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1.

What is the other name for Dependent sources?(a) Uncontrolled sources(b) Time response elements(c) Steady state elements(d) Controlled sourcesThe question was asked in a national level competition.My question is taken from Analysis of a Circuit Containing Dependent Sources topic in section Circuit Variables and Elements of Electric Circuits

Answer» RIGHT answer is (d) Controlled sources

Easy explanation: Dependant sources are also known as Controlled sources as there are controlled by other ELEMENTS present in the CIRCUIT.
Discussion
2.

The analysis of a circuit containing dependent sources can be done using nodal and mesh analysis.(a) True(b) FalseThe question was asked in final exam.My doubt stems from Analysis of a Circuit Containing Dependent Sources topic in section Circuit Variables and Elements of Electric Circuits

Answer»

The correct choice is (a) True

The best EXPLANATION: The analysis of a circuit containing DEPENDENT SOURCES can be completed using nodal and MESH analysis with the help of Kirchhoff’s laws and also by using VARIOUS circuit theorems.
Discussion
3.

In an ICVS which is the controlled source and which one is the dependent source?(a) V-controller, I-dependent(b) V-dependent, I-controller(c) Both V and I are controllers(d) Both V and I are dependentI have been asked this question in an international level competition.Asked question is from Analysis of a Circuit Containing Dependent Sources topic in division Circuit Variables and Elements of Electric Circuits

Answer»

The CORRECT choice is (B) V-dependent, I-CONTROLLER

For explanation: ICVS :Current-controlled voltage source. va=βia , voltage value DEPENDS on the current value so current source is the controller and voltage is the dependent source.
Discussion
4.

In a VCIS which is the controlled source and which one is the dependent source?(a) V-contorller, I-dependent(b) V-dependent, I-controller(c) Both V and I are controllers(d) Both V and I are dependentThe question was asked by my college professor while I was bunking the class.My doubt is from Analysis of a Circuit Containing Dependent Sources in chapter Circuit Variables and Elements of Electric Circuits

Answer»

Correct option is (a) V-contorller, I-dependent

For EXPLANATION: VCIS: Voltage-controlled current SOURCE. ia=βva, current value depends on the voltage value so voltage source is the CONTROLLER and current is the dependent source.
Discussion
5.

The value of the current controlled voltage source ,given β=0.8 and ia=9.5mA, is ___________(a) 8mV(b) 7.6mV(c) 0.0011mV(d) 0.0051mVI have been asked this question in final exam.My query is from Analysis of a Circuit Containing Dependent Sources topic in section Circuit Variables and Elements of Electric Circuits

Answer» RIGHT OPTION is (B) 7.6mV

Easy EXPLANATION: va=βia
Discussion
6.

Find I0in the following circuit, R1= 1.1 kilo ohms, R2=3.25 kilo ohms, V= 3.7 v.(a) 1.5 mA(b) 2 mA(c) 0.5 mA(d) 1.2 mAThis question was posed to me in an online interview.This is a very interesting question from Analysis of a Circuit Containing Dependent Sources in portion Circuit Variables and Elements of Electric Circuits

Answer»

Right choice is (d) 1.2 mA

Explanation: By USING the FACT that the current is same inseries connection resistors and voltage is same parallel, the above problem can be solved. I0 is divided into αIx and Ix.So, CALCULATION these TWO gives the required current VALUE.
Discussion
7.

The value of the voltage controlled current source ia=βvagiven β=0.3 and va=9.5mV.(a) 2.5 mA(b) 2.85 mA(c) 1.75 mA(d) 1.2 mAI have been asked this question in an online interview.My query is from Analysis of a Circuit Containing Dependent Sources in division Circuit Variables and Elements of Electric Circuits

Answer» CORRECT choice is (B) 2.85 mA

The EXPLANATION is: ia= 0.3*9.5*10^-3=2.85mA.
Discussion
8.

In case of a dependent voltage/current source, the value of this voltage/current source depends on _________(a) Voltage/current sources of an external circuit(b) Voltage/current source present somewhere in the circuit(c) Only on voltage sources(d) Only on current sourcesThe question was asked during an interview.The doubt is from Analysis of a Circuit Containing Dependent Sources in portion Circuit Variables and Elements of Electric Circuits

Answer»

The CORRECT choice is (B) Voltage/current source present somewhere in the CIRCUIT

Best EXPLANATION: The name dependent itself tells us that they are dependent on some other source. A dependent voltage/current source depends on the value of the voltage/current source present somewhere in the circuit itself.
Discussion
9.

Dependent sources are _____________ types.(a) 3(b) 2(c) 4(d) 1This question was posed to me by my school principal while I was bunking the class.My enquiry is from Analysis of a Circuit Containing Dependent Sources topic in section Circuit Variables and Elements of Electric Circuits

Answer»

The correct ANSWER is (c) 4

For explanation I WOULD SAY: Dependent SOURCES are 4 types. VOLTAGE controlled voltage/current source and current controlled current/voltage source.
Discussion
10.

A junction whell two (or) more than two network elements meet is known as a ______________(a) Node(b) Branch(c) Loop(d) MeshThe question was posed to me in an online quiz.This intriguing question originated from Kirchhoff’s Laws topic in portion Circuit Variables and Elements of Electric Circuits

Answer» CORRECT OPTION is (a) Node

For explanation: Node is a junction where TWO or more than two NETWORK elements meet.
Discussion
11.

The basic laws for analyzing an electric circuit are :-(a) Einstein’s theory(b) Newtons laws(c) Kirchhoff’s laws(d) Faradays lawsI have been asked this question in a national level competition.I would like to ask this question from Kirchhoff’s Laws in section Circuit Variables and Elements of Electric Circuits

Answer» RIGHT answer is (c) KIRCHHOFF’s laws

For explanation I WOULD say: Kirchhoff’s laws are used for analyzing an electric CIRCUIT.
Discussion
12.

All _____________ are loops but _______________ are not meshes(a) Loops, Meshes(b) Meshes, loops(c) Branches, loops(d) Nodes, BranchesThis question was addressed to me in an online quiz.Question is taken from Kirchhoff’s Laws topic in portion Circuit Variables and Elements of Electric Circuits

Answer»

Right option is (B) MESHES, loops

Best EXPLANATION: A mesh cannot be DIVIDED further in loops.
Discussion
13.

Determine currents I1 , I2 and I3.(a) -3.3A, -8.5A, 2.4A(b) 3A, -8A, 2A(c) 3.3A, 8.5A, -2.4A(d) 3.2A, 8.6A, 2.3AThe question was posed to me by my school principal while I was bunking the class.The origin of the question is Kirchhoff’s Laws topic in chapter Circuit Variables and Elements of Electric Circuits

Answer»

Right OPTION is (c) 3.3A, 8.5A, -2.4A

Explanation: I1 = I1 – I2 + 8 + I3 + 3

I2 – I3 = 11 -> 1

And -11 I1 – 7(I1 – I2) = 0

-18 I1 + 7 I2 = 0 -> 2

And -11 I1 – 15 I3 =0-> 3

Solving I1= 3.32A I2 = 8.5AI3 = -2.4A.
Discussion
14.

The algebraicsum of voltages around any closed path in a network is equal to ____________(a) Infinity(b) 1(c) 0(d) Negative polarityI have been asked this question in unit test.This intriguing question comes from Kirchhoff’s Laws topic in division Circuit Variables and Elements of Electric Circuits

Answer»

Correct choice is (c) 0

To elaborate: According to KVL, the SUM of VOLTAGES AROUND the closed path in a network is zero.
Discussion
15.

Relation between currents according to KCL is(a) i1=i2=i3=i4=i5(b) i1+i4+i3=i5+i2(c) i1-i5=i2-i3-i4(d) i1+i5=i2+i3+i4I have been asked this question by my school teacher while I was bunking the class.The origin of the question is Kirchhoff’s Laws topic in division Circuit Variables and Elements of Electric Circuits

Answer»

Correct OPTION is (d) i1+i5=i2+i3+i4

The explanation is: ACCORDING to KCL, entering CURRENTS=leaving currents.
Discussion
16.

KCL is based on the fact that(a) There is a possibility for a node to store energy.(b) There cannot be an accumulation of charge at a node.(c) Charge accumulation is possible at node(d) Charge accumulation may or may not be possible.The question was posed to me in quiz.My enquiry is from Kirchhoff’s Laws topic in section Circuit Variables and Elements of Electric Circuits

Answer»

Correct ANSWER is (b) There cannot be an accumulation of CHARGE at a node.

To EXPLAIN I would SAY: Since the node is not a CIRCUIT element, any charge which enters node must leave immediately.
Discussion
17.

Relation between power, voltage and conductance(a) V = P^2.G(b) V = P^2/G(c) P = v^2/G(d) P = V^2 GThe question was posed to me during an internship interview.I'm obligated to ask this question of Voltage and Current Sources ,Electrical Resistance topic in section Circuit Variables and Elements of Electric Circuits

Answer»

The CORRECT answer is (d) P = V^2 G

To ELABORATE: P = vi

= v (v/R)

= v^2/R

= v^2G.
Discussion
18.

The conductance of a 923Ω resistance is(a) 1.08 * 10^-3 mho(b) 1.08 * 10^-4 mho(c) 1.02 * 10^-3 mho(d) 1.02 * 10^-4 mhoThe question was asked during a job interview.Query is from Voltage and Current Sources ,Electrical Resistance in section Circuit Variables and Elements of Electric Circuits

Answer» RIGHT ANSWER is (a) 1.08 * 10^-3 mho

The EXPLANATION: c=1/R =1/923 = 1.08 * 10^-3 MH
Discussion
19.

The opposing capacity of materials against the current flow is(a) Conductance(b) Inductance(c) Susceptance(d) ResistanceThe question was posed to me during a job interview.The question is from Voltage and Current Sources ,Electrical Resistance in division Circuit Variables and Elements of Electric Circuits

Answer» CORRECT answer is (d) RESISTANCE

To explain I WOULD say: The opposing capacity of materials against the CURRENT flow is resistance.
Discussion
20.

Inductor is _______________ element.(a) Active(b) Passive(c) Linear(d) PolarThis question was addressed to me during an online exam.This question is from Voltage and Current Sources ,Electrical Resistance topic in division Circuit Variables and Elements of Electric Circuits

Answer»

Right OPTION is (b) PASSIVE

For explanation: Passive ELEMENT MEANS it could not GENERATE electricity.
Discussion
21.

Controlled sources are also known as(a) Independent sources(b) Dependent sources(c) Ideal sources(d) Voltage sourcesThis question was posed to me in an interview for job.My question comes from Voltage and Current Sources ,Electrical Resistance in portion Circuit Variables and Elements of Electric Circuits

Answer»

Correct OPTION is (a) Independent sources

The best EXPLANATION: VOLTAGE V = dw/dq and its SI unit is VOLT.
Discussion
22.

1) The symbol used for representing Independent sources(a) Diamond(b) Square(c) Circle(d) TriangleThe question was asked at a job interview.My query is from Voltage and Current Sources ,Electrical Resistance in portion Circuit Variables and Elements of Electric Circuits

Answer»

Correct choice is (C) Circle

For explanation: INDEPENDENT SOURCES are represented by circle

Dependent sources are represented by DIAMOND.
Discussion
23.

‘Positive Power’ meaning ___________(a) Power is being delivered to circuit(b) Power is being extracted from circuit(c) No power supply(d) Input and output powers are equalI had been asked this question during an interview.This interesting question is from The International System of Units, Voltage and Current, Power and Energy in division Circuit Variables and Elements of Electric Circuits

Answer»

Correct choice is (a) POWER is being delivered to circuit

For explanation: P > 0 MEANS +ve Power

 Being delivered

P < 0 means –ve Power

 Being extracted.
Discussion
24.

For the following circuit power is given by(a) –Vi(b) Vi(c) 0(d) 1The question was asked in my homework.My question is from The International System of Units, Voltage and Current, Power and Energy in section Circuit Variables and Elements of Electric Circuits

Answer»

The CORRECT CHOICE is (a) –Vi

Easy explanation: P = vi. The ALGEBRAIC sign of POWER depends on movement of charge through the DROP and rise of voltage.
Discussion
25.

If energy w = 200t^2+ 99 et + 2 then calculate at 0.1 sec(a) 148.52(b) 149.41(c) 149.95(d) 148.39I had been asked this question in semester exam.The query is from The International System of Units, Voltage and Current, Power and Energy in chapter Circuit Variables and Elements of Electric Circuits

Answer»

Right OPTION is (b) 149.41

To EXPLAIN I would SAY: p=dw/dt

=400t +99e^t

=400(0.1) + 99e^(0.1)

=149.41
Discussion
26.

If charge q = 3t^2 + 2 then current is given by(a) 6t + 2(b) 3t^2(c) 6t(d) 3t^2 + 2The question was posed to me by my college professor while I was bunking the class.This intriguing question originated from The International System of Units, Voltage and Current, Power and Energy topic in section Circuit Variables and Elements of Electric Circuits

Answer» RIGHT OPTION is (C) 6T

The explanation: I = dq/dt= d/dt(3t^2 + 2) = 6t.
Discussion
27.

The energy per unit charge is(a) Voltage(b) Power(c) Current(d) WorkI had been asked this question in homework.My question is taken from The International System of Units, Voltage and Current, Power and Energy topic in chapter Circuit Variables and Elements of Electric Circuits

Answer»

The correct ANSWER is (a) Voltage

To ELABORATE: Voltagev=dw/dq and its SI unit is VOLT.
Discussion
28.

Separation of charge creates(a) Current(b) Voltage(c) Resistance(d) FrictionThe question was asked in exam.This question is from The International System of Units, Voltage and Current, Power and Energy topic in portion Circuit Variables and Elements of Electric Circuits

Answer»

The CORRECT option is (b) Voltage

The explanation is: An electric FORCE called voltage is created by separation of CHARGE where as anelectric FLUID called current is created by MOTION of charge.
Discussion
29.

Charge is(a) Unipolar(b) Bipolar(c) Tripolar(d) Non – Polar in natureThis question was addressed to me during an interview for a job.I'm obligated to ask this question of The International System of Units, Voltage and Current, Power and Energy in portion Circuit Variables and Elements of Electric Circuits

Answer»

Right option is (b) BIPOLAR

For EXPLANATION I would SAY: Charge is bipolar SINCE it can be expressed in terms of POSITIVE and negative.
Discussion
30.

Which of the following is a correct relation?(a) Giga>Mega>Tera(b) Mega>Tera>Giga(c) Tera>Mega>Giga(d) Tera>Giga>MegaI got this question in exam.I'd like to ask this question from The International System of Units, Voltage and Current, Power and Energy topic in section Circuit Variables and Elements of Electric Circuits

Answer»

Correct answer is (d) TERA>Giga>Mega

The BEST I can EXPLAIN: Tera – 10^12

Giga – 10^9

Mega – 10^6.
Discussion
31.

The basic unit for luminous intensity is(a) Ampere(b) Candela(c) Coulomb(d) RadianThe question was posed to me by my school principal while I was bunking the class.Query is from The International System of Units, Voltage and Current, Power and Energy in portion Circuit Variables and Elements of Electric Circuits

Answer» CORRECT answer is (b) CANDELA

Explanation: The UNIT for LUMINOUS intensity is candela and its symbol is cd.
Discussion
32.

Which of the following is a defined quantity?(a) Pressure(b) Polarity(c) Money(d) LengthI got this question in quiz.Query is from The International System of Units, Voltage and Current, Power and Energy topic in section Circuit Variables and Elements of Electric Circuits

Answer» CORRECT answer is (d) Length

The best I can explain: The SI units are based on 7 defined quantities NAMELY length, mass, time, electric CURRENT, thermodynamic TEMPERATURE, amount of substance and also on the luminous intensity.
Discussion