1
GATE EE 2004
+2
-0.6
The input resistance $${R_{IN}}\left( { = {V_x}/{I_x}} \right)$$ of the circuit in the figure is
A
$$100\,\,k\Omega$$
B
$$- 100\,\,k\Omega$$
C
$$1\,\,M\Omega$$
D
$$- 1\,\,M\Omega$$
2
GATE EE 2004
+2
-0.6
In the Schmitt trigger circuit shown in figure, if $${V_{CE}}\left( {sat} \right) = 0.1V,$$ the output logic low level $$\left( {{V_{OL}}} \right)$$ is
A
$$1.25V$$
B
$$1.35V$$
C
$$2.5V$$
D
$$5.0V$$
3
GATE EE 2004
+2
-0.6
The transconductance $${g_m}$$ of the transistor shown in figure is $$10$$ $$mS.$$ The value of input resistance $${R_{in}}$$ is
A
$$10\,k\Omega$$
B
$$8.3\,k\Omega$$
C
$$5\,k\Omega$$
D
$$2.5\,k\Omega$$
4
GATE EE 2004
+1
-0.3
For a tachometer if $$\theta \left( t \right)$$ is the rotor displacement is radians, $$e\left( t \right)$$ is the output voltage and $${K_t}$$ is the tachometer constant in V/rad/sec, then the transfer function $${{E\left( s \right)} \over {\theta \left( s \right)}},$$ will be
A
$${K_t}{s^2}$$
B
$${{{K_t}} \over s}$$
C
$${{K_t}\,s}$$
D
$${K_t}$$
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