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. a series combination of R and C
B. a parallel combination of R and C
C. a series combination of R and parallel combination of R and C
D. a pure capacitor

Answer: Option C

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

A.
B.
C.
D.

Answer: Option B

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

A. 4/9
B. 4/3
C. 0
D.

Answer: Option A

Explanation:

= 4/9.


9. 

For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic impedance is

A. 100 Ω
B. 50 Ω
C. 25 Ω
D. 10 Ω

Answer: Option D

Explanation:

Z0 = Zoc Zsc .


10. 

The terms RMS and average values apply only to sine waves.

A. True
B. False

Answer: Option B

Explanation:

These terms are applicable to all waveshapes.