For n-JFET, the channel is a/an __________ channel and gates are __________.

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SSC JE Electrical 16 Nov 2022 Shift 3 Official Paper
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  1. N type; P type
  2. P type; P type
  3. N type; N type
  4. P type; N type

Answer (Detailed Solution Below)

Option 1 : N type; P type
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The correct answer is option 1):(N type; P type)

Concept:

  • The schematic of an n-channel JFET along with its circuit symbol is shown in Figure
  • The n-channel JFET has its major portion made of n-type semiconductors.
  • The mutually-opposite two faces of this bulk material are from the source and the drain terminals.
  • There are two relatively-small p-regions embedded into this substrate which are internally joined together to form the gate terminal
  • Thu the source and the drain terminals are of n-type while the gate is of p-type.
  • For n-JFET, the channel is a N-type channel and gates are P type
  • Due to this, two pn junctions will be formed within the device, whose analysis reveals the mode in which the JFET works

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