A) \[{{T}^{1/2}}\]
B) \[{{T}^{3/2}}\]
C) \[{{T}^{2}}\]
D) \[T\]
Correct Answer: C
Solution :
According to Richardsons equation, Thermoionic current\[I=AT\,{{_{e}^{2}}^{-b/T}}\] \[\therefore \] \[I\propto {{T}^{2}}\]
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