Network Theory And Analysis MCQ Questions & Answers

61

Determine the current i₁ in the network.
Network Theory and Analysis mcq question image

A) 3.5 A B) 2 A C) 5.5 A D) 1.5 A

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Answer & Solution

Answer: Option C

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62

A delta-connected network with its Wye-equivalent is shown in the figure. The resistances R₁, R₂ and R₃ (in ohms) are respectively
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A) 1.5, 3 and 9 B) 3, 9 and 1.5 C) 9, 3 and 1.5 D) 3, 1.5 and 9

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Answer & Solution

Answer: Option D

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63

For a pair of lossless magnetically coupled coils with respective self inductances L₁, L₂ (with L₁ < L₂) and mutual inductance M, the following is generally true.

A) M < L₁ + L₂ B) M² < L₁L₂ C) M < min(L₁ + L₂) D) L₁ < M < L₂

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Answer & Solution

Answer: Option B

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64

The input voltage V₁ and current I₁ for linear passive network is given by V₁ = AV₂ - BI₂ and I₁ = CV₂ - DI₂
Now consider the following network:
Which one of the following is the transfer matrix \[\left[ {\begin{array}{*{20}{c}} {\text{A}}&{\text{B}} \\ {\text{C}}&{\text{D}} \end{array}} \right]\] of the network shown above?
Network Theory and Analysis mcq question image

A) \[\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&{10} \end{array}} \right]\] B) \[\left[ {\begin{array}{*{20}{c}} 1&{10} \\ 0&1 \end{array}} \right]\] C) \[\left[ {\begin{array}{*{20}{c}} 0&1 \\ {10}&0 \end{array}} \right]\] D) \[\left[ {\begin{array}{*{20}{c}} 0&{10} \\ 1&0 \end{array}} \right]\]

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Answer & Solution

Answer: Option B

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65

Consider the following properties of a particular network theorem:
1. The theorem is not concerned with type of elements.
2. The theorem is only based on the two Kirchhoff's laws.
3. The reference directions of the branch voltages and currents are arbitrary except that they have to satisfy Kirchhoff's laws.
Which one of the following theorems has the above characteristics?

A) Thevenin's theorem B) Norton's theorem C) Tellegen's theorem D) Superposition theorem

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Answer & Solution

Answer: Option C

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66

In the given circuit, the initial current i(0) = 20 Amp. Then the current in amperes at time t is:
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A) 10 e^-21 B) 12.5 e^t C) 20 e^-2t D) 40 e^-2t

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Answer & Solution

Answer: Option C

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67

Which of the following statements is false in case of a series circuit?

A) The voltage drop across each resistor is the same B) The current flowing through each resistor is the same C) Applied voltage is equal to the sum of the voltage drops across individual resistors D) Resistors are additive

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Answer & Solution

Answer: Option A

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68

In the circuit shown in the figure, i(t) is a unit step current. The steady-state value of v(t) is
Network Theory and Analysis mcq question image

A) 2.5 V B) 1 V C) 0.1 V D) zero

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Answer & Solution

Answer: Option C

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69

All poles and zeros of a driving point immittance function of an L-C network

A) should lie on the jω axis B) should lie on the +ve real axis C) should lie on the -ve real axis D) can lie anywhere in s-plane

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Answer & Solution

Answer: Option A

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70

For a series RLC circuit, the power factor at the lowest half power frequency is

A) 0.707 lagging B) 0.5 leading C) 1.0 D) 0.707 leading

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Answer & Solution

Answer: Option D

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Network Theory And Analysis MCQ Questions & Answers | ECE