Work function of a metal is the:

Energy required by an electron to get absorbed in the metal surface.

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Minimum energy required by an electron to escape from the metal surface.

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Energy required by an electron to be retained in the metal surface.

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Maximum energy required by an electron to escape from the metal surface.

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Solution

The correct option is A Minimum energy required by an electron to escape from the metal surface.
Work function of a metal is the minimum amount of energy required by an electron to escape from metal surface .

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