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In the given transistor circuit, the base current 35\mu A. the value of R_{b} is

Option: 1

100 \mathrm{k} \Omega


Option: 2

\mathrm{ 200 \mathrm{k} \Omega}


Option: 3

300 \mathrm{k} \Omega


Option: 4

400 \mathrm{k} \Omega


Answers (1)

best_answer

Given that,

\mathrm{\mathrm{I_L}=35 \mu \mathrm{A}=85 \times 10^{-6} \mathrm{~A}}

and voltage in the circuit = 7 volt
We know that resistance offered by the junction in forward bias is zero.
Since, the base emitter junction is forward biased therefore junction resistance is almost zero. We also know that the base resistance

\mathrm{\begin{aligned} & R_b=\frac{V}{I}=\frac{7}{35 \times 10^{-6}} \\ & R_b=200 \mathrm{k} \Omega \end{aligned}}

Posted by

rishi.raj

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