Exercise: Networks Analysis And Synthesis

Questions for: Networks Analysis And Synthesis

A wave trap is a
A:
series tuned circuit
B:
a parallel tuned circuit
C:
either a series tuned circuit or parallel tuned circuit
D:
none of the above
Answer: B

It has R and L in one branch and a variable capacitance in second branch.

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In figure, which value of ZL will cause maximum power to be transferred to the load?
A:
2 + j2 Ω
B:
2 - j2 Ω
C:
- 2 Ω
D:
2 Ω
Answer: D

As seen from ZL, the circuit impedance =

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In figure, capacitor is used to develop pulses of short duration and large duty cycle across R2 when switch is closed. Which of the following combinations is best suited?
A:
R1 and R2 large but C small
B:
R1 and R2 small but C large
C:
R1 and C large and R2 small
D:
R2 and C large but R1 small
Answer: C

Large values of R1 and C mean large time of charging C and hence large duty cycle. Small value of R2 ensures that duration of pulses is small.

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A current 10 sin (200t) A flows through a 5 mH inductance. The expression for voltage is
A:
10 sin (200t + 90°)
B:
10 sin (200t - 90°)
C:
10 sin(1000t + 90°)
D:
10 sin (1000t - 90°)
Answer: D

Z = jXL = jωL = = 1∠90° and V = IXL

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In figure, i(t) is a unit step current. The steady state value of v(t) is
A:
2 V
B:
3 V
C:
6 V
D:
9 V
Answer: A

In steady state inductance is short-circuited and capacitance is open circuited. Current through 6Ω resistance = and

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