NTA UGC NET/JRF Exam, September-2022 (Electronic Science)

Total Questions: 100

51. The steps for subtracting two positive numbers (M-N) using (r - 1)'s complement are:

(a) Add the minuend M to the (r 1)'s complement of the substrahend N.
(b) If an end carry occurs, add 1 to the least significant bit.
(c) If end carry does not occur, take the (r- 1)'s complement of the number obtained in step (a) and place negative sign in front
(d) Take (r - 1)'s complement of the number obtained in step (b) on step (c).
Choose the correct answer from the options given belelow.

Correct Answer: B. (a), (b), (c) only

52. For an RS flip flop:

(a) R = 0, S = 0, Qₙ+ 1 = 1
(b) R = 0, S = 0, Q+1 = Qₙ
(c) R = 0, S = 0, Qₙ+1 = Qₙ
(d) R = 1, S = 0, Qₙ + 1 = 0
(e) R = 0, S = 1, Qₙ + 1 = 1
Choose the correct answer from the options given below:

Correct Answer: A. (c), (d), (e) only

53. The methods of passing parameters to a procedure are:

(a) Using interrupt routine
(b) Using general memory and named memory locations
(c) Using register to pass values of the variables
(d) Using the stack to pass values of variables
Choose the correct answer from the options given below:

Correct Answer: D. (b), (c), (d) only

54. Which of the following steps are necessary for developing an assembly language program?

(a) Write down in general terms the algorithm for the task program has to solve using flow chart.
(b) Write an initialization check-list for your program
(c) Determine instruction statements required to do each part of the program
(d) Start writing assembly language code for the program
(e) Execute the program on the microprocessor
Choose the correct answer from the options given below:

Correct Answer: D. (a), (b), (c), (d) only

55. Read the following statements regarding signal flow graph.

(a) The signal travels along a branch in the direction of an arrow.
(b) The Node transmitts signals in all the branches entering at that Node.
(c) Input signal at Node is the sum of all signals leaving that Node.
(d) The input signal is multiplied by the transmittance to obtain the output signal.
Choose the correct answer from the options given below:

Correct Answer: C. (a) and (d) only

56. For sky waves, following statements are given:

Choose the correct answer from the options given below:

Correct Answer: C. (b), (c), (d), (e) only

57. For Poynting vector, following are given:

Choose the correct answer from the options given below:

Correct Answer: D. (a) and (b) only

58. For electrical drives:

Choose the correct answer from the options given below:

Correct Answer: A. (b), (c), (e) only

59. In optical fibers, following statements are given:

Correct Answer: C. (a), (c), (e) only

60. In induction motors:

(a) In regenerative breaking, the synchronous speed is greater than rotor speed
(b) The slip is Negative in regenerative breaking
(c) In regenerative breaking rotor speed is greater than synchronous speed
(d) The slip is positive in regenerative breaking
Choose the correct answer from the options given below:

Correct Answer: C. (b) and (c) only