1
GATE EE 2010
+2
-0.6
If the 12 Ω resistor draws a current of 1A as shown in the figure, the value of resistance R is
A
4
B
6
C
8
D
18
2
GATE EE 2010
+1
-0.3
The switch in the circuit has been closed for a long time. It is opened at t = 0. At t = 0+, the current through the 1μF capacitor is
A
0 A
B
1 A
C
1.25 A
D
5 A
3
GATE EE 2010
+2
-0.6
The two-port network P shown in the figure has ports 1 and 2, denoted by terminals (a, b) and (c, d), respectively. It has an impedance matrix Z with parameters denoted by zij. A 1 Ω resistor is connected in series with the network at port 1 as shown in the figure. The impedance matrix of the modified two-port network (shown as a dashed box) is
A
$$\begin{pmatrix}z_{11}+1&z_{12}+1\\z_{21}&z_{22}+1\end{pmatrix}$$
B
$$\begin{pmatrix}z_{11}+1&z_{12}\\z_{21}&z_{22}+1\end{pmatrix}$$
C
$$\begin{pmatrix}z_{11}+1&z_{12}\\z_{21}&z_{22}\end{pmatrix}$$
D
$$\begin{pmatrix}z_{11}+1&z_{12}\\z_{21}+1&z_{22}\end{pmatrix}$$
4
GATE EE 2010
+1
-0.3
An ammeter has a current range of $$0$$-$$5A,$$ and its internal resistance is $$0.2\Omega$$. In order to change the range to $$0$$-$$25$$ $$A$$ we need to add a resistance of
A
$$0.8\,\Omega$$ in series with the meter
B
$$1.0\,\Omega$$ in series with the meter.
C
$$0.04\,\Omega$$ in parallel with the meter
D
$$0.05\,\Omega$$ in parallel with the meter
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