Ans : Dry Cell : A primary voltaic cell in which the electrolyte is a paste in known as a dry cell. A chemical reaction within the battery creates an electrical charge that flows from inside to an outer circuit that is connected to an electrical device.
Construction : Dry cell batteries, regardless of their size, typically have the same basic components. At the center of each is a rod called a cathode, which is often made of carbon & surrounded by an electrolyte paste. Different chemicals can be used to create this paste, such as ammonium chloride & manganese dioxide, depending on the type of battery. The cathode & electrolyte paste are wrapped in paper or cardboard & sealed into a metal cylinder called an anode, which is typically made of zinc.
Working : When zinc & graphite electrodes are connected by a metallic wire Zn gets oxidized to form Zn2+ ions which pass into the wet paste leaving behind electrons on the Zn container & the electrons move from Zn electrode to carbon electrode through the external circuit.