PhysicsElectric cellsWAEC
A new Leclanché cell is said to have a long shelf life. Which part of a simple voltaic cell, by contrast, is eaten away even when no current is drawn?
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Answer: B. the impure zinc plate
Impurities in the zinc form tiny local cells that dissolve the zinc even on open circuit (local action).
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.