Length (l), Area (A), Resistivity(ρ, Greek letter 'Rho')
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Define Resistivity
the resistance of a 1m length with a 1m^2 corss-sectional area.
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What unit is resistivity measured in?
Ohm-Metres (Ωm)
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Equation for resistivity
ρ=RA/l
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What are superconductors
Superconductors are conductors that have zero resistance
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Uses of superconductors
Power Cables so they can transmit electricity without losing any power. Electronic circuits they work fast as there is no resistance. Really stron electromagnets that don't need a constant power source
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Other cards in this set
Card 2
Front
Define Resistivity
Back
the resistance of a 1m length with a 1m^2 corss-sectional area.
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