question_answer

The slope of plate characteristic and mutual characteristic curves of a triode valve is \[0.02\text{ }mA\text{/}V\] and \[1\text{ }mA\text{/}V\]. The amplification factor of triode valve is :

A)  \[2\times {{10}^{8}}\]                  

B)         20                         

C)  50                         

D)         40