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1

GATE EE 2005

MCQ (Single Correct Answer)
The common emitter amplifier shown in the figure is biased using a $$1mA$$ ideal current source. The approximate base current value is_____.
A
$$0\,\mu A$$
B
$$10\,\mu A$$
C
$$100\,\mu A$$
D
$$1000\,\mu A$$
2

GATE EE 2004

MCQ (Single Correct Answer)
The value of $$R$$ for which the $$PMOS$$ transistor in Figure. $$Q$$ $$63$$ will be biased in linear region is
A
$$220\,\Omega $$
B
$$470\,\Omega $$
C
$$680\,\Omega $$
D
$$1200\,\Omega $$
3

GATE EE 2003

MCQ (Single Correct Answer)
In the circuit shown, the current gain $$'\beta '$$ of the ideal transistor is $$10.$$ The operating point of the transistor $$\left( {{V_{CE}},{{\rm I}_C}} \right)$$ is
A
$$(40V, 4A)$$
B
$$(0V, 4A)$$
C
$$(40V, 5A)$$
D
$$(15V, 4A)$$
4

GATE EE 2003

MCQ (Single Correct Answer)
For the $$n$$-channel enhancement $$MOSFET$$ shown in figure,, the threshold voltage $${V_{th}}\,\, = \,\,2V.$$ The drain current $${I_D}$$ of the $$MOSFET$$ is $$4$$ $$mA$$ when the drain resistance $${R_D}$$ is $$1k\Omega .$$ If the value of $${R_D}$$ is increased to $$4\Omega ,$$ drain current $${I_D}$$ will become
A
$$2.8$$ mA
B
$$2.0$$ mA
C
$$1.4$$ mA
D
$$1.0$$ mA

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