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GATE ECE 2004 | Question: 42

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The drain of an $n$-channel MOSFET is shorted to the gate so that $V_{G S}=V_{D s}$. The threshold voltage $\left(V_{T}\right)$ of MOSFET is $1 \mathrm{~V}$. If the drain current $\left(\mathrm{I}_{\mathrm{D}}\right)$ is $1 \mathrm{~mA}$ for $\mathrm{V}_{G S}=2 \mathrm{~V}$, then for $\mathrm{V}_{G \mathrm{~s}}=3 \mathrm{~V}, \mathrm{I}_{\mathrm{D}}$ is

  1. $2 \mathrm{~mA}$
  2. $3 \mathrm{~mA}$
  3. $9 \mathrm{~mA}$
  4. $4 \mathrm{~mA}$

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