Special Purpose Diodes
Identify the semiconductor devices whose characteristics are given below, in the order :
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Answer: (a)
- (a): current rises only in forward bias, almost zero in reverse: simple diode.
- (b): sharp current rise at a fixed reverse voltage: Zener diode (breakdown).
- (c): curve shifts into the fourth quadrant on illumination: solar cell.
- (d): resistance falls as light intensity rises: light dependent resistance.
- So the answer is (a) simple diode, Zener diode, solar cell, LDR.