Electronics and Communication Engineering - Networks Analysis and Synthesis

16.
For a high pass filter attenuation = 0 at f = 0.
True
False
Answer: Option
Explanation:

Attenuation is infinite at f = 0 for high pass filter.


17.
Current having waveform in figure flows through 10 Ω resistance. Average power is
1000 W
500 W
333.3 W
250 W
Answer: Option
Explanation:

RMS current = = 5.773 A, P = I2R = 333.3 W.


18.
S is closed for a long time and steady state is reached. S is opened at t(0-). The voltage marked V is V0 at t = 0+ and Vf at t = ∞. Then value of V0 and Vf are respectively
8, 8
0, 1
4, 0
4, 8
Answer: Option
Explanation:

For Thevenin Equivalent Resistance, v = 0, I = 0

.


19.
Two voltages are v1= 100 sin (ωt + 15°) and v2 = 60 cosωt, then
v1 is leading v2 by 15°
v1 is leading v2 by 75°
v2 is leading v1 by 75°
v2 is lagging v1 by 15°
Answer: Option
Explanation:

v1 = 100 sin (ωt + 15°) and v2 = 60 cos ωt = 60 sin (ωt + 90°). Hence, v2 is leading v1 by (90 - 15) = 75°.


20.
If A = 16 ∠64°, (A)0.5 is
4∠64°
4∠8°
4∠128°
4∠32°
Answer: Option
Explanation: