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GATE ECE 1992 | Question-21

The $6 \mathrm{~V}$ Zener diode shown in given figure has zero Zener resistance and a knee current of $5 \mathrm{~mA}$. The minimum value of $R$ so that the voltage across it does not fall below $6 \mathrm{~V}$ is

  1. $1.2 \mathrm{~K}$ ohms
  2. $80$ ohms
  3. $50 \mathrm{ohms}$
  4. $0$ ohms

     

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