List of top Nanoelectronics Questions

Match List - I with List - II.

List - IList - II
A. ROM
B. EPROM
C. EEPROM
D. SRAM		I. Volatile, Fast, Expensive
II. UV erasable
III. Electrically erasable
IV. Non-Volatile, permanent data

The most fundamental physical principle that allows light to be transmitted along the optical fiber without significant loss :

Match List - I with List - II.

List - IList - II
A. Address bus
B. Data bus
C. Control bus
D. Tristate logic		I. Carries read/write signals, timing signals, and interrupt signals
II. A three-state output that can be high, low, or high-impedance
III. Unidirectional lines used by CPU to point to a memory location or I/O device
IV. Bidirectional lines used for transferring data between CPU and memory

The content of register (B) and register (C) of 8085 microprocessor are 0AFH and 0BH. It is desired to multiply the content of register B and register C and store the results in accumulator. A part of 8085 program for this purpose is given as : \[ \texttt{MVI A,00H} \] \[ \texttt{LOOP : _________} \] \[ \texttt{_________} \] \[ \texttt{_________} \] \[ \texttt{HLT} \] A sequence of instructions to complete the program would be :
The sequence of steps performed by microprocessor to fetch the data byte from memory :
• [A.] The byte is placed in the instruction decoder of the microprocessor.
• [B.] The byte from the memory location is placed on data bus.
• [C.] The control unit sends the control signal RD to enable the memory chip.
• [D.] Bus microprocessor places the 16-bit memory address from program counter on the address bus. Choose the correct answer from the options given below :
In 8085 microprocessor, which of the following are 2-byte instructions ?
• [A.] MOV C, A
• [B.] MVI A, 32H
• [C.] LDA 2050H
• [D.] JMP 2085H
• [E.] ADD B Choose the correct answer from the options given below :
Sequence of steps in 8085 microprocessor interrupt execution :
• [A.] Interrupt acknowledged
• [B.] Program content saved
• [C.] Control transferred to ISR
• [D.] Interrupt vector is read Choose the correct answer from the options given below :
Consider the following statements regarding the 8085 microprocessor :
• [A.] The 8085 is an 8-bit microprocessor.
• [B.] It has a 16-bit address bus, allowing it to access 64 KB of memory.
• [C.] It has 40 pins.
• [D.] It uses a multiplexed address/data bus. Choose the correct answer from the options given below :

Match List - I with List - II (Value of reflection coefficient).

List - IList - II
A. Short circuit
B. Open circuit
C. Line characteristic impedance
D. 2 times of line characteristic impedance		I. 0
II. -1
III. +1
IV. +\dfrac{1}{3}

In the 8085 microprocessor, the RST6 instruction transfers the program execution to the following location :
The 8085 uses which technique for memory and I/O access ?
In a microprocessor, the register which holds the address of the next instruction to be fetched is :
If 8085 microprocessor adds 87H and 79H, then :
Consider the following statements regarding a plane wave propagating through free space. The direction of field :
• [A.] \(\vec{E}\) is perpendicular to the direction of propagation.
• [B.] \(\vec{H}\) is perpendicular to the direction of propagation.
• [C.] \(\vec{E}\) is perpendicular to the direction of field \(\vec{H}\). Choose the correct answer from the options given below :
Coulomb's law states that the force between two point charges \(Q_1\) and \(Q_2\) is :
• [A.] Along the line joining them.
• [B.] Directly proportional to the product of charges \(Q_1\) and \(Q_2\).
• [C.] Inversely proportional to the distance \(R\) between them.
• [D.] Inversely proportional to the square of distance \(R\) between them. Choose the correct answer from the options given below :

Match List - I with List - II.

List - IList - II
A. \(\nabla \cdot \vec{D}=\rho\)
B. \(\nabla \cdot \vec{B}=0\)
C. \(\nabla \times \vec{E}=-\dfrac{\partial \vec{B}}{\partial t}\)
D. \(\nabla \times \vec{H}=\vec{J}+\dfrac{\partial \vec{D}}{\partial t}\)		I. Faraday's law of electromagnetic induction
II. Ampere-Maxwell law
III. Absence of magnetic monopoles
IV. Gauss's law of electricity

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Time varying electric field produces magnetic fields. Reason (R): Time varying magnetic field produces electric fields. In the light of the above statements, choose the most appropriate answer from the options given below :
Correct sequence of electromagnetic radiation in order of increasing frequency.
• [A.] Microwave
• [B.] Radio wave
• [C.] Visible light
• [D.] X-ray
• [E.] Gamma rays Choose the correct answer from the options given below :
A TEM wave impinges obliquely on a dielectric-dielectric boundary with \(\epsilon_{r1}=2\) and \(\epsilon_{r2}=1\). The angle of incidence for total reflection is :
The electric field of an electromagnetic wave propagating in the positive \(z\)-direction is given by : \[ \vec{E}=\hat{a}_x \sin(\omega t-\beta z)+\hat{a}_y \sin\left(\omega t-\beta z+\frac{\pi}{2}\right) \] The wave is :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Net charge within a conductor is always zero. Reason (R): The conductor has a very large number of free electrons. In the light of the above statements, choose the most appropriate answer from the options given below :
Medium 1 has the electrical permittivity \(\epsilon_1=1.5\) farad/m and occupies the region to the left of \(x=0\) plane. Medium 2 has the electrical permittivity \(\epsilon_2=2.5\) farad/m and occupies the region to the right of \(x=0\) plane. If in medium 1 \[ \vec{E}_1=(2u_x-3u_y+1u_z)\ \text{Volt/m} \] then \(\vec{E}_2\) in medium 2 is :
As frequency increases, the surface resistance of a metal :
The VSWR can have any value between :

Match List-I with List-II.

List-IList-II
A. Z-parameters
B. Y-parameters
C. h-parameters
D. ABCD-parameters		I. Short circuit admittance
II. Open circuit impedance
III. Hybrid parameters
IV. Transmission parameters