The output current versus time curve of a rectifier is shown in the figure. The average value of the output current in this case is
A$0$
B$i / \pi$
C$2 i / \pi$
D$i_0$
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C$2 i / \pi$
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The amplification factor of a triode valve is $15.$ If the grid voltage is changed by $0.3$ volt the change in plate voltage in order to keep the plate current constant (in volt) is
$P$-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 $G e$
For a triode, at $V_g=-1$ volt, the following observations were taken $V_p=75 V , I_p=2 mA , V_p=100 V , I_p=4 mA$. The value of plate resistance will be