# 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

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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