CUET PG Nanoelectronics 2025 Question Paper (Available): Download Question Paper with Answer Key And Solutions PDF

Determine the node voltages \( v_1 \) and \( v_2 \) for the given circuit:

• (1) \( v_1 = 10 \, V, v_2 = 20 \, V \)
• (2) \( v_1 = 20 \, V, v_2 = 10 \, V \)
• (3) \( v_1 = 20 \, V, v_2 = 20 \, V \)
• (4) \( v_1 = 10 \, V, v_2 = 10 \, V \)

Evaluate the mesh current \( i_1 \) in the given circuit:

• (1) \( i_1 = 0.132 \, A \)
• (2) \( i_1 = 1.132 \, A \)
• (3) \( i_1 = 1.05 \, A \)
• (4) \( i_1 = 0.105 \, A \)

In a circuit, the maximum power will be transferred only if the load resistance is equal to ...........

• (1) Source resistance (RS)
• (2) Thevenin's equivalent resistance (RT)
• (3) Four times of the source resistance (4RS)
• (4) Four times of the Thevenin's equivalent resistance (4RT)

Choose the correct statement from the options below:

• (1) Non-linear distortion is expected to be minimum in Single Side-band Suppressed Carrier (SSB-SC) systems and Amplitude Modulation (AM).
• (2) The AM system has a suppressed carrier system, which is cheaper than the performance point of view.
• (3) The receiver of a suppressed carrier system is simpler and cheaper than that of the AM system.
• (4) The AM system is always easier to analyze and more efficient.

The voltage across the inductor for \( t > 0 \) in the given circuit is:

• (1) \( v = 25e^{\gamma t} \, V \)
• (2) \( v = 25e^{-\gamma t} \, V \)
• (3) \( v = -25e^{\gamma t} \, V \)
• (4) \( v = -25e^{-\gamma t} \, V \)

Determine the Y11 and Y12 parameters for the circuit given below:

• (1) \( Y_{11} = 0.3 \, S, Y_{12} = -0.1 \, S \)
• (2) \( Y_{11} = 0.3 \, S, Y_{12} = 0.3 \, S \)
• (3) \( Y_{11} = -0.1 \, S, Y_{12} = 0.3 \, S \)
• (4) \( Y_{11} = -0.3 \, S, Y_{12} = 1.0 \, S \)

The product of maxterms for the given boolean function is: \[ Y = ab + a'c \]
Choose the correct answer from the options given below:

• (1) \( M_0, M_3, M_5, M_7 \)
• (2) \( M_1, M_3, M_5, M_7 \)
• (3) \( M_2, M_3, M_5, M_7 \)
• (4) \( M_1, M_2, M_5, M_7 \)

Characteristic equation (\( Q_{next} \)) is provided for the different flip-flops:

• (A) \( Q_{next} = S Q + R Q' \)
• (B) \( Q_{next} = S Q' + R Q \)
• (C) \( Q_{next} = T Q' + T' Q \)
• 
  Choose the correct answer from the options given below:
• (1) (A) and (D) only
• (2) (B) and (D) only
• (3) (A) and (C) only
• (4) (C) and (D) only

The number of flip-flops required to implement a MOD-31 counter are:

• (A) 25
• (B) 5
• (C) 12
• (D) 24

The output frequency for an 8-bit Johnson counter is ......... if the applied input frequency is 256 GHz.

• (A) 128 GHz
• (B) 64 GHz
• (C) 128 MHz
• (D) 256 MHz

Match List-I with List-II:

Choose the correct answer from the options given below:

• (1) (A) – (I), (B) – (II), (C) – (III), (D) – (IV)
• (2) (A) – (I), (B) – (III), (C) – (II), (D) – (IV)
• (3) (A) – (I), (B) – (II), (C) – (IV), (D) – (III)
• (4) (A) – (III), (B) – (I), (C) – (IV), (D) – (II)

The percentage of the total power carried by the sidebands of the AM wave for tone modulation when the modulation index is 0.3 is:

• (1) 30%
• (2) 4.3%
• (3) 43%
• (4) 3%

Match List-I with List-II:

Choose the correct answer from the options given below:

• (1) (A)–(I), (B)–(II), (C)–(III), (D)–(IV)
• (2) (A)–(IV), (B)–(III), (C)–(II), (D)–(I)
• (3) (A)–(III), (B)–(IV), (C)–(I), (D)–(II)
• (4) (A)–(I), (B)–(II), (C)–(IV), (D)–(III)

In amplitude modulation:

• (A) The envelope detector operates properly, only if \((1/f_c) \leq RC \leq (1/f_m)\)
• (B) Vestigial sideband modulation is used in television broadcasting.
• (C) Selective fading produces more distortion in SSB-SC systems than in DSB-SC.
• (D) Efficiency of a suppressed carrier system is 100%, whereas in AM the maximum efficiency is only 33.3%.
• 
  Choose the correct answer from the options given below:
• (1) (A), (B) and (D) only
• (2) (B) and (C) only
• (3) (A), (C) and (D) only
• (4) (B), (C) and (D) only

The transmission efficiency of an ordinary AM signal with a modulation percentage of 80% is:

• (1) 24.24%
• (2) 48.49%
• (3) 20.22%
• (4) 33.33%

Consider the following statements:

• (A) Built-in potential across a diode reduces with increase in temperature.
• (B) Electron concentration of n-type semiconductor equals intrinsic concentration at Curie temperature.
• (C) Drain current of MOSFET is a positive temperature coefficient (PTC).
• (D) Collector current of BJT has a PTC.
• 
  Choose the correct statements:
• (1) (A), (B) and (D) only
• (2) (A), (B) and (C) only
• (3) (A), (B), (C) and (D)
• (4) (B), (C) and (D) only

In GaAsP, if \(E_g = 1.9 \, eV\), the emission wavelength is:

• (1) 7538 Å
• (2) 6538 Å
• (3) 6533 Å
• (4) 6133 Å

Match List-I with List-II:

Choose the correct answer from the options given below:

• (1) (A)–(I), (B)–(II), (C)–(III), (D)–(IV)
• (2) (A)–(IV), (B)–(I), (C)–(II), (D)–(III)
• (3) (A)–(III), (B)–(C), (C)–(IV), (D)–(I)
• (4) (A)–(III), (B)–(IV), (C)–(I), (D)–(II)

The consequences of Early effect on BJT are:

• (A) Effective base width reduces.
• (B) Emitter injection efficiency and base transport factor increase.
• (C) \(\alpha\) and \(\beta\) decrease.
• (D) Emitter injection efficiency and base transport factor decrease.
• 
  Choose the correct answer:
• (1) (A) and (B) only
• (2) (A), (B) and (C) only
• (3) (C) and (D) only
• (4) (B), (C) and (D) only

The DC collector current for a BJT with \(\alpha = 0.99\), \(I_B = 25 \, \mu A\) and \(I_{CBO} = 200 \, nA\) is:

• (1) 2.495 mA
• (2) 2.518 mA
• (3) 2.9 mA
• (4) 250 nA

Arrange the following devices in increasing order of their input resistances:

• (A) MOSFET
• (B) BJT
• (C) JFET
• (D) PN junction diode
• (1) (A), (B), (C), (D)
• (2) (A), (C), (B), (D)
• (3) (B), (A), (D), (C)
• (4) (B), (A), (C), (D)

Match List-I with List-II:

Choose the correct answer from the options given below:

• (1) (A) – (I), (B) – (II), (C) – (III), (D) – (IV)
• (2) (A) – (IV), (B) – (II), (C) – (III), (D) – (I)
• (3) (A) – (II), (B) – (III), (C) – (IV), (D) – (I)
• (4) (A) – (III), (B) – (IV), (C) – (II), (D) – (I)

Express \(v_{out}\) in terms of \(v_{in}\) for the given circuit, assuming the op-amp is ideal.

• (1) \( 1.2 v_{in} \)
• (2) \( v_{in} \)
• (3) \( 0.5 v_{in} \)
• (4) \( 4.0 \)

Considering the op-amp to be ideal, the \(v_{out}\) is expressed as:

• (1) \( 0.5(v_1 + v_2)(1 + \frac{R_2}{R_1}) \)
• (2) \( (v_1 + v_2)(1 + \frac{R_2}{R_1}) \)
• (3) \( 1.5(v_1 + v_2)(1 + \frac{R_2}{R_1}) \)
• (4) \( 0.5(v_1 - v_2)(1 + \frac{R_2}{R_1}) \)

Arrange the following fabrication steps of MOSFET from initials:

• (A) Metallization
• (B) Oxidation
• (C) Etching
• (D) Diffusion/Ion implantation

Choose the correct answer from the options given below:

• (1) (A), (B), (C), (D)
• (2) (B), (C), (A), (D)
• (3) (B), (A), (D), (C)
• (4) (B), (C), (D), (A)

The cutoff frequency of a first order low pass filter for \(R_1 = 1.2 \, k\Omega\) and \(C_1 = 0.02 \, \mu F\) is:

• (1) 1.86 kHz
• (2) 2.63 kHz
• (3) 6.63 kHz
• (4) 10.63 kHz

Match List-I with List-II:

Choose the correct answer from the options given below:

• (1) (A) – (III), (B) – (II), (C) – (I)
• (2) (A) – (I), (B) – (III), (C) – (II)
• (3) (A) – (II), (B) – (III), (C) – (I)
• (4) (A) – (III), (B) – (I), (C) – (II)

The unit of ratio of diffusion constant (D) and mobility (\(\mu\)) is:

• (1) cm\(^2\)/V-sec
• (2) Volts
• (3) cm\(^2\)/sec
• (4) A/m\(^2\)

A silicon crystal is doped with a group III element, the electron concentration falls below intrinsic concentration by a factor of \(10^6\), so the concentration of impurity present is:

• (1) \( 1.5 \times 10^{16} \, cm^{-3} \)
• (2) \( 1.5 \times 10^{10} \, cm^{-3} \)
• (3) \( 1.5 \times 10^{14} \, cm^{-3} \)
• (4) \( 2.25 \times 10^{14} \, cm^{-3} \)

Choose the wrong option from the following for the given statement.
Statement: Electric field is conservative.

• (1) curl to be identically zero.
• (2) potential difference between any two points is zero.
• (3) gradient of a scalar potential gives magnitude of electric field.
• (4) work done in a closed path inside the field is zero.

Choose the correct answer from the options given below.

A. \( \vec{\nabla} \times \vec{B} = \mu_0 \vec{J} \) represents Ampere's circuital law.
B. \( \vec{\nabla} \cdot \vec{B} = 0 \) represents magnetic monopole doesn't exist experimentally.
C. \( \vec{\nabla} \times \vec{E} = 0 \) represents the conservative nature of the electric field.
D. \( \vec{\nabla} \times \vec{A} = 0 \) represents the solenoidal condition for a vector field.

Choose the correct answer from the options given below:

• (1) (A), (B) and (D) only.
• (2) (A), (B) and (C) only.
• (3) (A), (B), (C) and (D).
• (4) (A), (C) and (D) only.

Match List-I with List-II

Choose the correct answer from the options given below:

• (1) (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
• (2) (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
• (3) (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
• (4) (A) - (II), (B) - (I), (C) - (III), (D) - (IV)

Gauss's law in magnetostatics is expressed as,

• (1) \( \oint \vec{B} \cdot d\vec{S} = 0 \)
• (2) \( \oint \vec{B} \cdot d\vec{I} = 0 \)
• (3) \( \oint \vec{B} \cdot \vec{n} dV = 0 \)
• (4) \( \oint \vec{B} \cdot d\vec{l} = \mu_0 I_{enc} \)

If in a free space, the electric field is given as: \[ \vec{E} = 20 \cos(\omega t - 50x) \hat{y} \, V/m \]
then, the expression of displacement current density \( J_d \) is:

• (1) \( -20 \omega \epsilon_0 \cos(\omega t - 50x) \hat{y} \, A/m^2 \)
• (2) \( -20 \omega \epsilon_0 \sin(\omega t - 50x) \hat{y} \, A/m^2 \)
• (3) \( -10 \omega \epsilon_0 \sin(\omega t - 50x) \hat{y} \, A/m^2 \)
• (4) \( -20 \omega \sin(\omega t - 50x) \hat{y} \, A/m^2 \)

If electric \( \vec{E}(r,t) \) and magnetic \( \vec{B}(r,t) \) fields are defined as \[ \vec{E}(r,t) = \vec{E}_0 e^{i(k \cdot r - \omega t)} \hat{n}, \quad \vec{B}(r,t) = \frac{1}{c} \hat{k} \times \vec{E}(r,t) \]
where \( k \) is the propagation vector and \( \hat{n} \) is the polarization vector. E and B are transverse in nature, if they satisfy which of the following conditions?

• (1) \( \hat{n} \times k = 0 \)
• (2) \( \hat{n} \cdot k = 0 \)
• (3) \( \hat{n} \times \hat{k} = 0 \)
• (4) \( k \cdot r = 0 \)

The characteristic length scale of nanomaterials is:

• (1) 1-100 nm
• (2) 1-500 nm
• (3) 1-200 nm
• (4) 1-300 nm

Match List-I with List-II

Choose the correct answer from the options given below:

• (1) (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
• (2) (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (3) (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
• (4) (A) - (II), (B) - (I), (C) - (III), (D) - (IV)

If the diameter of the chiral carbon nanotubes increases, then

• (1) the band gap of semiconducting chiral carbon nanotubes decreases linearly
• (2) the band gap of semiconducting chiral carbon nanotubes increases linearly
• (3) the band gap of semiconducting chiral carbon nanotubes decreases exponentially
• (4) the band gap of semiconducting chiral carbon nanotubes increases exponentially

The Extreme Ultraviolet (EUV) lithography employs .......... wavelength.

• (1) 13.5 nm
• (2) 53.5 nm
• (3) 100 nm
• (4) 50 nm

Attenuation in optical fibre can be measured in:

• (1) KdB/m
• (2) dB/m
• (3) dB/km
• (4) dB/mm

........... nanoparticles are extraordinarily efficient for clinical diagnostic purposes as they give strong signatures in optical absorption, fluorescence spectroscopy, X-Ray diffraction, and electrical conductivity.

• (1) Silver
• (2) Copper
• (3) Gold
• (4) Iron

Bio-functionalization of magnetic nanoparticles has been extensively used for the development of biosensors such as:

• (1) Fe₃O₄
• (2) ZnO
• (3) C₅O₂H₈
• (4) GaAs

A multiplexer (MUX)

• (A) is a parallel to serial converter
• (B) is also known as data distributor
• (C) can be used as a logic function generator
• (D) switch the data from several lines to one line
  
  Choose the correct answer from the options given below:
• (1) (A), (B), (C) and (D)
• (2) (A), (B) and (D) only
• (3) (B), (C) and (D) only
• (4) (A), (C) and (D) only

A 32:1 Mux can be designed using:

• (1) two 16:1 Muxs and one two-input OR gate
• (2) two 16:1 Muxs and one two-input AND gate
• (3) two 16:1 Muxs and one two-input NOR gate
• (4) two 16:1 Muxs only

In the first window of optical fibre, light sources are generally:

• (1) GaAlP
• (2) GaAlBr
• (3) GaAlAs
• (4) GeAlAs

Following statements are given in reference to 8085 Microprocessor:

• (A) Its memory size is 64 KB
• (B) It is a 40-pin IC
• (C) Its clock frequency lies between 3 to 5 MHz
• (D) It has 16 bit of each data and address lines.
• 
  Choose the correct answer from the options given below:
• (1) (A), (B) and (D) only
• (2) (A), (B) and (C) only
• (3) (A), (B), (C) and (D)
• (4) (B), (C) and (D) only

Fibre optic sensors may be classified into three categories. Choose the incorrect option.

• (1) Intensity-modulated sensors
• (2) Phase sensors
• (3) Diffraction sensors
• (4) Conducting sensors

Which of the following is the most appropriate transmission frequency in optical fibre?

• (1) \(10^9\) Hz
• (2) \(10^{11}\) Hz
• (3) \(10^{14}\) Hz
• (4) \(10^4\) Hz

Which part of optical fibre has a higher refractive index:

• (1) Core
• (2) Cladding
• (3) Seath
• (4) Both Cladding and Seath

Match List-I with List-II

Choose the correct answer from the options given below:

• (1) (A) = (I), (B) = (II), (C) = (III), (D) = (IV)
• (2) (A) = (III), (B) = (IV), (C) = (I), (D) = (II)
• (3) (A) = (I), (B) = (II), (C) = (IV), (D) = (III)
• (4) (A) = (III), (B) = (IV), (C) = (II), (D) = (I)

(A) MOV A, C is a one-byte instruction.
(B) OUT 03 H is a two-byte instruction.
(C) ANI 76 H is a three-byte instruction.
(D) STA 3000 H is a three-byte instruction.

Choose the correct answer from the options given below:

• (1) (A), (B), and (D) only
• (2) (A), (B), and (C) only
• (3) (A), (B), (C), and (D)
• (4) (B), (C), and (D) only

Which of the following statements about hydrogen peroxide is INCORRECT?

• (1) It is a chemical threat agent as its excessive concentration as a product of industry and from atomic power stations affects the environment.
• (2) It can not be used for the disinfection of water pools, food, and beverage packages as it is a chemical threat agent.
• (3) It is the most valuable marker for oxidative stress and recognized as one of the major risk factors in the progression of disease-related pathophysiological complications in diabetes.
• (4) It is the most valuable marker for inflammatory processes and a mediator for apoptotic cell death.

Match List-I with List-II

Choose the correct answer from the options given below:

• (1) (A) = (I), (B) = (II), (C) = (III), (D) = (IV)
• (2) (A) = (III), (B) = (IV), (C) = (I), (D) = (II)
• (3) (A) = (IV), (B) = (III), (C) = (II), (D) = (I)
• (4) (A) = (II), (B) = (I), (C) = (IV), (D) = (III)

............ refers to the inability to faithfully repeat recorded data output when measuring a range of values and scanning from different directions.

• (1) Selectivity
• (2) Resolution
• (3) Hysteresis
• (4) Detection limit

........ is the vector address of the TRAP interrupt.

• (1) 003C H
• (2) 0024 H
• (3) 002C H
• (4) 0034 H

What is the word length of an 8-bit microprocessor?

• (1) 16 bit
• (2) 32 bit
• (3) 8 bit
• (4) may vary in between 8 bit to 32 bit

To expand a 4-bit parallel adder to an 8-bit parallel adder, we can

• (A) use two 4-bit adders and connect the sum output of one to the input bit of the other
• (B) use four 4-bit adders with no interconnections
• (C) use two 4-bit adders with the carry output of one connected to the carry input of the other
• (D) use eight 4-bit adders with no interconnections
• Choose the correct answer from the options given below:
• (1) (A), (C) only
• (2) (B), (D) only
• (3) (A) only
• (4) (C) only

Which of the following statement(s) about Digital-to-Analog (DAC) converter is/are correct?

• (A) DAC is said to be monotonic if its output decreases as the binary input is incremented from one value to the next.
• (B) Ideally, the output of a DAC should be zero when the binary input is zero.
• (C) The operating speed of a DAC is usually specified by giving its settling time.
• (D) Resolution is the reciprocal of the number of discrete steps in the full-scale output of the DAC.
• Choose the correct answer from the options given below:
• (1) (A), (B), and (D) only
• (2) (A), (B), and (C) only
• (3) (A), (B), (C), and (D)
• (4) (B), (C), and (D) only

Major problems with the large-scale utilization of carbon nanotubes

• (A) synthesis in pure forms
• (B) dispersion in solvents
• (C) reducing their length
• (D) tailoring into a desired orientation

Choose the correct answer from the options given below:

• (1) (A), (B), and (D) only
• (2) (A), (B), and (C) only
• (3) (A), (B), (C), and (D)
• (4) (B), (C), and (D) only

Match List-I with List-II

Choose the correct answer from the options given below:

• (1) (A) - (I), (B) - (III), (C) - (II), (D) - (IV)
• (2) (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
• (3) (A) - (I), (B) - (III), (C) - (IV), (D) - (II)
• (4) (A) - (II), (B) - (IV), (C) - (I), (D) - (III)

In nanomaterials production, according to Aufbau principle the self-assembly of complicated structures takes place in a hierarchical fashion in the following sequence:

• (A) the linear chains are bundled to form two-dimensional monolayers
• (B) single molecules join up to form linear chains
• (C) a finite number of independent molecules
• (D) the two-dimensional monolayers are stacked to form the final three-dimensional crystal
• 
  Choose the correct answer from the options given below:
• (1) (A) - (B), (C) - (D)
• (2) (A) - (C), (B) - (D)
• (3) (B) - (A), (C) - (D)
• (4) (C) - (B), (A) - (D)

The number of cubes of each side 1 nm and the collective surface area that can be carved out from a cube with each side of 1 m are respectively:

• (1) \( 1 \times 10^{27} \) and 6000 km²
• (2) \( 1 \times 10^{27} \) and 600 km²
• (3) \( 1 \times 10^{25} \) and 5000 km²
• (4) \( 1 \times 10^{27} \) and 500 km²

The process of transferring a pattern into a reactive polymer film which will subsequently be used to replicate that pattern into an underlying thin film is called:

• (1) Electrochemical Deposition
• (2) Lithography
• (3) Mechanical Exfoliation
• (4) Electroless Deposition

The process of synthesizing large polymer molecules is:

• (1) top-down approach
• (2) bottom-up approach
• (3) spontaneous process
• (4) forced process

Match List-I with List-II

Choose the correct answer from the options below:

• (1) (A) = (I), (B) = (II), (C) = (IV), (D) = (III)
• (2) (A) = (II), (B) = (III), (C) = (I), (D) = (IV)
• (3) (A) = (I), (B) = (III), (C) = (IV), (D) = (II)
• (4) (A) = (III), (B) = (IV), (C) = (II), (D) = (I)

The process of transferring growth species from a source or target and depositing them on a substrate to form a film is called:

• (1) Molecular Beam Epitaxy
• (2) Physical Vapor Deposition
• (3) Chemical Vapor Deposition
• (4) Atomic Layer Deposition

In X-ray diffraction, a collimated beam of X-rays, with most appropriate wavelength ranging from .......... is incident on a specimen and is diffracted by the crystalline phases of the specimen:

• (1) 0.1 to 2 Å
• (2) 5 to 10 Å
• (3) 10 to 20 Å
• (4) 20 to 30 Å

........... are electromagnetic radiation with typical photon energies in the range of 100 eV to 100 keV:

• (1) X-rays
• (2) Infrared rays
• (3) Optical spectroscopy
• (4) Raman spectroscopy

Measurement of grain size by using X-ray diffraction line broadening can be done by:

• (1) Bragg’s Law
• (2) Debye-Scherrer Formula
• (3) Total Internal Reflection
• (4) Moseley Law

Quantum well lasers were first fabricated using the ............ material systems.

• (1) InGaAsN/GaAs
• (2) GaAs/AlGaAs
• (3) InGaAsP/InP
• (4) GaAs/InP

The measurement of Nitric Oxide (NO) is quite difficult due to its ........ half-life and ........ reactivity with other biological components such as superoxide, oxygen, thiols.

• (1) Short, High
• (2) Short, Low
• (3) Long, High
• (4) Long, Low

In the ISFET pH measurement system, the voltage circuit has ........ impedance and the current circuit has ......... impedance.

• (1) High, Low
• (2) zero, High
• (3) Low, zero
• (4) Low, High

.......... type of electrochemical detection measures the electric current associated with the electron transfer involved in redox processes whereas ............ type of electrochemical detection measures conductance or capacitance changes associated with changes in the overall ionic medium between the two electrodes.

• (1) Amperometry, potentiometry
• (2) Potentiometry, impedance spectroscopy
• (3) Amperometry, impedance spectroscopy
• (4) Potentiometry, amperometry

Which of the following statements is incorrect about Light-addressable potentiometric sensors (LAPS)?

• (1) In the LAPS with EIS structure, a semiconductor substrate (silicon) is covered with an insulator (SiO2).
• (2) An enzyme deposited on the LAPS surface allows one to observe the spatial distribution of a specific substrate.
• (3) In the LAPS with electrolyte-insulator-semiconductor (EIS) structure, a semiconductor substrate (silicon) is covered with an insulator (SiO2).
• (4) A sensing ion-selective layer, for instance, pH-sensitive S3N4, is deposited on the bottom of the insulator.