According to IUPAC convention, standard
reduction potentials are now called standard electrode potentials In a
galvanic cell, the half-cell in which oxidation takes place is called anode
and it has a negative potential with respect to the solution The other
half-cell in which reduction takes place is called cathode and it has a
positive potential with respect to the solution Thus, there exists a
potential difference between the two electrodes and as soon as the
switch is in the on position the electrons flow from negative electrode
to positive electrode