Exercise: Networks Analysis And Synthesis

Questions for: Networks Analysis And Synthesis

The current wave of figure, is passed through a 3 H inductor during the period 0 to 2 seconds
A:
is 3 V
B:
is 6 V
C:
increases from 0 at t = 0 to 6 V at t = 2 seconds
D:
increases from 0 at t = 0 to 6 V at t = 2 seconds and then decreases
Answer: B

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In figure, the short circuit current through terminal AB will be
A:
3 A
B:
1.5 A
C:
2 A
D:
1 A
Answer: A

No current will flow through 2ÎĐ resistance in parallel with short-circuit.

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In figure, the time constant for the capacitor charging is
A:
6 Ξs
B:
10 Ξs
C:
15 Ξs
D:
25 Ξs
Answer: A

Effective resistence is . Hence RC = 6 Ξs.

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The circuit shown in the figure has initial current iL(0) = 1A through the inductor and an initial voltage vc(0) = 1 V across the capacitor. For input v(t) = U(t) the Laplace transform of the current i(t) for t â‰Ĩ 0 is
A:
B:
C:
D:
Answer: B

Apply KVL

Vi(s) = I(s).R + Ls I(s) - Li(0+) +

Put the given values and .

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A T network is inserted between source and R as shown in figure. The resistance seen by the source remains the same with or without T network when R is
A:
5 ÎĐ
B:
10 ÎĐ
C:
15 ÎĐ
D:
20 ÎĐ
Answer: D

If R = 15 ÎĐ resistance, seen by the source = .

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