Thermionic emission of electrons

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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Calculating the range of value for which cables will remain taut.

Determine the range of values of «P» for which both cables remain taut. Please see the attachment for a drawing of the solution.

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