A) 6.25 V
B) 0.16 V
C) 15.2 V
D) None of these
Correct Answer: A
Solution :
The first data gives value of plate resistance \[{{r}_{p}}=\frac{\Delta {{V}_{p}}}{\Delta {{i}_{p}}}=\frac{10}{0.8\times {{10}^{-3}}}=\frac{{{10}^{5}}}{8}\Omega \] Also \[{{g}_{m}}=\frac{\Delta {{i}_{p}}}{\Delta {{V}_{g}}}\] and \[{{g}_{m}}=\frac{\mu }{{{r}_{p}}}\] Þ \[\Delta {{V}_{g}}=\frac{\Delta {{i}_{p}}\times {{r}_{p}}}{\mu }=\frac{4\times {{10}^{-3}}\times {{10}^{5}}/8}{8}=6.25\,V\]
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