The amplification produced by a triode is due to the action of

The amplification factor of a triode is $20$,the trans-conductance is $3 \text{ mS}$ (milli mho),and the load resistance is $3 \times 10^4 \ \Omega$. Calculate the voltage gain.

For a given plate-voltage,the plate current in a triode is maximum when the potential of

The figure represents the variation of triode parameters ($\mu$, $r_p$, or $g_m$) with the plate current. The correct variations of $\mu$ and $r_p$ are given, respectively, by the curves:

The voltage gain of a triode depends upon

The relation between dynamic plate resistance $(r_p)$ of a vacuum diode and plate current $(I_p)$ in the space charge limited region is: