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JEE Main · 2013 · 07 Apr 2013 · Offline · Semiconductors

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The I-V characteristic of an LED is
  1. (A)(see structure)
  2. (B)(see structure)
  3. (C)(see structure)
  4. (D)(see structure)
    ✓ Correct

Answer: (D)

Solution

A light-emitting diode conducts when it is forward biased: below the knee voltage almost no current flows, and once the applied voltage passes that threshold the forward current, and with it the light output, rises sharply. The characteristic that captures this is the one holding the current near zero until the knee and then climbing steeply as the forward voltage increases.

JEE Main · 2013 · 07 Apr 2013 · Offline · Single correct option

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