Electronics and Communication Engineering - Networks Analysis and Synthesis

16.
In the circuit of figure the current through 3 Ω resistance at t = ∞ is
4 A
2.5 A
3.1 A
0
Answer: Option
Explanation:

Since capacitor is open circuited at t = ∞, current 20/8 A.


17.
In figure, i(0-) and v(0-) are zero. The switch is closed at t = 0, i(0+) and (∞) are
3 A and 1.5 A
1.5 A and zero
3 A and zero
1.5 A and 3 A
Answer: Option
Explanation:

At i = 0 applied voltage = 3V and current must be 3A. At i = ∞ source voltage is zero and current must be zero.


18.
Tellegen's theorem is applicable to
circuits with passive elements only
circuits with linear elements only
circuits with time invariant elements only
circuits with active or passive, linear or nonlinear and time invariant or time varying elements
Answer: Option
Explanation:
No answer description is available. Let's discuss.

19.
The Laplace transforms of voltage function shown in figure is
Answer: Option
Explanation:

The wave can be written as t u(t) - (t - a) u (t - a).


20.
Which of the statement is correct?
h and g matrices are inverse of each other
z and y matrices are inverse of each other
for reciprocal networks AD - BC = 1
ABCD parameters are used in transistor circuit
Answer: Option
Explanation:

Transistor circuits are analysed using h parameters.