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In the above problem, if \mathrm{V_{B}=5V}, what should be the value of R to establish a current of 5mA in the current of −5mA in the circuit?

Option: 1

\mathrm{4.3 \mathrm{k} \Omega}


Option: 2

\mathrm{860 \mathrm{k} \Omega}


Option: 3

\mathrm{4.3 \Omega}


Option: 4

\mathrm{860 \Omega}


Answers (1)

best_answer

\mathrm{V_B=V_{\text {knee }}+I^{\prime} R^{\prime}}

Or \mathrm{\begin{aligned} & 5=0.7+5 \times 10^{-3} R^{\prime} \text { or } R^{\prime}=860 \Omega \\ & 5=0.7+10^{-3} R \text { or } R=4.3 K \Omega \end{aligned}}

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shivangi.shekhar

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