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    Thermionic emission of electrons

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    Find the value of the thermionic current in Amp/cm<sup>2</sup> for a platinum filament whose work function is 4.1 eV and temperature is 2000 K. The emission constant A is 120 A/(cm<sup>2</sup> K<sup>2</sup>).

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    Solution Summary

    Given the value of emission constant, the solution shows how to calculate the thermionic current. The current through a platinum filament with a specific work function is found.