Network Theory And Analysis MCQ Questions & Answers

31

A 230 V rms source supplies power to two loads connected in parallel. The first load draws 10 kW at 0.8 leading power factor and the second one draws 10 kVA at 0.8 lagging power factor. The complex power delivered by the source is

A) (18 + j1.5) kVA B) (18 - j1.5) kVA C) (20 + j1.5) kVA D) (20 - j1.5) kVA

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Answer & Solution

Answer: Option B

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32

The capacitance of each capacitor is C = 3 µF in the figure shown. The effective capacitance between points A and B is
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Network Theory and Analysis mcq question image

A) 2 µF B) 3 µF C) 4 µF D) 5 µF

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Answer & Solution

Answer: Option D

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33

Consider the following circuit:
What is the current I in the above circuit?
Network Theory and Analysis mcq question image

A) 0 A B) 2 A C) 5 A D) 6 A

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Answer & Solution

Answer: Option A

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34

Match List-I with List-II for the co-tree branches 1, 2, 3 and 8 of the graph shown in the given figure and select the correct answer using the options given below:

List-I	List-II
a. Twigs	1. 4, 5, 6, 7
b. Links	2. 1, 2, 3, 8
c. Fundamental cut-set	3. 1, 2, 3, 4
d. Fundamental loop	4. 6, 7, 8

A) a-1, b-2, c-3, d-4 B) a-3, b-2, c-1, d-4 C) a-1, b-4, c-3, d-2 D) a-3, b-4, c-1, d-2

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Answer & Solution

Answer: Option A

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35

A series R-L circuit {R = 4 Ω and L = 0.01 H} is excited by a voltage (in volt) v(t) = 283sin(300t + 90°). The current in the circuit will be

A) $$40\sin \left\{ {300t + {{53.1}^ \circ }} \right\}{\text{A}}$$ B) $$40\sin {53.1^ \circ }{\text{A}}$$ C) $$40\sqrt 2 \sin \left\{ {300t + {{53.1}^ \circ }} \right\}{\text{A}}$$ D) $$40\sqrt 2 \sin {53.1^ \circ }{\text{A}}$$

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Answer & Solution

Answer: Option C

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36

If a coil has diameter 'd', number of turns 'N' and form factor 'F' then the inductance of the coil is proportional to

A) \[{{\text{N}}^2}{\text{dF}}\] B) \[{\text{N}}{{\text{d}}^2}{\text{F}}\] C) \[\frac{{{{\text{N}}^2}{{\text{d}}^2}}}{{\text{F}}}\] D) \[\frac{{{{\text{N}}^2}{\text{d}}}}{{\text{F}}}\]

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Answer & Solution

Answer: Option C

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37

Superposition theorem can be applicable only to circuits having . . . . . . . . elements.

A) Non-linear B) Passive C) Resistive D) Linear bilateral

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Answer & Solution

Answer: Option D

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38

What is the open circuit impedance Z₁₁(s) of the network shown in the figure given below?
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A) $$10 + 2{\text{s}}$$ B) $$\left( {10 - \frac{4}{{\text{s}}}} \right)$$ C) $$\left( {10 + \frac{4}{{\text{s}}}} \right)$$ D) $$10 - 2{\text{s}}$$

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Answer & Solution

Answer: Option C

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39

In the circuit shown in the given figure, C₁ = C₂ = 2F and the capacitor C₁ has a voltage of 20 V when S is open
If the switch S is closed at t = 0, the voltage V_C₂ will be a
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A) fixed voltage of 20 V B) fixed voltage of 10 V C) fixed voltage of -10 V D) sinusoidal voltage

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Answer & Solution

Answer: Option D

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40

Thevenin's and Norton equivalents cannot be developed in circuits containing

A) DC independent sources B) AC independent sources C) Independent and dependent sources D) None of these

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Answer & Solution

Answer: Option D

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Network Theory And Analysis MCQ Questions & Answers | ECE