The heat output of the electric stove spiral linearly depends on the temperature difference between the spiral and room air: N = κ(T−T₀). The resistance of the spiral also depends linearly on this difference: R = R₀[1 + α(T − T₀)], where R₀ is the resistance of the spiral at room temperature. To what temperature will the spiral heat up when the current I is passed through it?
8.4 Capacitors and non-linear elements in electrical circuits