The V-I characteristic of a silicon diode is shown in figure. The resistance of the diode at ID = 15 mA is

Question

The V-I characteristic of a silicon diode is shown in figure. The resistance of the diode at ID = 15 mA is <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/cf37e8c4470731b56bd52603bf090dde-.png" /> (A) 5 Ω (B) 10 Ω (C) 2 Ω (D) 20 Ω

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<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/bce2bb25ca1f64153b1259b65ceffbc9-.png" /> In diagram, At I = 20 mA, V = 0.8 V and At I = 10 mA, V = 0.7 V rfb = (Δ V/Δ I) = (0.1 V/10 mA) = 10Ω

Q. The $V - I$ characteristic of a silicon diode is shown in figure. The resistance of the diode at $I_{D} = 15 m A$ is

$5 Ω$

$10 Ω$

$2 Ω$

$20 Ω$

In diagram, At $I = 20 m A, V = 0.8 V$ and
At $I = 10 m A, V = 0.7 V$
$r_{f b} = \frac{Δ V}{Δ I} = \frac{0.1 V}{10 m A}$
$= 10Ω$

Q. The V−I characteristic of a silicon diode is shown in figure. The resistance of the diode at ID​=15mA is

5Ω

10Ω

2Ω

20Ω