1
Q
What is the equation for resistivity?
A
ρ = RA/l
2
Q
What is resistivity?
A
Resistivity is a measure of the resistance per unity length x cross-sectional area.
It is measured in Ohm meters (Ω)
ρ = RA/L
where: ρ = resistivity (Ωm), R = resistance (Ω), A = cross-sectional area (m²), L = length of wire (m)
3
Q
What do each of the symbols stand for in the equation for resistivity?
A
ρ = resistivity
R = resistance
A = cross-sectional area
l = length
AS Unit 1 - Electricity
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