Electronics and Communication Engineering - Networks Analysis and Synthesis

11.
The drift velocity of electrons is
very small as compared to speed of light
equal to speed of light
almost equal to speed of light
half the speed of light
Answer: Option
Explanation:

Drift velocity of electrons is very small.


12.
Wave A = 100 sin ωt and wave B = 100 cos ωt. Then
rms values of the two waves are equal
rms values of A is more than that of B
rms values of A is less than that of B
rms values of the two waves may or may not be equal
Answer: Option
Explanation:

Since peak values are equal, their rms values are equal irrespective of phase difference.


13.
Z(c) for the network shown in the figure is The value of C and R are, respectively
1/6 F and 4 Ω
2/9 F and 9/2 Ω
2/3 F and 1/2 Ω
1/2 F and 1 Ω
Answer: Option
Explanation:
No answer description is available. Let's discuss.

14.
In an R-C series circuit excited by a voltage E, the charge across capacitor at t = 0+ is
0
CE
CE (1 - e-t/RC)
none of the above
Answer: Option
Explanation:

Voltage across a capacitor cannot change instantaneously.


15.
Two networks are cascaded through an ideal buffer. If td1 and td2 are delay times of network, the overall delay time is
td1 + td2
t2d1 + t2d2
td1 + td2
Answer: Option
Explanation:

In cascaded networks delay times are added.