Electronics and Communication Engineering - Networks Analysis and Synthesis

11.
The switch in figure is initially closed. At t = 0 the switch is opened. At t = 0+, the current through R is
I
0
Ie-t/RC
Answer: Option
Explanation:

At t = 0+ capacitor behaves as short-circuit.


12.
The ABCD parameters of ideal n : 1 transformer shown in the figure are . The value of X will be
n
1/n
n2
1/n2
Answer: Option
Explanation:

.


13.
If , the network has
1 H inductor and 1 F capacitor in parallel
1 H inductor and 1 F capacitor in series
1 H inductor and 1 Ω resistor in series
1 H inductor and 1 Ω resistor in parallel
Answer: Option
Explanation:

which means 1 H inductance and 1 F capacitor in parallel.


14.
The power dissipated in 4 Ω resistance in figure is
64 W
32 W
16 W
8 W
Answer: Option
Explanation:

Current through 4Ω resistance = 2 A.


15.
The total inductance of two coils is 60 mH in series aiding connection and 40 mH in series opposing connection. The mutual inductance between coils is
20 mH
10 mH
5 mH
2.5 mH
Answer: Option
Explanation: