1. In a degenerate n-type semiconductor the fermilevel lies

(A)within the conduction band

(B)below the conduction band

(C)within the valance band

(D)above the valance band



2. The threshold voltage of enhancement mode MOSFET can be adjusted by adjusting the

(A)channel doping

(B)channel length

(C)source doping

(D)drain doping



3. The Laplace transform e-at is 11



a







4. Norton theorem deals with the equivalent

(A)voltage source

(B)power source

(C)current source

(D)light source



5. In a PLL, lock occurs when the

(A)input frequency and the VCO frequency are the same

(B)phase error is 180°

(C)VCO frequency is double the input frequency

(D)phase error is 90°



6. CMRR (Common Mode Rejection Ratio) for a differential amplifier should be

(A)zero

unity

(C)small

large



7. Sequential circuits are essentially

(A)Asynchronous circuits

(B)Astable multivibrators

(C)Schmitt trigger

(D)Synchronous circuits



8. Multiplexers are also used to realize

(A)Input function to amplifier

(B)Boolean function

(C)Up-down counter

(D)Memories



9. Which instruction of 8086 will not execute

(A)MOV DS, 1234 H

(B)MOV SP, 1234 H

(C)MOV AX, 1234 H

(D)MOV SI, 1234 H



10. The HL pair of 8085 microprocessor is loaded with 0505 H. The HL pair is decremented to 000H. Which flag will be affected

flag

flag

flag is affected

flag



11. What places limit on the largest and the smallest integer values in a program

(A)Language used

(B)Compiler

(C)CPU

(D)Size of the operator



12. Which is not an infinite loop

(A)for

(B)while

x x go to loop;

(D)while



13. The complex poynting vector can be defined as



14. The intrinsic impedance of free space can be defined by



15. The value of numerical aperture in fiber optic communication system is equal to

(A)zero

1



1



16. Which of the following produces amplitude and phase modulation both

(A)PSK

QPSK

(C)FSK

QAM



17. Which of the following transducer has the largest linearity

(A)RTD

(B)Thermistor

sensor

(D)Thermo couple



18. In negative feed back control system, the output amplitude is than in open loop control system.

(A)always reduced

(B)always increased

(C)never reduced

(D)never increased



19. Which of the following physical parameter can be measured by LVDT

(A)Displacement

(B)Velocity

(C)Acceleration

(D)Pressure



20. The transfer function of a control system is applicable to which of the following

(A)Linear and time-invariant systems

(B)Linear and time-variant systems

(C)Non-linear and time-variant systems

(D)Non-linear and time-invariant systems






21. Assertion JFET is used in automatic gain control circuits.

Reason Its variable voltage register property helps gain control.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.


22. Assertion Superposition theorem can be used to determine the output of a full-wave rectifier whose inputs are sinusoidal signal sources of different frequencies connected in series.

Reason Superposition theorem holds good for all linear systems.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.


23. Assertion Operational amplifiers have a high slew rate for good transient response.
Reason Slew rate is the maximum rate of change of the output voltage of the operational amplifier when a large amplitude step is applied to its input.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.

24. Assertion NAND gate is a universal building block.
Reason De Morgan's theorem provides inter conversion of gates.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.

25. Assertion 8051 is a Boolean processor.
Reason There are no bit manipulation instructions in 8051.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.

26. Assertion statement is; int value 55.
Reason The value 55 is assigned to variable value.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.

27. Assertion Radio and television receivers are generally of the superheterodyne type.
Reason Wireless communication is possible by receiving signals through super heterodype receivers.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.

28. Assertion IR lasers are used for long haul transmission operating around at 193 THz.
Reason The line width of the semiconductor lasers are of the order of fraction of nm.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.

29. Assertion Thyristors are preferred to power diodes in variable power rectifiers.
Reason Thyristors provide controlled rectification and also the power loss in them is less compared to that in power diodes.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.

30. Assertion The transient performance of a feedback control system is normally analysed by using a unit-step function as the reference input.
Reason Unit step function is the most common input found in practice.

The above items consist of two statements, one labelled the "Assertion and the other labelled the "Reason You are to examine these two statements carefully and decide if the Assertion and the Reason are individually true and if so, whether the Reason is a correct explanation of the Assertion. Select your answers to these items using the codes given below and mark your answer accordingly.

Codes

(A)Both and are true and is the correct explanation of

(B)Both and are true, but is not correct explanation of

is true, but is false.

is false, but is true.

31. What is the correct sequence of the following step in the fabrication step of a monolithic, bipolar junction transistor
Emitter diffusion
Base diffusion
Buried layer formation
4)Epi-layer formation Select the correct sequence using the codes given below

Codes










32. The following logic families are written
TTL DTL
CMOS ECL
The order in which the propagation delay increases is










33. Given below is a list of transducers
RTD

Thermocouple

IC sensor

4)Thermistor The order in which the temperature range sensed increases











34. Following are the frequency bands
1) e x
3)k 4)ku

Arrange them in increasing frequency order










35. For a closed loop system, the roots of the characteristic equation yields

1)Negative real repetitive roots in critically damped case.

2)Positive roots in negatively damped case and response diverges out.

3)Real negative roots in over damped case.

4)Sustained oscillations.

Select the correct sequence which takes the system from stable to unstable state, using the codes given below











36. List- I List- II
Reference junction voltage diode

(b)Zener Pinch-off diode

(c)MOSFET Negative resistance

(d)Tunnel Diffusion diode


Codes










37. List- I List- II
(a)Laplace Voltage sources

(b)Poles on Frequency imaginary response axis

(c)Thevenin's Oscillatory Theorem

(d)Bode plots Transient analysis


Codes










38. List- I List- II
(a)Schmitt Linear wave trigger shaping

(b)Clipping Hysteresis

(c)Op-amp Barkhausen Criterion

(d)Oscillators Slew rate


Codes










39. List- I List- II
flip-flop Parallel output

(b)Serial in Octate parallel out

(c)Combination Race logic around

Flip-flop


Codes




(iii)





40. List- I List- II
(a)8086 Timer

(b)8051 6-byte Que

(c)8155 Accumulator clear

(d)Zero flag ports


Codes


(iii)







41. List- I List- II
(a)main Object oriented programming

(b)return Syntax error

Program execution start

(d)print ("my name") Invalid statement


Codes
(iii)









42. List- I List- II
(a)SCR bilateral

(b)UJT dc to ac

(c)Triac intrinsic stand off ratio

(d)Inverter holding current


Codes
(iii)









43. List- I List- II
(a)Single Mode Population Fiber inversion

(b)DWDM Isolator

(c)Optocoupler 0.1 nm

(d)LASER V 2.405


Codes










44. List- I List- II



Codes










45. List- I List- II
(a)Single Mode detector Fiber

(b)Polarized Mode Dispersion transmitter

(c)photo diode (iii)Ps/root(km)

(d)LED 0.2 dB/km



Codes










46. Read the paragraph and answer the questions 46 to 50. Two-port networks A two port network consists of one input port and one output port The port variables are currents and voltages. Any external network connected either at the input or at the output port is called termination. The number of equations to describe relationship amongst the port
voltages and currents for an n-port network will be n with 2n variables.



For a two-port network the four variables are V1, I1 at the input port
and V2,I2 at the output port. Only two out of these four variables are independent.
Study of two-port network is important in synthesizing and designing networks like filters, matching networks, wave shaping networks transmission lines and many more.
The two port parameters include
1)Open circuit impedance Z-parameters.

2)Short circuit admittance Y-parameters.

3)Transmission or Chain ABCD parameters.

Inverse transmission parameters.

Hybrid i.e. h-parameters and

Inverse hybrid g-parameters. The Z-parameters evaluated from



Furnish information about input driving point impedance forward transfer impedance with output port open and
reverse transfer impedance with input open circulated

The equations for Z-parameters lead to equivalent circuit are as follows A network becomes reciprocal when Zand symmetrical when




h and transmission parameters are related to each other. Relation of Z and h parameters is of the following type


1) Which parameters are useful to construct a model for transistor



Y



g


h-parameter representation is the dual of parameter representation

(A)ABCD

g



Z



3)For a two port network the Z-parameters are


Z and Y-parameters are related. If Z parameters are known Y-parameters can be evaluated. Why Z and Y parameters are separately defined

(A)for academic reason

(B)Y-parameters are difficult to evaluate.

(C)Z-parameters cannot be evaluated at high frequency due to open circuit condition.

parameters cannot be evaluated from Z parameters and vice-a-versa.


For a two port-network given below what are its Z-parameters