Physics Question on Semiconductor electronics: materials, devices and simple circuits

Question

The amplification factor of a triode is $50$ . If the grid potential is decreased by $0.20\, V$ . What increase,in plate potential will keep the plate current unchanged?

Answer 1

Solution

$\mu=\frac{\Delta V_{p}}{\Delta V_{g}}$
$\Rightarrow \Delta V_{p}=-\mu \times \Delta V_{S}$
$= -50(-20)=10\, V$