Resistance of a Cell.
The fluids in a cell do not conduct electricity as well as copper does; they offer more resistance and thus reduce the current output.
The internal resistance of a cell may be lowered by using large zinc plates curled around the porous pot.
The Samson cell has a large zinc plate bent in the form of a cylinder, the carbon-manganese combination standing in the centre of it.
The dry cell also has a large zinc, the internal resistance being thus much lowered, the current output is increased. This is by reason of Ohm’s law, which teaches that to increase the current flow, either the voltage of the battery must be increased, or the resistance decreased.
But increased current means lessened life; there is only just so much energy in a cell mainly dependent on the quantity of chemicals.