NTA UGC NET/JRF Exam, June -2020 (Electronic Science)

Total Questions: 100

21. The program written below gives

MOV A, #85 H
CPL A,
ADD A, #

Correct Answer: E. (*)

22. The relationship between revolution per minute (rpm), steps per revolution (spr) and steps per second (sps) is given by:

Correct Answer: A.

23. What happens if Interrupts INTO, TFO and INT 1 are activated at the same time?

Correct Answer: A. They are latched and kept internally

24. In the Register Indirect addressing mode, the effective address of the datum in the base register or an index register that is specified by the instruction is

Correct Answer: B.

25. RG-59 U type transmission line has an open

Correct Answer: B.

26. An air filled rectangular waveguide of dimension 7 x 3.5 cm² operates in the dominant TE₁₀ mode, The value of phase velocity of the wave in the guide at a frequency of 3.5 GHz is given by:

Correct Answer: A. 3.78 x 10⁸ m/S

27. In case of linear arrays of 'n' isotropіc point sources of equal amplitude and spacings, The expression for total electric field at a large distance in the direction, '', is given by:

Correct Answer: D.

28. A sphere of radius r₁ =30 cm has a charge

Correct Answer: C. 17 pC

29. A VSB transmitter that transmits 25% of the other sideband along with wanted sideband, radiates 0.625 kW when the modulation percentage is 60%. If we want to transmit the same message by an AM transmitter then carrier power (in kW) required is:

Correct Answer: B. 5.56 kW

30. The term dispersion describe the process of:

Correct Answer: D. separating light into its component frequencies