Question

For the given circuit shown in figure, the potential of the battery is varied from $10V$ to $16V$. If by zener diode breakdown voltage is $6V$, find maximum current through zener diode.

• A. $1.5mA$
• B. $3.5mA$
• C. $5mA$
• D. $6.5mA$

Answer 1

The correct option is B $3.5mA$

$i_i=\frac{6}{4}=1.5mA$
Maximum current will be obtained for battery voltage $16V$
$i=\frac{16-6}{2}=5mA{i}_z\left(max\right)=5-1.5=3.5mA$.