Electronics and Communication Engineering - Networks Analysis and Synthesis

36.
An RC driving point impedance function has zeros at s = - 2 and s = - 5. The admissible poles are
s = 0 and s = -6
s = -1 and s = -3
s = 0 and s = -1
s = -3 and s = -4
Answer: Option
Explanation:

In RC functions poles and zeros are interlaced.


37.
A triangular Pulse of 10 V peak is applied to a capacitor of 0.4 F. The change of the capacitor and its waveform is
8 rectangular
8 triangular
4 triangular
4 rectangular
Answer: Option
Explanation:

q = cv 0.4 x 10 4, triangular pulse.


38.
A 10 μF capacitor is charged from a 5 volt source through a resistance of 10 kΩ. The charging current offer 35 m sec. If the initial voltage on C is - 3 V is
0.56 mA
5.6 mA
6 mA
5 μA
Answer: Option
Explanation:

Initial current immediately after charging =

i = i0e-t/RC 0.8 mA x

0.8 x 10-3 0.56 mA.


39.
If an admittance Y(s) has a term Ks, the realization would give
an inductance of value K
a resistance of value K
a capacitance of value K
either (a) or(c)
Answer: Option
Explanation:

Admittance of a capacitance K is Ks.


40.
If the diameter of a wire is doubled, the current carrying capacity of the wire becomes
half
twice
four times
one-fourth
Answer: Option
Explanation:

Since diameter is doubled, area of cross-section becomes four times. Current carrying capacity is proportional to area of cross-section.