Electronics and Communication Engineering - Networks Analysis and Synthesis

6.
When a current source I is suddenly connected across a two terminal relaxed RC circuit at time t = 0, the voltage across the current source is shown in figure. The RC circuit is
a series combination of R and C
a parallel combination of R and C
a series combination of R and parallel combination of R and C
a pure capacitor
Answer: Option
Explanation:

Initially capacitor behaves as short-circuit and finally as open circuit.


7.
The driving-point impedance Z(s) of a network has a pole-zero locations as shown in the figure. If Z(0) = 3, then Z (s) is
Answer: Option
Explanation:

From figure, The impedance function

and Z(0) = while in question Z(0) = 3

= 3 k = 2.


8.
and i(t) is a unit step, then V(t) in the steady state is given by
4/9
4/3
0
Answer: Option
Explanation:

= 4/9.


9.
For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic impedance is
100 Ω
50 Ω
25 Ω
10 Ω
Answer: Option
Explanation:

Z0 = Zoc Zsc .


10.
The terms RMS and average values apply only to sine waves.
True
False
Answer: Option
Explanation:

These terms are applicable to all waveshapes.