Physical parameters of cancellation for v₀ = 1, α = 0.1 and M_A0 = 0.01. (a) Rate of change (dψ/dt) of flux below the separator, for different values of the minority flux (F_p). (b) Length (L) of the current sheet for different values of F_p. (c) Rate (dW/dt) of energy conversion to heat for different values of F_p. (d) dW/dt for different values of F_p as a function of the null height z_s. In (b)–(d), the solution above L₀ > R₀ is cut off.