Calcuate `n(T)//n (1000 K)` for tungsten emitter at `T = 300 K, 2000 K and 3000 K` where `n(T)` represent the number of thermions emitted per secodn by the surface at temperature. `T`. Work function of tungsten is `4.52 eV`.

K represents the rate constant of a reaction when log K is plotted against 1//T (T= temperature) the graph obtained is a

If the temperature of a tungsten filament is raised from 2000 K to 2010 K , by what factor does the emission current change? Work function of tungsten is 4.5 eV .

If the temperature of a tungsten filament is raised from 2000 K to 2010 K , by what factor does the emission current change? Work function of tungsten is 4.5 eV .

The saturation current from a thoriated-tungsten cathode at 2000 K is 100 mA . What will be the saturation current for a pure-tungsten cathode of the same surface area operating at the same temperature? The constant A in the Richardson-Dushman equation is 60 xx 10^4 A m^(-2) K^(-2) for pure tungsten and 3.0 xx 10^(4) A m^(-2) K^(-2) for thoriated tungsten. The work function of pure tungsten is 4.5 eV and that of thoriated tungsten is 2.6 eV .

The saturation current from a thoriated-tungsten cathode at 2000 K is 100 mA . What will be the saturation current for a pure-tungsten cathode of the same surface area operating at the same temperature? The constant A in the Richardson-Dushman equation is 60 xx 10^4 A m^(-2) K^(-2) for pure tungsten and 3.0 xx 10^(4) A m^(-2) K^(-2) for thoriated tungsten. The work function of pure tungsten is 4.5 eV and that of thoriated tungsten is 2.6 eV .

Find the number of selections of six letters from the letters of the word 'K A R N A T A K A'

The thermal radiation emitted by a body is proportional to T^(n) where T is its absolute temperature. The value of n is exactly 4 for

The thermal radiation emitted by a body is proportional to T^(n) where T is its absolute temperature. The value of n is exactly 4 for