80 + Interview Questions in Techniques Of Circuit Analysis in Electric Circuits Page 2 InterviewSolution

51.	Determine the voltage V2 of the network given.(a) 0V(b) 1V(c) 4/7V(d) -4/7VThis question was posed to me at a job interview.This interesting question is from The Node-Voltage Method Versus the Mesh-Current Method in portion Techniques of Circuit Analysis of Electric Circuits
Answer» Right answer is (a) 0V Easy explanation: As there are voltage sources and nodes, node-voltage METHOD is best suitable. Solving GIVES V1 =4/7V and V2=0 (since there is no voltage SOURCE near node2).

Discussion

52.	Find the power supplied by the dependent voltage source in the circuit given below.(a) 400W(b) 383W(c) 412W(d) 148WThe question was asked by my school principal while I was bunking the class.The question is from The Node-Voltage Method Versus the Mesh-Current Method in portion Techniques of Circuit Analysis of Electric Circuits
Answer» Correct choice is (b) 383W For EXPLANATION I would SAY: 3loops=3KVL equations. SOLVING them gives currents flowing in the circuit. I1=5A, I2=-1.47A, I3=0.56A .Power SUPPLIED by dependent voltage source =0.4V1 (I1-I2).

Discussion

53.	Determine the current through 5Ω resistor in the network given below.(a) 3.38A(b) 6.01A(c) 3.27A(d) 1.27AThis question was addressed to me in exam.Enquiry is from The Node-Voltage Method Versus the Mesh-Current Method topic in portion Techniques of Circuit Analysis of Electric Circuits
Answer» The correct option is (a) 3.38A The EXPLANATION: This problem can be solved quickly by using the mesh-current method. 3loops=3 KVL equations. Solving them gives RESPECTIVE CURRENTS.

Discussion

54.	When there is a current source between two loops which method is preferred?(a) Mesh-voltage analysis(b) Node-current analysis(c) Supermesh(d) SupernodeI have been asked this question during an internship interview.The query is from The Node-Voltage Method Versus the Mesh-Current Method topic in division Techniques of Circuit Analysis of Electric Circuits
Answer» Right CHOICE is (C) Supermesh The explanation: Supermesh is taken into consideration when there is a current source n between TWO LOOPS and is considered as one single LOOP.

Discussion

55.	Which method is best for voltage sources?(a) Mesh analysis(b) Nodal analysis(c) Superposition principle(d) Differentiation methodThis question was addressed to me during an interview.Query is from The Node-Voltage Method Versus the Mesh-Current Method topic in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» RIGHT option is (b) Nodal analysis Easy explanation: Every voltage source connected to the reference node reduces the EQUATIONS to be SOLVED. Thus, the node-voltage method is BEST for voltage SOURCES.

Discussion

56.	Mesh analysis is best suitable for _____________(a) Current sources(b) Voltage sources(c) Complex elements(d) Unilateral elementsI got this question in examination.This interesting question is from The Mesh-Current Method and Dependent Sources and Some Special Cases in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» The CORRECT choice is (a) CURRENT sources Explanation: Mesh analysis is best SUITABLE for Current sources.

Discussion

57.	Determine the current through 3Ω resistor in the network given below.(a) 2A(b) 3A(c) 4A(d) -2AThe question was asked in an interview for internship.The doubt is from The Mesh-Current Method and Dependent Sources and Some Special Cases topic in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» Correct CHOICE is (c) 4A The best explanation: Mesh1 and Mesh2 form a super mesh. ASSUMING currents I1 and I2 and applying KVL, the CURRENT through required resistor is FOUND out.

Discussion

58.	If there are 16 branches and 5 essential nodes, how many equations are required to describe a circuit in mesh-current method?(a) 12(b) 16(c) 21(d) 9I got this question by my college professor while I was bunking the class.My question is based upon The Mesh-Current Method and Dependent Sources and Some Special Cases in section Techniques of Circuit Analysis of Electric Circuits
Answer» The correct OPTION is (a) 12 The BEST explanation: In Mesh-Current method, b-(n-1) equations are REQUIRED to describe the circuit. b=the NUMBER of branches and n= the number of essential nodes.

Discussion

59.	If 4 equations are required to describe a circuit by Mesh-Current method and there are n nodes. How many branches are there in the network?(a) n+5(b) n+3(c) n(d) n-1I have been asked this question in class test.The query is from The Mesh-Current Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits
Answer» The CORRECT choice is (B) n+3 Explanation: STANDARD FORMULAE: b-(n-1) Given b-(n-1) =4 -> b=4+ (n-1) =n+3.

Discussion

60.	A Supermesh is formed between two loops which share a common voltage source.(a) True(b) FalseThis question was posed to me by my school teacher while I was bunking the class.The question is from The Mesh-Current Method and Dependent Sources and Some Special Cases topic in division Techniques of Circuit Analysis of Electric Circuits
Answer» Correct choice is (b) False The EXPLANATION: Meshes that share a CURRENT source with other meshes, none of which CONTAINS a current source in the outer loop, forms a supermesh.

Discussion

61.	Find the value of VX in the circuit given below.(a) –0.8A(b) +0.8A(c) -4.8A(d) +4.8AThe question was posed to me by my school teacher while I was bunking the class.Enquiry is from The Mesh-Current Method and Dependent Sources and Some Special Cases in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» The correct option is (a) –0.8A The EXPLANATION: APPLYING KVL, currents COULD be found out. I1=0.4A, I2=2.4A.VX=-I1R1.

Discussion

62.	The Mesh-Current method is applicable only for ___________(a) Non-linear networks(b) Equivalent networks(c) Non-planar networks(d) Planar networksThe question was posed to me in an international level competition.The doubt is from The Mesh-Current Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits
Answer» The CORRECT answer is (d) Planar networks The explanation: The Mesh-Current METHOD is applicable only for Planar networks. A NETWORK is SAID to be planar if there are no crossovers in it and it can be drawn freely on a plane surface.

Discussion

63.	Find the power delivered by the voltage source in the network given below.(a) 65Watts(b) 72Watts(c) 63Watts(d) 76WattsThe question was asked in an international level competition.I'm obligated to ask this question of The Mesh-Current Method and Dependent Sources and Some Special Cases topic in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» The correct option is (C) 63Watts Best explanation: 3 loops and a supermesh between loop1 and loop3. Using KVL CURRENTS are FOUND out. I1=9A, I2=2.5A, I3=2A. As voltage source is in 1st loop, Power DELIVERED by voltage source=V*I1.

Discussion

64.	Calculate the current flowing through 10Ω resistor in the circuit shown below.(a) ±0.435A(b) ±0.985A(c) 1.217A(d) 2.782AThe question was asked during an online exam.This interesting question is from The Mesh-Current Method and Dependent Sources and Some Special Cases topic in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» The correct answer is (a) ±0.435A Best explanation: LOOP2 and loop3 forms a supermesh. Supermesh: I3-I2=4 Loop1: 11I1-10I2=2 KVL at Supermesh: -2I1+3I2+3I3=0 Solving these GIVES the currents FLOWING in the circuit and CURRENT through 10Ω resistor is EITHER I1-I2 or I2-I1.

Discussion

65.	A Super Mesh analysis could be done when there is a common _____________ between any two loops.(a) Voltage source(b) Current source(c) Resistor(d) Both voltage and current sourceThis question was addressed to me during an internship interview.Question is taken from The Mesh-Current Method and Dependent Sources and Some Special Cases topic in division Techniques of Circuit Analysis of Electric Circuits
Answer» Right answer is (b) Current SOURCE For EXPLANATION I WOULD say: A Super MESH analysis COULD be done when there is a common current source between any two loops.

Discussion

66.	Find the current flowing through 5Ω resistor in the given circuit.(a) 0.57A(b) 0.64A(c) 0.78A(d) 0.89AThis question was addressed to me by my college professor while I was bunking the class.The origin of the question is The Mesh-Current Method and Dependent Sources and Some Special Cases in section Techniques of Circuit Analysis of Electric Circuits
Answer» The correct option is (c) 0.78A The explanation is: There are 3 meshes in the given CIRCUIT. Assuming currents I1, I2, I3 in the 3 meshes and by applying KVL, equations will be obtained which on solving gives the respective currents FLOWING in the circuits.

Discussion

67.	If there are 6 branches and 4 essential nodes, how many equations are required to describe a circuit in mesh-current method?(a) 3(b) 6(c) 4(d) 2I had been asked this question in an interview for internship.Query is from The Mesh-Current Method and Dependent Sources and Some Special Cases in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» Right OPTION is (a) 3 The best explanation: In Mesh-Current METHOD, b-(n-1) EQUATIONS are required to describe the circuit. b= the NUMBER of branches and n= the number of essential nodes.

Discussion

68.	The loop which does not contain any other inner loop is known as _____________(a) A node(b) A mesh(c) A branch(d) A super meshThe question was posed to me during an interview for a job.Asked question is from The Mesh-Current Method and Dependent Sources and Some Special Cases topic in division Techniques of Circuit Analysis of Electric Circuits
Answer» Right CHOICE is (b) A mesh To explain: A mesh is DEFINED as a LOOP which does not CONTAIN any other loop within it.

Discussion

69.	There are 13 branches in a complicated network and nearly 8 nodes. How many equations are required to solve the circuit in node-voltage method?(a) 7(b) 13(c) 5(d) 6This question was addressed to me in class test.My enquiry is from The Node-Voltage Method and Dependent Sources and Some Special Cases topic in section Techniques of Circuit Analysis of Electric Circuits
Answer» Right option is (a) 7 Easy explanation: Branches NUMBER is not required in this METHOD. Only nodes number is required.

Discussion

70.	If there are 9 nodes, then how many node-voltage equations are required?(a) 9(b) 10(c) 8(d) 1The question was asked in an internship interview.My enquiry is from The Node-Voltage Method and Dependent Sources and Some Special Cases in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» Correct answer is (C) 8 Easy EXPLANATION: If there are n NODES then n-1 nodal equations are REQUIRED to describe the CIRCUIT.

Discussion

71.	The reference node is also known as __________(a) Essential node(b) Principle node(c) Datum node(d) Neutral nodeI got this question during an online interview.The question is from The Node-Voltage Method and Dependent Sources and Some Special Cases in portion Techniques of Circuit Analysis of Electric Circuits
Answer» Right CHOICE is (c) DATUM node To explain I would SAY: The node taken for REFERENCE in the NETWORK is known as reference node or datum node.

Discussion

72.	If there are (N-2+3) Node-Voltage equations then the number of nodes in the circuit are __________(a) N+2(b) N+1(c) N(d) N-1The question was posed to me in an international level competition.This intriguing question comes from The Node-Voltage Method and Dependent Sources and Some Special Cases topic in section Techniques of Circuit Analysis of Electric Circuits
Answer» Correct ANSWER is (a) N+2 To explain I would say: If there are n nodes then n-1 nodal equations are REQUIRED to DESCRIBE the circuit. So, GIVEN N-2+3 i.e. N+1 nodal equations and it implies N+2 nodes.

Discussion

73.	If there are 5 nodes then the no of nodal equations are ___________(a) 5(b) 0(c) 1(d) 4The question was asked during an internship interview.Asked question is from The Node-Voltage Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits
Answer» RIGHT OPTION is (d) 4 To ELABORATE: If there are n NODES then n-1 nodal equations are required to DESCRIBE the circuit.

Discussion

74.	What is the voltage at 2nd terminal in the given circuit?(a) 132.57V(b) 137.25V(c) 173.25V(d) 123.57VI have been asked this question in semester exam.The origin of the question is The Node-Voltage Method and Dependent Sources and Some Special Cases in portion Techniques of Circuit Analysis of Electric Circuits
Answer» CORRECT answer is (b) 137.25V For explanation I would say: Given VOLTAGE source 135V is in between essential NODE and reference node. So that implies V1 =135V. Using this, V2 can be CALCULATED.

Discussion

75.	Find all the node voltages in the given circuit containing dependent sources.(a) 10V, 20V, 30V, 40V(b) 15V, 25V, 32V, 45V(c) 10V, -20V, 30V, -40V(d) -15V, 25V, -35V, 45VI got this question in a job interview.My question is taken from The Node-Voltage Method and Dependent Sources and Some Special Cases topic in division Techniques of Circuit Analysis of Electric Circuits
Answer» RIGHT option is (a) 10V, 20V, 30V, 40V The BEST I can explain: At supernode: VC-VB=5iX And ix = (VB-VA)/5. On SOLVING REMAINING nodes and forming EQUATIONS, the required voltage values at nodes are obtained.

Discussion

76.	Find V3 in the circuit given below.(a) 4.833V(b) 2.616V(c) -4.833V(d) -2.616VI have been asked this question in exam.Question is taken from The Node-Voltage Method and Dependent Sources and Some Special Cases in portion Techniques of Circuit Analysis of Electric Circuits
Answer» RIGHT option is (a) 4.833V For explanation: supernode: V3-V2 = 5V Node1: 166V1-100V2-66V3 =132 Node3: -166V1+265V2+99V3 =0 On solving the required VOLTAGE is OBTAINED.

Discussion

77.	A supernode is between _____________(a) Essential node and reference node(b) Two reference nodes(c) Two essential nodes(d) Essential node and neutral pathI got this question during an internship interview.My query is from The Node-Voltage Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits
Answer» The correct OPTION is (C) TWO essential nodes Easy explanation: A supernode is between two essential nodes.

Discussion

78.	Find VA and VB using Node-Voltage method in the given circuit.(a) 2.5V, 3.6V(b) 2.87V, 3.25V(c) 2.65V, 3.47V(d) 3.15V, 2.76VI got this question during an interview for a job.The origin of the question is The Node-Voltage Method and Dependent Sources and Some Special Cases topic in chapter Techniques of Circuit Analysis of Electric Circuits
Answer» Correct option is (b) 2.87V, 3.25V To explain: Node A:VA/2 + (VA-1)/2 + (VA-VB)/1 =2 Node B:(VB-2)/2 + (VB-VA)/1 =1 By SOLVING the above equations required VOLTAGES are obtained.

Discussion

79.	If there are n nodes, then how many node-voltage equations are required?(a) n(b) n+1(c) n-1(d) 1The question was asked in my homework.My query is from The Node-Voltage Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits
Answer» Right ANSWER is (c) n-1 The best explanation: If there are n nodes then n-1 NODAL EQUATIONS are required to describe the CIRCUIT.

Discussion

80.	Nodal analysis is mainly based on __________(a) KCL(b) KVL(c) Wheatstone bridge principle(d) Faraday’s electric lawsI have been asked this question during an interview for a job.This key question is from The Node-Voltage Method and Dependent Sources and Some Special Cases topic in division Techniques of Circuit Analysis of Electric Circuits
Answer» Right OPTION is (a) KCL Explanation: NODAL analysis or Node-Voltage METHOD is DONE by identifying the currents at the node and thereby FORMING equations.

Discussion

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Determine the voltage V2 of the network given.(a) 0V(b) 1V(c) 4/7V(d) -4/7VThis question was posed to me at a job interview.This interesting question is from The Node-Voltage Method Versus the Mesh-Current Method in portion Techniques of Circuit Analysis of Electric Circuits

Determine the current through 5Ω resistor in the network given below.(a) 3.38A(b) 6.01A(c) 3.27A(d) 1.27AThis question was addressed to me in exam.Enquiry is from The Node-Voltage Method Versus the Mesh-Current Method topic in portion Techniques of Circuit Analysis of Electric Circuits

If there are 9 nodes, then how many node-voltage equations are required?(a) 9(b) 10(c) 8(d) 1The question was asked in an internship interview.My enquiry is from The Node-Voltage Method and Dependent Sources and Some Special Cases in chapter Techniques of Circuit Analysis of Electric Circuits

If there are 5 nodes then the no of nodal equations are ___________(a) 5(b) 0(c) 1(d) 4The question was asked during an internship interview.Asked question is from The Node-Voltage Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits

Find V3 in the circuit given below.(a) 4.833V(b) 2.616V(c) -4.833V(d) -2.616VI have been asked this question in exam.Question is taken from The Node-Voltage Method and Dependent Sources and Some Special Cases in portion Techniques of Circuit Analysis of Electric Circuits

If there are n nodes, then how many node-voltage equations are required?(a) n(b) n+1(c) n-1(d) 1The question was asked in my homework.My query is from The Node-Voltage Method and Dependent Sources and Some Special Cases in division Techniques of Circuit Analysis of Electric Circuits