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GATE ECE 1992 | Question-15

An $n$-channel $\text{JFET}$ has a pinch-off voltage of $\mathrm{V}_{p}=-5 \mathrm{~V}, \mathrm{~V}_{\mathrm{DS}}(\max )=20 \mathrm{~V}$, and $\delta_{m}=2 \mathrm{~mA} / \mathrm{V}$. The minimum ' $\mathrm{ON}^{\prime}$ ' resistance is achieved in the $\text{JEFT}$ for

  1. $\mathrm{V}_{\mathrm{CS}}=-7 \mathrm{~V}$ and $\mathrm{V}_{\mathrm{DS}}=0 \mathrm{~V}$
  2. $\mathrm{V}_{\mathrm{CS}}=7 \mathrm{~V}$ and $\mathrm{V}_{\mathrm{DS}}=0 \mathrm{~V}$
  3. $\mathrm{V}_{\mathrm{CS}}=0 \mathrm{~V}$ and $\mathrm{V}_{\mathrm{DS}}=20 \mathrm{~V}$
  4. $\mathrm{V}_{\mathrm{CS}}=-7 \mathrm{~V}$ and $\mathrm{V}_{\mathrm{DS}}=20 \mathrm{~V}$

     

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