Exercise: Networks Analysis And Synthesis

Questions for: Networks Analysis And Synthesis

For a sine wave the average value is calculated over half the cycle.
A:
True
B:
False
C:
D:
Answer: A

The average value over full cycle is zero.

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An ac voltage 20 sin 1000t feeds an R-C series circuit. R = 8 Ω and active power is 4 W. The power factor is
A:
1
B:
0.8
C:
0.6
D:
0.4
Answer: D

or or

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A planar graph has 6 nodes and 7 branches. The number of meshes in the dual graph is
A:
2
B:
3
C:
4
D:
6
Answer: A

In dual, node pairs and meshes are interchanged b = (n - 1) + l l = 2.

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The current through a 10 Ω resistance in a dc circuit having two emf sources is 3A. If this resistance is changed to 20 Ω, the new value of current will be
A:
less than 3 A
B:
equal or less than 3 A
C:
equal to or less or more than 3 A
D:
1.5 A
Answer: A

The current will be less than 3 A. It may not be 1.5 A because other resistance in the circuit also affect the value of current.

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In an RC series circuit excited by dc voltage E, the current at t = 0 is
A:
E/R
B:
E/C
C:
zero
D:
infinity
Answer: A

Since the capacitor does not have any charge initially,

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