Q97 / 120 · VITEEE 2018 · Physics

The V-I characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is : Figure

  • A
    10
  • Correct answer
    B
    $10^{-6}$
  • C
    $10^{6}$
  • D
    100

Solution

Forward bias resistance $=\frac{\Delta \mathrm{V}}{\Delta \mathrm{I}}=\frac{0.1}{10 \times 10^{-3}}=10 \Omega$ Reverse bias resistance $=\frac{10}{10^{-6}}=10^{7} \Omega$ Ratio of resistances $=\frac{\text { Forward bias resistance }}{\text { Reverse bias resistance }}=10^{-6}$

Hence, the correct answer is option: 'B'.

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