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

Total Questions: 100

81. Arrange the different operations to run instructions in a computer system, from the beginning to last stage:

(a) Instruction decode
(b) Instruction fetch
(c) Operand fetch
(d) Execute
Choose the correct answer from the options given below:

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

82. Arrange the following antennas in ascending order of their radiation resistance.

Choose the correct answer from the options given below:

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

83. Arrange the following modulation systems in decreasing order of the bandwidth requirements.

(a) Single Side Band
(b) Double Side Band
(c) Vestigial Side Band
(d) Frequency Modulation
Choose the correct answer from the options given below:

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

84. Arrange the following system types in ascending order of their intersection with 0 dB axis.

(a) Type N system
(b) Type 3 system
(c) Type 2 system
(d) Type 4 system
Choose the correct answer from the options given below:

Correct Answer: A. (a), (d), (b), (c)

85. Arrange the following manometric liquid in ascending order of their specific gravity at 20°C.

(a) Water
(b) Carbon tetrachloride
(c) Transformer Oil
(d) Mercury
(e) Dibutylphthalate
Choose the correct answer from the options given below

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

86. Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A): When MOSFET is in conductive state, the saturation current flow after the channel is pinched off.
Reason (R): The substrate bias affects the threshold voltage of a MOSFEТ.
In light of the above statements, choose the most appropriate answer from the options given below:

Correct Answer: B. Both (A) and (R) are correct, but (R) is not the correct explanation of (A)

87. Given below are two statements:

Statement I: The scaling theorem relates scale changes in frequency domain to the consequent changes in scale in the time domain.
Statement II: The scaling theorem is not applicable to an impulse signal.
In light of the above statements, choose the correct answer from the options given below:

Correct Answer: A. Both Statement I and Statement II are true

88. Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A): A reflex klystron is a single cavity high power generator of efficiency 90%.
Reason (R): The loop gain is unity with a phase shift of multiple of 2π. In light of the above statements, choose the most appropriate answer from the options given below:

Correct Answer: D. (A) is not correct, but (R) is correct

89. Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A): Major advantage of DRAM is that the capacitor cell never loses its charge and hence there is no need to refresh periodically.
Reason (R): When DRAM is being refreshed, the data cannot be accessed.
In light of the above statements, choose the correct answer from the options given below:

Correct Answer: D. (A) is false, but (R) is true

90. Given below are two statements:

Statement I: By bringing together the computational capability of microelectronics with the perception and control capabilities of microminiaturized sensors and actuators, MEMS technologies are enabling smart systems on a chip to be mass-produced.
Statement II: While considering IoТ deployment, data integrity and authenticity are no more security concerns at the sensor node level.
In light of the above statements, choose the correct answer from the options given below:

Correct Answer: C. Statement I is true, but Statement II is false