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प्रश्न
Define stopping potential.
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उत्तर
The minimum negative potential given to the anode of a photo-cell for which the photoelectric current becomes zero is called stopping potential.
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संबंधित प्रश्न
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When a 6000 Å light falls on the cathode of a photo cell, photoemission takes place. If a potential of 0.8 V is required to stop emission of electron, then determine the
- frequency of the light
- energy of the incident photon
- work function of the cathode material
- threshold frequency and
- net energy of the electron after it leaves the surface.
