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Special Purpose Diodes question from JEE Main 2016

Q87JEE Main 2016Medium

Special Purpose Diodes

Identify the semiconductor devices whose characteristics are given below, in the order (a),(b),(c),(d)(a), (b), (c), (d):

Figure

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Answer: (a)

  1. (a): current rises only in forward bias, almost zero in reverse: simple diode.
  2. (b): sharp current rise at a fixed reverse voltage: Zener diode (breakdown).
  3. (c): curve shifts into the fourth quadrant on illumination: solar cell.
  4. (d): resistance falls as light intensity rises: light dependent resistance.
  5. So the answer is (a) simple diode, Zener diode, solar cell, LDR.
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