Question

The reading of the ammeter for a silicon diode in the given circuit is :

• A. $13.5\text{mA}$
• B. $0$
• C. $15\text{mA}$
• D. $11.5\text{mA}$

Answer 1

The correct option is D $11.5\text{mA}$

Potential barrier due to a silicon diode in the given condition $=0.7\text{V}$
$\therefore$ In this forward biased diode
$i=\frac{v}{R}=\frac{3-0.7}{200}=\frac{2.3}{200}=0.0115\text{A}$
$=11.5\text{mA}$