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What Causes the Setting up of High Electric Field Even for Small Reverse Bias Voltage Across the Diode?

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प्रश्न

What causes the setting up of high electric field even for small reverse bias voltage across the diode?

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उत्तर

Because of heavy doping, a very thin (<10−6 m) depletion region is formed between the p and n sides, and hence, the electric field of the junction is extremely high (~5 × 106 V/m) even for a small reverse bias voltage of about 5V.

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2014-2015 (March) Panchkula Set 3

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(a)

(b)
  1. Name the type of a diode whose characteristics are shown in figure (A) and figure (B).
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Consider a box with three terminals on top of it as shown in figure (a):


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Three components namely, two germanium diodes and one resistor are connected across these three terminals in some arrangement. A student performs an experiment in which any two of these three terminals are connected in the circuit shown in figure (b).


(b)

The student obtains graphs of current-voltage characteristics for unknown combination of components between the two terminals connected in the circuit. The graphs are

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(e)

(iv) When B is positive and C is negative


(f)

(v) When A is positive and C is negative


(g)

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