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50 TOP Network Network Theorems Theorems - Electri Electrical cal Engineering Multi Multiple ple choice choice Questions Questions and and Answers Answers | MCQs preparation for Engi Engi neeri neering ng Competitiv Competitive e Ex Exams ams
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Home » Network Theorems Quiz Questions and Answers » Home » Answers » 50 TOP Network Theorems - Electrical Engineering Multiple choice Questions and Answers
50 TOP Network Theorems - Electrical Engineering Multiple choice Questions and Answers Latest Network Theorems Questions and Answers List 1. Ki Kirchhoff rchhoff s current law stat es that (a) net current flow at the junction is positive (b) Hebraic sum of the currents meeting at the junction is zero (c) no current can leave the junction without some current entering it. (d) total sum of currents meeting at the junction is zero Ans: b
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2. According to Kirchhoffs voltage law, the algebraic sum of all IR drops and e.m.fs. in any closed loop of a network is always (a) negative (b) positive (c) determined by battery e.m.fs. (d) zero Ans: d 3. Kirchhoffs current law is applicable to only (a) junct jun ct ion in a network (b) closed loops in a network (c) electric c ir ircuits cuits (d) electronic electronic circuits Ans: a
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4. Kirchhoffs voltage law is related to (a) junction currents (b) battery e.m.fs. (c ) IR drops (d) both (b) and (c) (e) none of the above Ans: d
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5. Superposition theorem can be applied only to circuits having (a) resistive e lem lements ents (b) passive e lem lements ents (c) non-linear elements elements (d) linear bilate ral elements
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50 TOP Network Network Theorems Theorems - Electri Electrical cal Engineering Multi Multiple ple choice choice Questions Questions and and Answers Answers | MCQs preparation for Engi Engi neeri neering ng Competitiv Competitive e Ex Exams ams Ans: d 6. The concept on which Superposition theorem is based is (a) reciprocity (b) duality (c) non-linearity (d) linearity Ans: d
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7. Thevenin resistance Rth is found (a) by removing voltage sources along with their internal resistances (6) by short-c ircuiting the given two termi terminals nals (c) between any two 'open' terminals (d) between same open terminals as for Etk Ans: d
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8. An ideal voltage source should have (a) large value of e.m.f. (b) small value of e.m.f. (c) zero source resistance (d) infinite source resistance Ans: c
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9. For a voltage source (a) terminal voltage is always lower than source e.m.f. (b) terminal voltage cannot be higher than source e.m.f. (c) the source e.m.f. and terminal voltage are equal Ans: b 10. To determine the polarity of the voltage drop across a resistor, it is necessary to know (a) value of current through the resistor (b) direction of current through the resistor (c) value of resistor (d) e.m.fs. in the circuit Ans: b 11. "Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load". The above statement is associated with (a) Millman's Millm an's the orem (b) Thevenin's theorem (c) Superposition theorem (d) Maximum power transfer theorem Ans: d
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12. "Any number of current sources in parallel may be replaced by a single current source whose current is the algebraic sum of individual source currents and source resistance is the parallel combination of individual source resistances". The above stat em ement ent is associated with (a) Thevenin's theorem (b) Millman's theorem (c) Maximum power transfer theorem (d) None of the above Ans: b 13. "In any linear bilateral network, if a source of e.m.f. E in any branch produces a current I in any other branch, then same e.m.f. acting in the second branch would produce the same current / in the first branch". The above stat em ement ent is associated with (a) compensation theorem (b) superposition theorem (c) reciprocity theorem (d) none of the above Ans: c 14. Which of the following is non-linear circuit parameter ? (a) Inductance (b) Condenser (c) Wire wound resistor (d) Transistor Ans: a 15. A capacitor is generally a (a) bilateral and active component (b) ac tive, pas sive, linear and nonlinear nonlinear component (c) lin linear ear and bilateral c omp omponent onent (d) non-linear and active component Ans: c 16. "In "In any net work containing more more than one sources of e.m.f. t he c urr urrent ent in any branch is t he algebraic sum of a number of individual fictitious currents (the number being equal to the number of sources of e.m.f.), each of which is due to separate action of each source of e.m.f., taken in order, when the remaining sources of e.m.f. are replaced by conductors, the resistances of which are equal to the internal resistances of the respective sources".
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50 TOP Network Network Theorems Theorems - Electri Electrical cal Engineering Multi Multiple ple choice choice Questions Questions and and Answers Answers | MCQs preparation for Engi Engi neeri neering ng Competitiv Competitive e Ex Exams ams The above stat em ement ent is associated with (a) Thevenin's theorem (b) Norton's theorem (c) Superposition theorem (d) None of the above Ans: c 17. Kirchhoff s law is applicable to (a) passive networks only (b) a.c. circuits only (c) d.c. circuits only only (d) both a.c. as well d.c. c ir ircuits cuits Ans: d 18. Kirchhoff s law is not applicable to circuits with (a) lumped parameters (b) passive e lem lements ents (c) distributed parameters parameters (d) non-linear resistances Ans: c 19. Kirchhoff s voltage law applies to circuits with (a) nonlinear elements only (b) linear elements only (c) linear, non-linear, active and passive elements (d) linear, non-linear, non-linear, ac tive, passive, t im ime e varying as we lls as t im ime-in-va e-in-va rian riantt elem elements ents Ans: d 20. The resistance LM will be (a) 6.66 Q (b) 12 Q (c) 18Q (d) 20Q Ans: a 21. For high efficiency of transfer of power, internal resistance of the source should be (a) equal to the load resistance (b) less than the load resistance (c) more than the load resistance (d) none of the above Ans: b 22. Efficiency of powe r transfer when maxim maximum um transfer of power c xerosi xerosis s (a) 100% (b) 80% (c) 75% (d) 50% Ans: d 23. If resistance across LM in Fig. 2.30 is 15 ohms, the value of R is (a) 10 Q (6) 20 Q (c) 30 Q (d) 40 Q Ans: c 24. For maxim maximum um transfer transfer of power, internal resistance of t he source should be (a) equal to load resistance (b) less than the load resistance (c) greater than the load resistance (d) none of the above Ans: a 25. If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be (a) a voltage source (b) a current source (c) both of above (d) none of the above Ans: a 26. The circuit whose properties are same in either direction is known as (a) unilateral unil ateral circuit (b) bilateral circuit (c) irr irreversible eversible circuit (d) reversible circuit Ans: b
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27. In a series parallel circuit, any two resistances in the same current path must be in (a) series with each other (b) parallel with each other (c) series with the voltage source.'
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50 TOP Netw Network ork Theorem Theorems s - Electrical Electrical Engi Engi neering neering M ultiple ultiple choice choice Question Questions s and Answ Answers ers | MCQs preparatio preparation n for Engineering Engineering Competiti Competiti ve Exams Exams (d) parallel with the voltage source Ans: a 28. The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as (a) non-linear circuit (b) linear circuit (c) bilateral circuit (d) none of the above Ans: a 29. A non-linear network does not satisfy (a) superposition condition (b) homogeneity homogeneity c ondition (c) both homogeneity as well as superposition condition (d) homogeneity, hom ogeneity, superposition and assoc iative condition Ans: c 30. An ideal voltage source has (a) zero internal resistance (b) open circuit voltage equal to the voltage on full load (c) terminal term inal voltage in proportion to current (d) terminal terminal voltage in proportion proportion t o load Ans: a
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31. A network which contains one or more than one source of e.m.f. is known as (a) linear network (b) non-linear network (c) passive network (d) active network Ans: c
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32. The superposition theorem is applicable to (a) linear, non-linea r and time variant response s (b) linear lin ear and non-linear resistors only (c) lin linear ear responses only (d) none of the above Ans: c
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33. Which of the f ollowing is not a nonli nonlinear near element element ? (a) Gas diode (b) Heater coil (c) Tunnel diode (d) Electric arc Ans: 34. Application of Norton's theorem to a circuit yields (a) equivalentt current equivalen current source and im impedance pedance in in series (6) equivalentt current equivalen current source source and im impedance pedance in parall parallel el (c) equivalent impedance (d) equivalent current source Ans: a 35. Millman's theorem yields (a) equivalentt resistance equivalen (6) equivalentt im equivalen impedance pedance (c) equivalent voltage source (d) equivalent voltage or current source Ans: d
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36. The superposition theorem is applicable to (a) voltage only (b) current "onl "only y (c) both current and voltage (d) current voltage and power Ans: d
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37. Between the branch voltages of a loop the Kirchhoff s voltage law imposes (a) non-linear const raints (b) linear lin ear const rain raints ts (c) no c onstrai onstraints nts (d) none of the above Ans: b
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38. A passive network is one which contains (a) only variable resistances (b) only some sources of e.m.f. in it (c) only two sources of e.m.f. in it (d) no source of e.m.f. in it Ans: d 39. A terminal where three on more branches meet is known as
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40. Which of the following is the passive element ? (a) Capacitance (b) Ideal current source (c) Ideal voltage source (d) All of the above Ans: a 41. Which of the following is a bilateral element ? (a) Constant current source (b) Constant voltage source (c) Capacitance (d) None of the above Ans: c 42. A closed path made by several branches of the network is known as (a) branch (b) loop (c) c ir ircuit cuit (d) junction Ans: b 43. A linear resistor having 0 < R < °o is a (a) current cont roll rolled ed resistor (6) voltage cont roll rolled ed resistor (c) both current controlled and voltage controlled resistor (d) none of the above Ans: c 44. A star circuit has element of resistance R/2. The equivalent delta elements will be (a) R/6 (b) fi? (c) 2R (d) 4R Ans: b 45. A delta circuit has each element of value R/2. The equivalent elements of star circuit with be (a) RIG (b) R/3 (c) 2R (d) 3R Ans: a 46. In Thevenin's theorem, theorem, t o find Z (a) all independent current sources are short circuited and independent voltage sources are open circuited (b) all independent voltage sources are open circuited and all independent current sources are short circuited (c) all independent voltage and current sources are short circuited (d) all independent voltage sources are short circuited and all independent current sources are open circuited Ans: d 47. While calc ulating Rth in Thevenin's theorem and Norton equivalent (a) all independen independentt sources are made dead (b) only current sources are made dead (c) only voltage sources are made dead (d) all voltage and current sources are made dead Ans: a 48. The number number of independent independent equations to solve a network is equal to (a) the num number ber of chords (b) the num number ber of branches (c) sum of the number of branches and chords (d) sum of number number of branches, chords and nodes Ans: a 49. The superposition theorem requires as many circuits to be solved as there are (a) sources, nodes and meshes (b) sources and nodes (c) sources (d) nodes Ans: c 50. Choose the incorrect statement. (a) A branch branch formed formed by the parallel parallel connection of any resistor R and open circuit has the characte ristic of an open circuit. (b) A branch branch formed formed by the parallel parallel connection of any resistor R and a short circuit has the charact eristic of a short circuit. (c) A branch formed by the series connection of any resistor R and an open circuit has the characteristic of an open circuit.
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50 TOP Network Network Theorems Theorems - Electri Electrical cal Engineering Multi Multiple ple choice choice Questions Questions and and Answers Answers | MCQs preparation for Engi Engi neeri neering ng Competitiv Competitive e Ex Exams ams (d) A branch formed by the series connection of any resistor R and a short circuit has the characteristic of resistor R. Ans: a
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