Question

Assuming that the silicon diode having resistance of $20\Omega$, the current through the diode is (knee voltage $0.7V$)

• A. $0mA$
• B. $10mA$
• C. $6.5mA$
• D. $13.5mA$

Answer 1

The correct option is C $6.5mA$

Here diode is forward biased with voltage $=2-0=2V$.
$V_B=V_{knee}+IR$
$2=0.7+I\times 200$
($\therefore$ Total resistance $=180+20=200\Omega$)
$\therefore I=\frac{1.3}{200}=6.5mA$