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The 6V Zener diode shown has zener resistance and a knee current of 5mA. The minimum value of R so that the voltage does not drop below 6V is?

The 6V Zener diode shown has zener resistance and a knee current of 5mA. The minimum value of R so that the voltage does not drop below 6V is? Correct Answer 80 Ω

Here, Vz =6V, IZMIN=5mA.IS=IZMIN+ILMAX. 80=5+ILMAX . ILMAX=75Ma.RLMIN=VI/ILMAX=6/75mA =80 Ω.

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