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Consider a vo...

Question

Consider a voltage reference source created using zener diode as shown in the figure below :

Assume that the zener breakdown voltage is $V_{z} = 6.8 V$ . The value of current flowing in zener diode is equal to __________mA.

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Solution

Assume zener diode to be OFF.

Therefore voltage across zener diode is equal to
$V_{z} = \frac{1 \times 10^{3}}{1 \times 10^{3} + 5.6 \times 10^{3}} \times 10 = \frac{1}{6.6} \times 10 = 1.51 V < V_{z}$

Thus the zener diode will not conduct.

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