Question

In the voltage regulator circuit shown below, the maximum load current $I_L$ that can be drawn by the load when the zener diode is biased in breakdown region is equal to ___ mA.

(Assume the minimum current to turn on the diode is $I_{z\left(min\right)}=1mA)$

• A. 0.4

Answer 1

The correct option is A 0.4

$I_{in}=\frac{30-9}{15\times {10}^3}=1.4mA$

$I_{L\left(max\right)}=I_{in}-I_{z\left(min\right)}$

$=1.4-1$

$=0.4mA$