Two electrodes in electrolyte solutions
The voltaic cell
A salt bridge
a salt bridge
Zn(s)/Zn2+(aq)//Au+(aq)/Au(s)
.. A redox reaction at two electrodes causes electrons to flow.
A voltaic battery is also known as a voltaic pile, which is a set (or pile) of galvanic cells linked together in series to create a larger voltage than could be generated by a single galvanic cell. Therefore a voltaic cell would simply be one element of the pile which is also one galvanic cell.
0.92V
The voltage of a galvanic cell is the difference between the half cell potentials for the two reactions. For silver and nickel, this is about 1 volt.
1.05 V
4.2 V
1.05 V
4.2 V
the gold electrode
0.92V
0.92V
4.2V
0.92 V. apex