NTA UGC NET/JRF Exam, June -2021 (Electronic Science)

Total Questions: 100

21. What is the operation and result of the following instruction, given the register content shown in Figure 1.

Correct Answer: B. The content of IP is replaced with 023АН and program execution jumps to 2023АН.

22. If the data segment register (DS) contains 4000H, what physical address will the instruction MOV, AL, [234BH] read?

Correct Answer: D. 4234BH

23. The three basic structure types used to write the algorithm for a program are sequencc, selection and repetition. Which of the following is NOT an advantage of using only these structures when writing the algorithm for a program?

Correct Answer: C. Algorithm has very low space complexity.

24. Which is lowest priority interrupt of 8086 microprocessor?

Correct Answer: D. SINGLE-STEP

25. For parallel polarisation, for lossless dielectrics, the expression for Brewster angle for a wave traveling from medium 1 to the medium of refractive indices η₁ and η₂ respectively is:

Correct Answer: B.

26. Choose the correct answer.

Correct Answer: C. 24

27. Water flowing in x direction has a rate of

Correct Answer: B. 27 liters/minute

28. The value of transmission line impedance of a coaxial line of internal diameter 'a' and external diameter 'b' is given by the expression:

Correct Answer: C.

29. In a multimode fiber (step index), number of modes passing at an operating wavelength of 1300 nm are 1000, the refractive index of the core is 1.50 and that of the cladding is 1.48. The value of core diameter is:

Correct Answer: C. 125 µm

30. In optical fibers, the Rayleigh scattering is proportional to:

Correct Answer: D.