Ra is resistance at A, Rb is resistance at B, Rc is resistance at C in star connection. After transforming to delta, what is resistance between A and C?(a) Ra+Rb+Ra*Rb/Rc(b) Ra+Rc+Ra*Rc/Rb(c) Ra+Rb+Ra*Rc/Ra(d) Ra+Rc+Ra*Rb/RcThe question was posed to me in semester exam.This interesting question is from Star Delta Transformation in portion Network Theorems of Basic Electrical Engineering

Ra is resistance at A, Rb is resistance at B, Rc is resistance at C in

1.	Ra is resistance at A, Rb is resistance at B, Rc is resistance at C in star connection. After transforming to delta, what is resistance between A and C?(a) Ra+Rb+RaRb/Rc(b) Ra+Rc+RaRc/Rb(c) Ra+Rb+RaRc/Ra(d) Ra+Rc+RaRb/RcThe question was posed to me in semester exam.This interesting question is from Star Delta Transformation in portion Network Theorems of Basic Electrical Engineering
Answer» The CORRECT answer is (b) Ra+Rc+RaRc/Rb To explain I would say: After converting to the delta, each delta connected RESISTANCE is equal to the SUM of the two resistances it is connected to+product of the two resistances divided by the remaining resistance. HENCE, resistance between A and C = Ra+Rc+RaRc/Rb.

Discussion

No Comment Found

Related InterviewSolutions

Which, among the following is the correct expression for star-delta conversion?(a) R1=Ra*Rb/(Ra+Rb+Rc), R2=Rb*Rc/(Ra+Rb+Rc), R3=Rc*Ra/(Ra+Rb+Rc)b)(b) R1=Ra/(Ra+Rb+Rc), R2=Rb/(Ra+Rb+Rc), Rc=/(Ra+Rb+Rc)(c) R1=Ra+Rb+Ra*Rb/Rc, R2=Rc+Rb+Rc*Rb/Ra, R3=Ra+Rc+Ra*Rc/Rb(d) R1=Ra*Rb/Rc, R2=Rc*Rb/Ra, R3=Ra*Rc/RbThis question was posed to me in an online interview.I'm obligated to ask this question of Star Delta Transformation topic in division Network Theorems of Basic Electrical Engineering
If a 4ohm, 3ohm and 2ohm resistor is connected in delta, find the equivalent star connection.(a) 8/9ohm, 4/3ohm, 2/3ohm(b) 8/9ohm, 4/3ohm, 7/3ohm(c) 7/9ohm, 4/3ohm, 2/3ohm(d) 8/9ohm, 5/3ohm, 2/3ohmI got this question in examination.This intriguing question originated from Delta Star Transformation topic in chapter Network Theorems of Basic Electrical Engineering
In superposition theorem, when we consider the effect of one voltage source, all the other current sources are ____________(a) Shorted(b) Opened(c) Removed(d) UndisturbedThe question was posed to me in an online interview.I'm obligated to ask this question of Superposition Theorem in division Network Theorems of Basic Electrical Engineering
In superposition theorem, when we consider the effect of one current source, all the other voltage sources are ____________(a) Shorted(b) Opened(c) Removed(d) UndisturbedThis question was posed to me during an online exam.This key question is from Superposition Theorem topic in portion Network Theorems of Basic Electrical Engineering
Calculate the node voltages.(a) 30.77V, 7.52V, 18.82V(b) 32.34V, 7.87V, 8.78V(c) 34.34V, 8.99V, 8.67V(d) 45.44V, 6.67V, 7.77VThis question was posed to me in an interview.My enquiry is from Nodal Analysis topic in portion Network Theorems of Basic Electrical Engineering
Find the value of I1, I2 and I3.(a) -0.566A, 1.29A, -1.91A(b) -1.29A, -0.566A, 1.91A(c) 1.29A, -0.566A, -1.91A(d) 1.91A, 0.566A, 1.29AI have been asked this question in final exam.Question is from Kirchhoff’s Laws and Network Solutions in chapter Network Theorems of Basic Electrical Engineering
Find the equivalent delta circuit.(a) 9.69 ohm, 35.71 ohm, 6.59 ohm(b) 10.69 ohm, 35.71 ohm, 6.59 ohm(c) 9.69 ohm, 34.71 ohm, 6.59 ohm(d) 10.69 ohm, 35.71 ohm, 7.59 ohmI have been asked this question in homework.My doubt stems from Star Delta Transformation in section Network Theorems of Basic Electrical Engineering
A source transformation is_________(a) Unilateral(b) Bilateral(c) Unique(d) Cannot be determinedI got this question in an interview for internship.Origin of the question is SourceTransformations in section Network Theorems of Basic Electrical Engineering
Can we use Norton’s theorem on a circuit containing a BJT?(a) Yes(b) No(c) Depends on the BJT(d) Insufficient data providedThis question was posed to me in unit test.The origin of the question is Norton’s Theorem in chapter Network Theorems of Basic Electrical Engineering
Find the value of Vx due to the 16V source.(a) 4.2V(b) 3.2V(c) 2.3V(d) 6.3VI had been asked this question in a job interview.I would like to ask this question from Superposition Theorem in section Network Theorems of Basic Electrical Engineering

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment