L lagging current In a series RLC circuit, if the capacitive reactance XC is less than the inductive reactance XL, the current is lagging behind the voltage by a phase angle φ = tan−1[(XL −XC)/Z].

Lalande cell The zinc-copper oxide cell invented by F. de Lalande and G. Chaperson in 1881 is known as the Lalande cell. It consists of a zinc anode and copper oxide cathode in a KOH electrolyte. It is a primary cell employing the following chemical reaction:

Zn + CuO ——– Cu + ZnO .