For the identical silicon diodes (assuming r_f to be zero), the value of \(\rm I_{D_2}\) in figure is:

Concept:

At forward bias condition → Diode should be replaced with a battery source of value equal to its barrier potential(for silicon 0.7 V)circuit and the equivalent forward resistance rf.

At reverse bias condition → Diode should be replaced with an open circuit.

Calculation:

For the given circuit arrangement;

Diodes are forward-biased;

As the diodes are identical half of the total source current will flow through each diode.

Then;

\(I_{S} = \frac{10-0.7}{0.330 }=28.18 \, mA\)

∴ \(I_{D2}=28.18/2 = 14.09\, mA\)