Question
The figure represents variation of triode parameter ($\pi$ or $r_p$ or gm) with the plate current. The correct variation of $\mu$and rp are given, respectively by the curves
✓
Answer
(c)$r_p$ varies with $i_p$ according to relation ${r_p} \propto i_p^{ - 1/3}$ i.e. when $i_p$ increases, $r_p$ decreases, hence graph $C $ represents the variation of $r_p$.
$\mu$ doesn't depends upon $i_p$, hence graph $A$ is correct.
$\mu$ doesn't depends upon $i_p$, hence graph $A$ is correct.
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