Related InterviewSolutions

• In a microwave test bench, why is the microwave signal amplitude modulated at 1 kHz?(a) To increase the sensitivity of measurement(b) To transmit the signal to a far off place(c) To study amplitude modulation(d) Because crystal detector fails at microwave frequenciesI had been asked this question in an internship interview.The doubt is from Advanced and Tricky Questions in chapter Advanced and Tricky Questions of Electromagnetic Theory
• The modes in a rectangular waveguide are denoted by TEmn / TMmn, where m and n are the Eigen values along the larger and smaller dimensions of the waveguide respectively. Which one of the following statements is true?(a) The TM10 mode does not exist(b) The TE10 mode does not exist(c) The TE10 and TM10 both exist and have same cut off frequencies(d) When m and n are increases, the cut off frequency decreasesThis question was posed to me during an online interview.This interesting question is from Advanced and Tricky Questions in chapter Advanced and Tricky Questions of Electromagnetic Theory
• A transmission line of pure resistance characteristic impedance is terminated with an unknown load. The measured value of VSWR on the line is 2 and a voltage minimum point is found to be at the load. The load impedance is then(a) Complex(b) Purely capacitive(c) Purely resistive(d) Purely inductiveI got this question during an interview.Question is from Advanced and Tricky Questions topic in chapter Advanced and Tricky Questions of Electromagnetic Theory
• Which one of the following field patterns represents a TEM wave travelling in the positive x direction?(a) E = +8y, H = -4z(b) E = -2y, H = -3z(c) E = +2z, H = +2y(d) E = -3y, H = +4zThe question was posed to me in homework.The question is from Advanced and Tricky Questions in portion Advanced and Tricky Questions of Electromagnetic Theory
• A two wire transmission line of characteristic impedance Z is connected to a load impedance ZL(ZL and Zo are not equal). Impedance matching cannot be achieved with(a) A quarter wavelength transformer(b) A half wavelength transformer(c) An open circuited parallel stub(d) A short circuited parallel stubThe question was posed to me in final exam.Origin of the question is Advanced and Tricky Questions topic in division Advanced and Tricky Questions of Electromagnetic Theory
• A transmission line whose characteristic impedance is a pure resistance(a) Must be a lossless line(b) Must be a distortionless line(c) May not be a lossless line(d) May be a lossless and may not be a distortionless lineI have been asked this question by my school teacher while I was bunking the class.My question comes from Advanced and Tricky Questions topic in portion Advanced and Tricky Questions of Electromagnetic Theory
• Consider a transmission line of characteristic impedance 50 ohm. Let it be terminated at one end by +j50 ohm. The VSWR produced by it in the transmission line will be(a) 1(b) 0(c) Infinity(d) +jI had been asked this question during an interview for a job.Query is from Advanced and Tricky Questions in portion Advanced and Tricky Questions of Electromagnetic Theory
• Which parameters cannot be computed from the Smith chart?(a) Impedance(b) Admittance(c) Reflection coefficient and VSWR(d) Intrinsic impedanceThe question was posed to me in an interview.The doubt is from Advanced and Tricky Questions topic in chapter Advanced and Tricky Questions of Electromagnetic Theory
• In the design of a single mode step index optical fiber close to upper cut off, the single mode operation is NOT preserved if(a) Radius as well as operating wavelength are halved(b) Radius as well as operating wavelength are doubled(c) Radius is halved and operating wavelength is doubled(d) Radius is doubled and operating wavelength is halvedThe question was asked during an interview.Query is from Advanced and Tricky Questions topic in portion Advanced and Tricky Questions of Electromagnetic Theory
• The minimum distance of the stub from the load side is 5 cm. Calculate the guided wavelength of the transmission line.(a) 5 cm(b) 2.5 cm(c) 10 cm(d) 1.25 cmThe question was posed to me in final exam.I want to ask this question from Advanced and Tricky Questions topic in portion Advanced and Tricky Questions of Electromagnetic Theory