4 The constant A in the Richardson Dushman equation is 4 60

Last updated: 6/9/2023

4 The constant A in the Richardson Dushman equation is 4 60 10 Am K2 for tungsten A tungsten cathode has a total surface area of 20 x 10 m and operates at 2000 K The work function of tungsten is 4 55 eV Calculate the electric current due to thermionic emission