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1. Electrical resistors
1.1 Resistance and resistivity
The value of the resistance R (Ω) of a heating element of length (m), uniform cross-section S (m 2 ) and resistivity ρ (Ω · m) is given by the relationship :
The inverse of resistance C = 1/R is conductance.
Resistivity varies with temperature according to :
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Electrical resistors
Power supply for electric ovens
