Question

Positive terminal inside a dry cell is made of:
1. Zinc rod
2. Aluminium rod
3. Brass rod
4. Carbon rod

Answer 1

Correct Answer - Option 4 : Carbon rod

The correct answer is Carbon-rode.

• Dry Cell
  • A dry cell is a device that generates electricity based on chemical reactions.
  • When the two electrodes of the cell are connected via a closed path, then the cell forces the electrons to flow from one end to the other.
  • The flow of electrons causes the current to flow in a closed circuit.
  • It was developed in 1886 by the German scientist Carl Gassner after the development of wet zinc-carbon batteries by Georges Leclanche in 1866. 
  • This traditional dry cell consists of a carbon-rod cathode (positive terminal) immersed in a moist paste of MnIVO2, ZnIICl2, NH4Cl, and powdered carbon, which is contained in a metallic zinc-rod anode (negative terminal). 
  • A dry cell uses a paste electrolyte, with only enough moisture to allow current to flow. Unlike a wet cell, a dry cell can operate in any orientation without spilling, as it contains no free liquid, making it suitable for portable equipment.