Electronics and Communication Engineering - Networks Analysis and Synthesis

46.
Two impedances are connected in series. Three voltmeters are connected, one across each impedance and one across combination. The readings of all the three are equal. The phase angle between voltages across the two impedances is
30°
60°
90°
120°
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
In a series resonant circuit Q is more than 10. Then the lower half power frequency ω1, and resonant frequency ω0 are related as
ω1 = ω0 + bandwidth
ω1 = ω0 + 0.5 (bandwidth)
ω1 = ω0 - 0.5 (bandwidth)
ω1 = ω0 + bandwidth
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
In a series R-L circuit when excited by a 1 volt battery the current is 1 - e-t. If it is excited by a source 2 sin t, the current will be
2 sin (t - 45°) + e-t
2 sin (t + 45°) + e-t
sin (t - 45°) + e-t
sin (t + 45°) + e-t
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
If R, L, C are in parallel, the currents through L and C are equal in magnitude at resonance.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
In all pure metals, temperature coefficient of resistance is positive.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.