Which element from following is used in photoelectric cells?

Which element from following is used in photoelectric cells?
  1. Li
  2. Be
  3. Cs
  4. Mg

Solution

Cesium (Cs) is the element used in photoelectric cells: Explanation: Cesium is the preferred metal for photoelectric cells because it can easily convert sunlight into electricity. It has a low ionization energy and is the most electropositive element. The amount of energy required to eject electrons from a cesium surface is relatively small, only 206.5 kJ/mol.

Asked in: MHT CET 2024 (02 May Shift 1)

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