Which cell has the longest life?

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ALP CBT 2 Electrician Previous Paper: Held on 23 Jan 2019 Shift 1
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  1. Mercury cell
  2. Lithium cell
  3. Carbon zinc cell
  4. Alkaline cell

Answer (Detailed Solution Below)

Option 2 : Lithium cell
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Detailed Solution

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 Cells:

  • Voltaic cell
  • Carbon-zinc cell (Leclanche cell and Dry cell)
  • Alkaline cell
  • Mercury cell
  • Silver oxide cell
  • Lithium cell

 

Two of the advantages of lithium cells over other primary cells are:

  • Longer shelf life - up to 10 years
  • Higher energy-to-weight ratios up to 350 WH/Kg
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