29 + Interview Questions in Single-Phase Parallel Networks in Basic Electrical Engineering Page 1 InterviewSolution

1.	Find the total current if IL=2A and IR=8A.(a) 3A(b) -3A(c) 7A(d) 10AThis question was addressed to me in homework.This question is from Parallel Impedance Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» RIGHT OPTION is (d) 10A The EXPLANATION: We KNOW that I=IR+IL. I=8+2=10A.

Discussion

2.	What is the expression for the current in the inductor from the following circuit?(a) V/I(b) V/XL(c) 0(d) Cannot be determinedThis question was posed to me at a job interview.My enquiry is from Simple Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» RIGHT choice is (b) V/XL Explanation: In the given circuit, the voltage across the INDUCTOR is the same as the SOURCE voltage as they are connected in parallel. The CURRENT in the inductor is IL hence IL=V/XL.

Discussion

3.	In A parallel circuit, with any number of impedances, The voltage across each impedance is?(a) equal(b) divided equally(c) divided proportionaly(d) zeroI had been asked this question during an interview.This interesting question is from Basic AC Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Correct option is (a) equal The best I can explain: In parallel circuits, the current across the circuits VARY WHEREAS the VOLTAGE REMAINS the same. So, voltage across each IMPEDANCE is equal in parallel circuit.

Discussion

4.	What is the unit of admittance?(a) ohm(b) henry(c) farad(d) ohm^-1This question was posed to me in homework.My doubt is from Basic AC Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» The CORRECT choice is (d) ohm^-1 For explanation: The unit for admittance is ohm^-1 because the unit of IMPEDANCE is ohm and admittance is the reciprocal of impedance.

Discussion

5.	In a parallel circuit, we consider admittance instead of _________(a) Resistance(b) Capacitance(c) Inductance(d) ImpedanceI had been asked this question during an interview.Question is taken from Basic AC Parallel Circuits in division Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» The CORRECT ANSWER is (d) Impedance The explanation: In a PARALLEL circuit, we consider admittance INSTEAD of impedance, where admittance is the RECIPROCAL of impedance.

Discussion

6.	Find the value of IL if IC=10A and IR=6A.(a) 4A(b) 18A(c) 12A(d) 2AThe question was posed to me in an interview.I'm obligated to ask this question of Simple Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Correct choice is (a) 4A To explain I would say: I is the TOTAL current in the circuit. Since this is a parallel CONNECTION, the total current in the circuit is equal to the sum of the CURRENTS in each branch of the circuit. HENCE I=IC+IR. 10=IC+6=>IC=4A.

Discussion

7.	In an impedance parallel network, the reactive component will either lead or lag the voltage by _________ degrees.(a) 0(b) 90(c) 45(d) 180I got this question by my college director while I was bunking the class.My question is from Parallel Impedance Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Right choice is (b) 90 To explain I would say: In an impedance parallel network the REACTIVE COMPONENT will either lead or LAG the voltage by 90 degrees.

Discussion

8.	In an impedance parallel network, the reactive component will ____________ the voltage by 90 degrees.(a) Lead(b) Lag(c) Either lead or lag(d) Depends on the circuitI got this question in examination.The query is from Parallel Impedance Circuits in section Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» RIGHT OPTION is (c) Either LEAD or lag The explanation is: In an impedance parallel network the reactive component will either lead or lag the VOLTAGE by 90 degrees.

Discussion

9.	Find the expression for the current I from the given circuit.(a) I=IC(b) I=IR(c) I=IC+IR(d) I=0This question was posed to me by my college director while I was bunking the class.Asked question is from Simple Parallel Circuits in division Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» CORRECT ANSWER is (c) I=IC+IR The explanation: I is the TOTAL current in the circuit. Since this is a PARALLEL connection, the total current in the circuit is equal to the sum of the currents in each BRANCH of the circuit. Hence I=IC+IR.

Discussion

10.	Which, among the following is the correct expression for impedance?(a) Z=Y(b) Z=1/Y(c) Z=Y^2(d) Z=1/Y^2I got this question in semester exam.Question is taken from Basic AC Parallel Circuits topic in section Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» RIGHT OPTION is (B) Z=1/Y Explanation: We know that impedance is the reciprocal of admittance, hence the correct expression for impedance is: Z=1/Y.

Discussion

11.	What is the phase relation between IL and V from the following circuit?(a) IL lags V(b) IL leads V(c) IL and V are in phase(d) No relationThis question was addressed to me during an online exam.Asked question is from Simple Parallel Circuits in section Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Correct ANSWER is (a) IL lags V Explanation: IL is the current across the inductor and we know that the current across the inductor always lags the VOLTAGE across it. HENCE IL lags V.

Discussion

12.	Find the total current if IC=2A and IR=5A.(a) 3A(b) -3A(c) 7A(d) 10AThe question was posed to me in an interview.I would like to ask this question from Simple Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Right answer is (c) 7A To explain: I is the total current in the CIRCUIT. Since this is a parallel CONNECTION, the total current in the circuit is EQUAL to the sum of the currents in each branch of the circuit. Hence I=IC+IR. I=2+5=7A.

Discussion

13.	As the impedance increases, the admittance ____________(a) Increases(b) Decreases(c) Remains the same(d) Becomes zeroThis question was posed to me by my school teacher while I was bunking the class.This question is from Basic AC Parallel Circuits topic in section Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» The correct OPTION is (b) Decreases Explanation: As the impedance INCREASES, the ADMITTANCE decreases because admittance is equal to 1/impedance.

Discussion

14.	The phase difference between the active component of an impedance parallel circuit and the voltage in the network is __________(a) 0(b) 90(c) 180(d) 360This question was addressed to me during an online interview.I want to ask this question from Parallel Impedance Circuits topic in chapter Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Correct answer is (a) 0 For explanation I would SAY: The active COMPONENT in an impedance PARALLEL network will always be in phase with the voltage in the circuit. Hence the phase DIFFERENCE is 0.

Discussion

15.	The reactive component in an impedance parallel circuit leads the voltage when the current _________ the voltage.(a) Leads(b) Lags(c) Either leads or lags(d) Cannot be determinedThe question was posed to me during an internship interview.My doubt stems from Parallel Impedance Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» The correct ANSWER is (a) Leads To EXPLAIN: The REACTIVE component in an IMPEDANCE PARALLEL circuit leads the voltage when the current leads the voltage.

Discussion

16.	if the impedance of a system is 4 ohm, calculate its admittance.(a) 0.25 ohm^-1(b) 4 ohm^-1(c) 25 ohm^-1(d) 0.4 ohm^-1I had been asked this question in homework.This interesting question is from Basic AC Parallel Circuits topic in chapter Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» CORRECT choice is (a) 0.25 ohm^-1 For EXPLANATION: We KNOW that: Y=1/Z. Substituting the value of Z from the question, we get Y = 1/4 = 0.25 => Y= 0.25 ohm^-1.

Discussion

17.	In a parallel circuit, we consider _____________ instead of impedance.(a) Resistance(b) Capacitance(c) Inductance(d) AdmittanceI got this question in an online quiz.My query is from Basic AC Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Correct choice is (d) ADMITTANCE Easiest EXPLANATION: In a parallel circuit, we consider admittance INSTEAD of impedance, where admittance is the RECIPROCAL of impedance.

Discussion

18.	Find the value of IR if I=10A and IL=8A.(a) 5A(b) 18A(c) 12A(d) 2AI had been asked this question in a job interview.I would like to ask this question from Parallel Impedance Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» RIGHT CHOICE is (d) 2A For EXPLANATION: We KNOW that I=IR+IL. 10=IR+8=>IR=2A.

Discussion

19.	The active component in an impedance parallel circuit will __________ the voltage.(a) Leads(b) Lags(c) Be in phase with(d) Either leads or lagsThe question was asked by my college director while I was bunking the class.I would like to ask this question from Parallel Impedance Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» RIGHT answer is (c) Be in phase with For EXPLANATION: The active component in an IMPEDANCE PARALLEL network will always be in phase with the voltage in the CIRCUIT.

Discussion

20.	From the given circuit, find the value of IR.(a) 0(b) V/I(c) V/R(d) Cannot be determinedThe question was asked during an interview.My enquiry is from Simple Parallel Circuits in division Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» The correct ANSWER is (c) V/R Easiest EXPLANATION: In the given circuit, the VOLTAGE across the resistor is the same as the source voltage as they are connected in parallel. The current in the resistor is IR hence IR=V/R.

Discussion

21.	In a parallel circuit, current in each impedance is_____________(a) equal(b) different(c) zero(d) infiniteI have been asked this question in an interview for job.The question is from Basic AC Parallel Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Right option is (B) different Easiest explanation: In PARALLEL circuits, the current ACROSS the circuits vary whereas the voltage REMAINS the same. So, current in each IMPEDANCE is different.

Discussion

22.	The admittance of a system is 10 ohm^-1, calculate its impedance.(a) 10 ohm(b) 0.1 ohm(c) 1 ohm(d) 1.1 ohmThis question was posed to me in an online interview.My question is from Basic AC Parallel Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» The correct choice is (b) 0.1 ohm To explain: We KNOW that: Z=1/Y. Z = 1/10 = 0.1=>Z = 0.1 ohm.

Discussion

23.	Which, among the following is the correct expression for admittance?(a) Y=Z(b) Y=1/Z(c) Y=Z^2(d) Y=1/Z^2This question was posed to me in semester exam.Query is from Basic AC Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Correct CHOICE is (b) Y=1/Z Explanation: We KNOW that admittance is the RECIPROCAL of IMPEDANCE, hence the correct expression for admittance is: Y=1/Z.

Discussion

24.	What is the relation between IR and V in the following circuit?(a) IR leads V(b) IR lags V(c) IR and V are in phase(d) No relationThe question was asked in unit test.The query is from Simple Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Correct CHOICE is (c) IR and V are in PHASE Easy explanation: In the following CIRCUIT IR and V are in phase because IR is the current in the resistor and the current in the resistor is always in phase with the voltage ACROSS it.

Discussion

25.	In an impedance parallel network, the reactive component will either lead or lag the ________ by 90 degrees.(a) Voltage(b) Current(c) Either voltage or current(d) Cannot be determinedI got this question in quiz.The doubt is from Parallel Impedance Circuits in division Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» The correct choice is (a) Voltage The best I can explain: In an IMPEDANCE PARALLEL network the REACTIVE component will either LEAD or lag the voltage by 90 degrees.

Discussion

26.	What is the expression for the current in the capacitor from the following circuit?(a) V/C(b) V/I(c) 0(d) V/XCThe question was asked in my homework.The origin of the question is Simple Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Right CHOICE is (d) V/XC The explanation is: In the given circuit, the voltage ACROSS the capacitor is the same as the source voltage as they are connected in PARALLEL. The current in the capacitor is IC HENCE IC=V/XC.

Discussion

27.	Find the value of IR if I=10A and IC=8A.(a) 5A(b) 18A(c) 12A(d) 2AI got this question during an interview for a job.My doubt is from Simple Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Right answer is (d) 2A Easy EXPLANATION: I is the total CURRENT in the circuit. Since this is a parallel connection, the total current in the circuit is equal to the SUM of the currents in each branch of the circuit. Hence I=IC+IR. 10=8+IR=>IR=2A.

Discussion

28.	What is the phase relation between IC and V from the following circuit?(a) IC lags V(b) IC leads V(c) IC and V are in phase(d) No relationI have been asked this question in an online interview.I would like to ask this question from Simple Parallel Circuits topic in division Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» The correct choice is (B) IC leads V Explanation: IC is the current across the capacitor and we know that the current across the capacitor ALWAYS leads the voltage across it. HENCE IC leads V.

Discussion

29.	The quadrature component is also known as?(a) Active component(b) Reactive component(c) Either active or reactive component(d) Neither active nor reactive componentThis question was posed to me in an international level competition.I need to ask this question from Parallel Impedance Circuits topic in section Single-Phase Parallel Networks of Basic Electrical Engineering
Answer» Correct ANSWER is (b) Reactive component To explain: The QUADRATURE component is ALSO KNOWN as the reactive component because the reactive component forms a quadrature with the voltage.

Discussion

Explore topic-wise InterviewSolutions in .

Find the total current if IL=2A and IR=8A.(a) 3A(b) -3A(c) 7A(d) 10AThis question was addressed to me in homework.This question is from Parallel Impedance Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering

What is the expression for the current in the inductor from the following circuit?(a) V/I(b) V/XL(c) 0(d) Cannot be determinedThis question was posed to me at a job interview.My enquiry is from Simple Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering

What is the unit of admittance?(a) ohm(b) henry(c) farad(d) ohm^-1This question was posed to me in homework.My doubt is from Basic AC Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering

In a parallel circuit, we consider admittance instead of _________(a) Resistance(b) Capacitance(c) Inductance(d) ImpedanceI had been asked this question during an interview.Question is taken from Basic AC Parallel Circuits in division Single-Phase Parallel Networks of Basic Electrical Engineering

Find the value of IL if IC=10A and IR=6A.(a) 4A(b) 18A(c) 12A(d) 2AThe question was posed to me in an interview.I'm obligated to ask this question of Simple Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering

Which, among the following is the correct expression for impedance?(a) Z=Y(b) Z=1/Y(c) Z=Y^2(d) Z=1/Y^2I got this question in semester exam.Question is taken from Basic AC Parallel Circuits topic in section Single-Phase Parallel Networks of Basic Electrical Engineering

Find the total current if IC=2A and IR=5A.(a) 3A(b) -3A(c) 7A(d) 10AThe question was posed to me in an interview.I would like to ask this question from Simple Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering

In a parallel circuit, we consider _____________ instead of impedance.(a) Resistance(b) Capacitance(c) Inductance(d) AdmittanceI got this question in an online quiz.My query is from Basic AC Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering

Find the value of IR if I=10A and IL=8A.(a) 5A(b) 18A(c) 12A(d) 2AI had been asked this question in a job interview.I would like to ask this question from Parallel Impedance Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering

From the given circuit, find the value of IR.(a) 0(b) V/I(c) V/R(d) Cannot be determinedThe question was asked during an interview.My enquiry is from Simple Parallel Circuits in division Single-Phase Parallel Networks of Basic Electrical Engineering

In a parallel circuit, current in each impedance is_____________(a) equal(b) different(c) zero(d) infiniteI have been asked this question in an interview for job.The question is from Basic AC Parallel Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering

The admittance of a system is 10 ohm^-1, calculate its impedance.(a) 10 ohm(b) 0.1 ohm(c) 1 ohm(d) 1.1 ohmThis question was posed to me in an online interview.My question is from Basic AC Parallel Circuits topic in portion Single-Phase Parallel Networks of Basic Electrical Engineering

Which, among the following is the correct expression for admittance?(a) Y=Z(b) Y=1/Z(c) Y=Z^2(d) Y=1/Z^2This question was posed to me in semester exam.Query is from Basic AC Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering

What is the relation between IR and V in the following circuit?(a) IR leads V(b) IR lags V(c) IR and V are in phase(d) No relationThe question was asked in unit test.The query is from Simple Parallel Circuits in portion Single-Phase Parallel Networks of Basic Electrical Engineering

What is the expression for the current in the capacitor from the following circuit?(a) V/C(b) V/I(c) 0(d) V/XCThe question was asked in my homework.The origin of the question is Simple Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering

Find the value of IR if I=10A and IC=8A.(a) 5A(b) 18A(c) 12A(d) 2AI got this question during an interview for a job.My doubt is from Simple Parallel Circuits in chapter Single-Phase Parallel Networks of Basic Electrical Engineering