UGC NET 2025 Electronic Science Question Paper (07-Jan-2026) (Shift 2)

Question 1

Arrange the following semiconductor devices in decreasing order of operating speed (frequency) A. IGBT B. MOSFET C. Power BJT D. SCR Choose the correct answer from the options given below:

Accepted Answer

B, A, C, D

Answer

A, B, C, D

Answer

D, C, B, A

Answer

A, B, D, C

Question 2

Match the LIST-I with LIST-IILIST-ILIST-IIA. $
abla \cdot \bar{D} = ho_v$I. $\oint_S \bar{D} \cdot d\bar{s} = \int_V ho_v dv$B. $
abla \cdot \bar{B} = 0$II. $\oint_S \bar{B} \cdot d\bar{s} = 0$C. $
abla 	imes \bar{E} = -\frac{\partial \bar{B}}{\partial t}$III. $\oint_L \bar{E} \cdot d\bar{l} = -\frac{\partial}{\partial t} \int_S \bar{B} \cdot d\bar{s}$D. $
abla 	imes \bar{H} = \bar{J} + \frac{\partial \bar{D}}{\partial t}$IV. $\oint_L \bar{H} \cdot d\bar{l} = \int_S (J + \frac{\partial \bar{D}}{\partial t}) \cdot d\bar{s}$Choose the correct answer from the options given below:

Accepted Answer

A-I, B-II, C-III, D-IV

Answer

A-IV, B-I, C-II, D-III

Answer

A-III, B-IV, C-I, D-II

Answer

A-II, B-III, C-IV, D-I

Question 3

Arrange the given region of operation of transistors in CMOS inverter when input voltage V$_{in}$ is swept from 0V to V$_{DD}$. A. NMOS in cut-off, PMOS in linear region B. NMOS in saturation, PMOS in linear region C. NMOS in saturation PMOS in saturation region D. NMOS in linear, PMOS in saturation region E. NMOS in linear, PMOS in cutoff region Choose the correct answer from the options given below:

Accepted Answer

A, B, C, D, E

Answer

A, D, E, B, C

Answer

A, D, C, E, B

Answer

C, D, E, B, A

Question 4

In CRO, if the signal of $12\mu s$ risetime is observed as the signal with $15\mu s$ rise time. Calculate the value of bandwidth of CRO, if the value of K is 0.35

Accepted Answer

39 KHz

Answer

36 KHz

Answer

42 KHz

Answer

45 KHz

Question 5

The 8086 has 2-byte of flag register, where the lower byte of flag register is same as of 8085 and the upper byte has only 4 used bits. Arrange these flags according to their place in the flag register from left to right. A. Overflow flag - O B. Directional flag - D C. Interrupt enable flag - I D. Trap flag - T Choose the correct answer from the options given below:

Accepted Answer

A, B, C, D

Answer

D, C, B, A

Answer

A, C, D, B

Answer

D, B, A, C

UGC NET 2025 Electronic Science Question Paper (07-Jan-2026) (Shift 2)

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LIST-I	LIST-II
A. $\nabla \cdot \bar{D} = \rho_v$	I. $\oint_S \bar{D} \cdot d\bar{s} = \int_V \rho_v dv$
B. $\nabla \cdot \bar{B} = 0$	II. $\oint_S \bar{B} \cdot d\bar{s} = 0$
C. $\nabla \times \bar{E} = -\frac{\partial \bar{B}}{\partial t}$	III. $\oint_L \bar{E} \cdot d\bar{l} = -\frac{\partial}{\partial t} \int_S \bar{B} \cdot d\bar{s}$
D. $\nabla \times \bar{H} = \bar{J} + \frac{\partial \bar{D}}{\partial t}$	IV. $\oint_L \bar{H} \cdot d\bar{l} = \int_S (J + \frac{\partial \bar{D}}{\partial t}) \cdot d\bar{s}$