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

  • Option 1)

     10

  • Option 2)

     10−6

  • Option 3)

     106

     

  • Option 4)

    100

 

Answers (1)

As we learnt in

Dynamic Resistance -

R_{d}= \frac{dv}{di}

- wherein

Since slope of potential vs current graph is non uniform hence resistance keep changing .

 

 Forward Resistance 

R_{F}=\frac{\Delta V}{\Delta i}=\frac{0.1}{10\times 10^{-3}}\Omega

Reverse bias Resistance =\frac{\Delta V}{\Delta i}=\frac{10}{10^{-6}}=10^{7}\Omega

Ratio of forward to reverse bias resistance =\frac{10}{10^{7}}=10^{-6}

Correct option is 2.


Option 1)

 10

This is an incorrect option.

Option 2)

 10−6

This is the correct option.

Option 3)

 106

 

This is an incorrect option.

Option 4)

100

This is an incorrect option.

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