Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement

Subject: Network Theory 1

**Part 1: List for questions and answers of Network Theory**

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**Q1. In any linear network, the elements like inductor, resistor and capacitor ****always_________**

**a) Exhibit changes due to change in temperature**

**b) Exhibit changes due to change in voltage**

**c) Exhibit changes due to change in time**

**d) Remains constant irrespective of change in temperature, voltage and time**

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**Q12. which type of networks allow the physical separability of the network elements ****(resistors, inductors & capacitors) for analysis purpose?**

**a) Lumped Networks**

**b) Distributed Networks**

**c) Unilateral Networks**

**d) Bilateral Networks**

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**Q3. Which law plays a significant role in the loop analysis of the network?**

**a) KCL**

**b) KVL**

**c) Law of Superposition Theorem**

**d) None of the above**

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**Q4. How is the loop analysis different in application/functioning level as compared to ****Kirchoff’s law?**

**a) Utilization of loop currents instead of branch currents for writing equations**

**b) Capability of branch current to carry multiple networks**

**c) Reduction in the number of unknowns for complex networks**

**d) All of the above**

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**Q5. Which theorem assists in replacement of an impedance branch over the network by the ****other network comprising different circuit components, without affecting the V-I relations ****throughout the entire network?**

**a) Superposition Theorem**

**b) Compensation Theorem**

**c) Substitution Theorem**

**d) Maximum Power Transfer Theorem **

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**Q6. What should be done, if the dependent current and voltage sources are present in a ****circuit while applying ‘Superposition Theorem’?**

**a) Replace them by open circuit**

**b) Replaced them by short circuit**

**c) Keep in their original form without replacing by either open or short circuits**

**d) None of the above**

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**Q7. What will be the value of a rectangular (complete incidence) matrix, if an associated ****branch is oriented towards the node?**

**a) 1**

**b) -1**

**c) 0**

**d) Not defined (8)**

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**Q8. According to the linear graph theory, the number of possible trees is always equal to the ****determinant of product of ______**

**a) Only complete incidence matrix**

**b) Reduced incidence matrix & its transpose**

**c) Cut-Set matrix**

**d) Tie-set matrix**

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**Q9. How much number of minimum end nodes or terminal nodes are involved in a tree, ****according to its properties?**

**a) Only one**

**b) Two**

**c) Four**

**d) Infinite**

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**Q10. If a differential equation is said to be homogeneous, what would be the value of a ****forcing function?**

**a) 0**

**b) 1**

**c) 8**

**d) -1**

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**Q11. Which notation of instant implies that the unchanged condition of network is about to ****change?**

**a) t(0)+**

**b) t(0)-**

**c) t***

**d) tˆ **

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**Q12. Which elements behave as an open circuit especially under the consideration of d.c. ****quantities?**

**a) Inductors**

**b) Resistors**

**c) Capacitors**

**d) All of the above**

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**Q13. What would be the value of power factor for series RLC circuit under the resonance ****phenomenon?**

**a) 0**

**b) 0.5**

**c) 1**

**d) Infinity**

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**Q14. Which among the following get/s cancelled under the resonance condition in a.c. ****circuits, if inductive and capacitive reactance’s are in parallel?**

**a) Reactance**

**b) Susceptance**

**c) Resistance**

**d) All of the above**

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**Q15. Which among the following condition is true at the resonance?**

**a) Xc is greater than XL**

**b) Xc = XL**

**c) Xc is less than XL**

**d) None of the above**

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**Q16. Reactance curve is basically a graph of individual reactance’s verses __________**

**a) Frequency**

**b) Phase**

**c) Amplitude**

**d) Time period**

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**Q17. Which type of impedance in asymmetrical network is estimated at a single pair of ****network terminals especially in the chain of infinite networks?**

**a) Image impedance**

**b) Iterative impedance**

**c) Characteristic impedance**

**d) All of the above **

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**Q18. Where do the ‘correctly terminated asymmetrical networks’ show termination at both ****the ports of network?**

**a) In image impedances**

**b) In iterative impedances**

**c) In characteristic impedances**

**d) All of the above**

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**Q19. Which unit is used for the measurement of an insertion loss?**

**a) Neper**

**b) Weber**

**c) Ohm**

**d) Watt**

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**Q20. How is an insertion loss represented in terms of power ratio?**

**a) a = 10 log10 | P1 / P2 | decibel**

**b) a = 10 log10 | P2 / P1 | decibel**

**c) a = 20 log10 | P1 / P2 | decibel**

**d) a = 20 log10 | P2 / P1 | decibel **

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**Part 1: List for questions and answers of Network Theory**

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**Q1. Answer: d**

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**Q2. Answer: a**

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**Q3. Answer: b**

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**Q4. Answer: d**

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**Q5. Answer: c**

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**Q6. Answer: c**

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**Q7. Answer: b**

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**Q8. Answer: b**

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**Q9. Answer: b**

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**Q10. Answer: a**

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**Q11. Answer: b**

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**Q12. Answer: c**

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**Q13. Answer: c**

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**Q14. Answer: b**

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**Q15. Answer: b**

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**Q16. Answer: a**

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**Q17. Answer: b**

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**Q18. Answer: a**

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**Q19. Answer: a**

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**Q20. Answer: a**