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VITEEE 2010 Solved Paper

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Question : 29

Total: 120

Silver has a work function of 4.7eV. When ultraviolet light of wavelength 100 nm is incident upon it, potential of 7.7 V is required to stop photoelectrons from reaching the collector plate. The potential required to stop electrons when light of wavelength 200 nm is incident upon silver is

1.5 V
1.85 V
1.95 V
2.37 V

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