Question

What is the function of a carbon rod?

Answer 1

Hint: The carbon bar in a dry cell doesn't partake in the electrochemical responses that happen in a cell to create an electric flow. Nonetheless, the carbon bar just permits the progression of electrons. The carbon powder expands the electrical conductivity of the Manganese dioxide and holds the dampness of the electrolyte.

Complete answer:
A dry cell utilizes a glue electrolyte, with just enough dampness to permit current to stream. In contrast to a wet cell, a dry cell can work in any direction without spilling, as it contains no free fluid, making it appropriate for convenient gear. By correlation, the primary wet cells were regularly delicate glass compartments with lead bars swinging from the open top and required cautious taking care to stay away from spillage.
Lead–corrosive batteries didn't accomplish the security and movability of the dry cell until the advancement of the gel battery. Wet cells have kept on being utilized for high-channel applications, like turning over inward ignition motors, on the grounds that repressing the electrolyte stream will in general lessen the current capacity.
A zinc–carbon battery is a dry cell essential battery that gives direct electric flow from the electrochemical response among zinc and manganese dioxide. It delivers a voltage of about 1.5 volts between the zinc anode, which is regularly acknowledged as a holder for the battery, and a carbon bar of positive extremity, the cathode, that gathers the current from the manganese dioxide terminal, giving the cell its name.

Note:
A typical dry cell is the zinc-carbon cell, now and again called the dry Leclanché cell, with an ostensible voltage of 1.5 volts, equivalent to the soluble cell (since both utilize a similar zinc–manganese dioxide mix).