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Identify the diode for which the above symbol is used.
- a)Varactor diode
- b)Light emitting diode
- c)Photo diode
- d)Blocking diode
Correct answer is option 'B'. Can you explain this answer?
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Identify the diode for which the above symbol is used.a)Varactor diode...
PN Junction Diode:
- A unilateral device is a device that conducts only in one direction.
- p-n junction diodes conduct only when the p region is connected to a higher voltage and the n region is connected to lower voltage.
- When reverse biased, it acts as an open circuit.
- The symbol for a diode is as shown:
Zener diodes
- Zener diodes are normal PN junction diodes operating in reverse-biased conditions.
- The working of the Zener diode is similar to a PN junction diode in the forward biased condition, but the uniqueness lies in the fact that it can also conduct when it is connected in reverse bias above its threshold/breakdown voltage.
- Zener diodes also called avalanche diodes or Breakdown diodes are the heavily doped P – N junction diodes
- It is operated in a breakdown region.
The symbolic representation of the Zener diode is as shown:
Photo-diode:
- It is a light-sensing device that is used to sense the intensity of light
- Some of the examples are the smoke detector, a receiver in tv for converting remote signals, etc.
The symbolic representation of the Photodiode is as shown:
A light-emitting diode (LED):
- The device which is used to produce the different intensities of light and different colors depending upon the types of mater used in making it is called LED.
The symbolic representation of the LED is as shown:
Varactor diode:
- It is represented by a symbol of diode terminated in the variable capacitor as shown below:
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Identify the diode for which the above symbol is used.a)Varactor diodeb)Light emitting diodec)Photo dioded)Blocking diodeCorrect answer is option 'B'. Can you explain this answer?
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