Shown below is a graph of current versus applied voltage for a diode. Approximately, what is the resistance of the diode for an applied voltage of −1 V ?

Question

Shown below is a graph of current versus applied voltage for a diode. Approximately, what is the resistance of the diode for an applied voltage of −1 V ? <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/p-fpxexjmvqikr.png" /> (A) 2 Ω  (B) ∞ (C) Zero (D) 1 Ω

Tardigrade Admin · Accepted Answer

The graph of current versus applied voltage for diode <img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/p-fpxexjmviwy4.png" /> In this case, at â1 V , current in the circuit is zero. Hence, according to Ohm's law, R=(V/I)=-(1/0)=∞

Q. Shown below is a graph of current versus applied voltage for a diode. Approximately, what is the resistance of the diode for an applied voltage of $- 1 V$ ?

$2 Ω$

$\infty$

Zero

$1 Ω$

The graph of current versus applied voltage for diode

In this case, at $- 1 V$ , current in the circuit is zero.
Hence, according to Ohm's law,
$R = \frac{V}{I} = - \frac{1}{0} = \infty$

Q. Shown below is a graph of current versus applied voltage for a diode. Approximately, what is the resistance of the diode for an applied voltage of −1V ?

2Ω

∞