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  • In the circuit, if the forward voltage drop for the diode is , the current will be

In the circuit, if the forward voltage drop for the diode is \mathrm{0.5\ V}, the current will be

Option: 1

\mathrm{3.4\ mA}


Option: 2

\mathrm{2\ mA}


Option: 3

\mathrm{2.5\ mA}


Option: 4

\mathrm{3\ mA}


Answers (1)

best_answer

When diode is forward biased, then there is a small voltage drop across it
\mathrm{i=\frac{V-V^{\prime}}{R}} \\ \mathrm{Given, V=8 volt, V^{\prime}=0.5 volt,} \\ \begin{aligned} &\mathrm{ R=2.2 \mathrm{k} \Omega=2.2 \times 10^3 \Omega} \\ & \therefore=\frac{8-0.5}{2.2 \times 10^3}=\frac{7.5 \times 10^3}{2.2}=3.4 \times 10^{-3} \mathrm{~A} \\ & i=3.4 \mathrm{~mA} . \end{aligned}

Posted by

Gautam harsolia

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