Question:
The circuit contains two diodes each with a forward resistance of $50 \Omega$ and with infinite reverse resistance. If the battery voltage is $6 \mathrm{~V}$, the current through the $120 \Omega$ resistance is______ $\mathrm{mA}$
Solution:
$(\mathbf{2 0})$
$\mathrm{D}_{2}$ is reverse bias so current does not flow through $\mathrm{D}_{2}$
$\mathrm{D}_{1}$ is forward bias.
$I=\frac{6}{300} \quad \Rightarrow 0.02 \mathrm{~A}$
$=20 \mathrm{~mA}$
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