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AP EAMCET20224 Jul 2022Morning ShiftPhysicsDual Nature of MatterActual

The metal which has the highest work function in the following is

Options

  1. ACesium Cs
  2. BSodium Na
  3. CAluminium Al
  4. DPlatinum Pt

Correct answer

D. Platinum Pt

Step-by-step solution

Work function is the minimum energy required by an electron to escape from the metal surface. It depends on the properties of the metal and the nature of the surface. The work function is higest for Platinum with value of 5 . 65   eV and it is lowest for Cesium with value 2 . 14   eV .

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