Q191 / 240 · KCET 2026 · Physics

Work function of the metal is

A
Maximum possible energy acquired by an electron
B
Equal for all metals
Correct answer
C
Minimum energy required by an electron to just eject from metal surface
D
Maximum energy which is given to electron to move out of metal surface

Solution

The work function of a metal is defined as the minimum amount of energy required by an electron to just escape from the metal surface.

It is a characteristic property of the metal and varies from one metal to another.

Answer: Minimum energy required by an electron to just eject from metal surface

Hence, the correct answer is option: 'C'.

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