The best resolution is typically obtained at the maximum field strength for which Joule heating is insignificant (i.e. near the boundary between the linear and nonlinear regimes of the Ohm's Law plot).
A mellor resulción obtense normalmente coa forza de campo máxima, na cal o quentamento de Joule é insignificante (é dicir, preto do límite entre os réximes linear e non liner do gráfico da lei de Ohm).