The amplification factor of a triode is $20.$ If the grid potential is reduced by $0.2$ volt then to keep the plate current constant its plate voltage is to be increased by
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The plate resistance of a triode is $2.5 \times 10^4 \Omega$ and mutual conductance is $2 \times 10^{-3} mho$. What will be the value of amplification factor
Two $P N$-junctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be
$P$-type semiconductor is formed whenA. As impurity is mixed in $S i$B. $A$ Impurity is mixed in $S i$C. $B$ impurity is mixed in $G e$D. $P$ impurity is mixed in $G e$
A $G e$ specimen is doped with $A l$. The concentration of acceptor atoms is $\sim 10^{-}$atoms $/ m$. Given that the intrinsic concentration of electron hole pairs is $\sim 10^{19} / m ^3$, the concentration of electrons in the specimen is
The figure represents variation of triode parameter ( $\mu$ or $r$ or $g$ ) with the plate current. The correct variation of $\mu$ and $r$ are given, respectively by the curves