The text{I-V} characteristic of a text{P-N} j | vedclass

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(B) The forward resistance $(R_F)$ of a $	ext{P-N}$ junction is given by the ratio of the change in voltage $(\Delta V)$ to the change in current $(\

Vedclass · Accepted Answer

$0.25$

Vedclass · Answer

(B) The forward resistance $(R_F)$ of a $	ext{P-N}$ junction is given by the ratio of the change in voltage $(\Delta V)$ to the change in current $(\Delta I)$.From the given graph,we select two points on the curve:Point $1$: $V_1 = 2.0 	ext{ V}$,$I_1 = 400 	ext{ mA} = 0.4 	ext{ A}$Point $2$: $V_2 = 2.1 	ext{ V}$,$I_2 = 800 	ext{ mA} = 0.8 	ext{ A}$Change in voltage,$\Delta V = V_2 - V_1 = 2.1 	ext{ V} - 2.0 	ext{ V} = 0.1 	ext{ V}$Change in current,$\Delta I = I_2 - I_1 = 0.8 	ext{ A} - 0.4 	ext{ A} = 0.4 	ext{ A}$Therefore,the forward resistance is:$R_F = \frac{\Delta V}{\Delta I} = \frac{0.1 	ext{ V}}{0.4 	ext{ A}} = 0.25 \Omega$

The $\text{I-V}$ characteristic of a $\text{P-N}$ junction in forward bias is shown. The approximate forward resistance of the junction is $-$ (in $\Omega$)

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