1
GATE ECE 2006
MCQ (Single Correct Answer)
+2
-0.6
An n-channel depletion MOSFET has following two points on its ID − VGS curve:
(i) VGS = 0 at ID = 12 mA and
(ii) VGS = - 6 Volts at ID = 0
Which of the following Q-points will give the highest trans-conductance gain for small signals?
A
VGS = -6 Volts
B
VGS = -3 Volts
C
VGS = 0 Volts
D
VGS = 3 Volts
2
GATE ECE 2006
MCQ (Single Correct Answer)
+1
-0.3
The concentration of minority carriers in an extrinsic semiconductor under equilibrium is:
A
directly proportional to the doping concentration
B
inversely proportional to the doping concentration
C
directly proportional to the intrinsic concentration
D
inversely proportional to the intrinsic concentration
3
GATE ECE 2006
MCQ (Single Correct Answer)
+1
-0.3
Under low level injection assumption, the injected minority carrier current for an extrinsic semiconductor is essentially the
A
diffusion current
B
drift current
C
recombination current
D
induced current
4
GATE ECE 2006
MCQ (Single Correct Answer)
+1
-0.3
Consider the function $$f(t)$$ having laplace transform
$$F\left( s \right) = {{{\omega _0}} \over {{s^2} + \omega _0^2}},\,\,{\mathop{\rm Re}\nolimits} \left( s \right) > 0.$$ The final value of $$f(t)$$ would be ____________.
A
$$0$$
B
$$1$$
C
$$ - 1 - f\left( \infty \right) \le 1$$
D
$$\infty $$
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