Work Function Definition
Mediumphysics
Work function φ of metal is?
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Solution
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Minimum energy to remove surface electron
- Definition: The work function is the minimum amount of energy required for an electron to escape from the surface of a metal against the attractive forces of the ions.
- Physical Basis: Electrons are held within the metal by a potential barrier at the surface.
- Dependencies: The value depends on the nature of the metal and its surface condition (e.g., Cesium has a lower ϕ than Platinum).
- Measured in: Typically expressed in electron-volts (eV).
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About This Question
- Subject
- physics
- Chapter
- dual nature
- Topic
- work function definition
- Difficulty
- Medium
- Year
- 2025
This medium difficulty physics question is from the chapter dual nature, covering the topic of work function definition. It appeared in the 2025 exam. Practice this and similar questions to strengthen your understanding of dual nature concepts.
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