Electronics and Communication Engineering - Networks Analysis and Synthesis

6.
In the circuit of figure the switch is closed at t = 0, At t = 0+ this current through inductance is
0
10 A
6.67 A
5.1 A
Answer: Option
Explanation:

Current through an inductance cannot change instantaneously.


7.
In the circuit of figure, the source supplies, 2.25 mA. The value of R must be
5 Ω
3 Ω
1.5 Ω
0.5 Ω
Answer: Option
Explanation:

The current through 8 ohm and 2 ohm resistances is A or 1 mA.

Therefore, current through (5 + R) ohm is 1.25 mA.


8.
The sum of positive real functions
is a positive real function
may be a positive real function or not
can not be a positive real function
either (b) or (c)
Answer: Option
Explanation:

It is a property of positive real functions.


9.
Twelve 1 Ω resistance are used as edges to form a cube. The resistance between two diagonally opposite corners of the cube is
5/6 Ω
1 Ω
6/5 Ω
3/2 Ω
Answer: Option
Explanation:

.


10.
A parallel RLC circuit has ω0 = 106 and Q = 30, Given C = 30 pF, the value of R is
0
1 μΩ
2 MΩ
1 MΩ
Answer: Option
Explanation:

.