MES Jr. Grade • Paper-I
FET has offset voltage of about
A)
0.2 V
B)
1.1 V
C)
0.6 V
D)
0 V
Based on established principles in the relevant subject area, the correct and most appropriate choice is '0 V' (Option D).
MES Jr. Grade • Paper-I
In CMOS logic circuit the n-MOS transistor acts as:
A)
Load
B)
Pull up network
C)
Pull down network
D)
Not used in CMOS circuits
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Not used in CMOS circuits' (Option D).
MES Jr. Grade • Paper-I
For a linear system y = f(x) find the valid points
A)
f[x(t+T)]=f[x(t)]+f[x(T)]
B)
f(kx)=kf(x)
C)
f(x1 + x2) = f(x1) + f(x2)
D)
All are correct
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'f(x1 + x2) = f(x1) + f(x2)' (Option C).
MES Jr. Grade • Paper-I
A continuous time system with impulse response h(t) = e^at u(t) is stable and casual when
A)
Stable for a < 0
B)
Casual for all a
C)
Stable for all a and casual for a = 0
D)
Stable for a = 5 and casual for a < 0
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Casual for all a' (Option B).
MES Jr. Grade • Paper-I
When both nMOS and pMOS transistors of CMOS logic design are in OFF condition, the output is:
A)
1 or VDD or HIGH state
B)
0 or ground or LOW state
C)
High impedance or floating (Z)
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '0 or ground or LOW state' (Option B).
MES Jr. Grade • Paper-I
Z-transform of [ax(n) + by(n)] is
A)
ax(n) – by(n)
B)
ax(n) – y(n)
C)
ax(n) + by(n)
D)
x(n) – by(n)
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'ax(n) – y(n)' (Option B).
MES Jr. Grade • Paper-I
The unit of thermal resistance of a semiconductor device is
A)
Ohms
B)
Ohms/°C
C)
°C/Ohm
D)
°C/Watt
Based on established principles in the relevant subject area, the correct and most appropriate choice is '°C/Watt' (Option D).
MES Jr. Grade • Paper-I
The device possessing the highest photosensitivity is a
A)
Photoconductive cell
B)
Photovoltaic cell
C)
Photodiode
D)
Phototransistor
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Phototransistor' (Option D).
MES Jr. Grade • Paper-I
The photoconductive cells most popularly used for visible light spectrum uses
A)
Ge
B)
Si
C)
GaAs
D)
CdS
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Si' (Option B).
MES Jr. Grade • Paper-I
The type of bypass capacitor that work best at high frequency is
A)
Electrolytic
B)
Mica
C)
Ceramic
D)
Plexiglass
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Electrolytic' (Option A).
MES Jr. Grade • Paper-I
Fourier transform of f(t) = d(t) is
A)
1/w
B)
1/w^2
C)
1
D)
1 - 1/w^2
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is '1 - 1/w^2' (Option D).
MES Jr. Grade • Paper-I
If F(w) be the Fourier transform of f(t), then Fourier transform of f(t-a) is
A)
F(w)e^-jwa
B)
F(w)e^jwa
C)
aF(w)e^jwa
D)
F(w)e^-jwa
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'F(w)e^jwa' (Option B).
MES Jr. Grade • Paper-I
If alpha = 0.995, IC = 10 mA and ICEO = 0.5 mA, then ICE will be
A)
100 mA
B)
200 mA
C)
300 mA
D)
400 mA
Based on established principles in the relevant subject area, the correct and most appropriate choice is '100 mA' (Option A).
MES Jr. Grade • Paper-I
Hall effect device can be used to
A)
Multiply two signals
B)
Divide one signal by another on an instantaneous basis
C)
Add two signals
D)
Subtract one signal from another
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Divide one signal by another on an instantaneous basis' (Option B).
MES Jr. Grade • Paper-I
The system y(t) = 3x(t) + 4 is
A)
Linear system
B)
Non-linear system
C)
Partly (a) and partly (b)
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'Partly (a) and partly (b)' (Option C).
MES Jr. Grade • Paper-III
The basic principle of operation of klystrons is
A)
Resonance
B)
Degenerative feedback
C)
Velocity modulation
D)
Negative resistance
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Resonance' (Option A).
MES Jr. Grade • Paper-III
Which modulator is an indirect way of generating FM?
A)
Reactance FET
B)
Varactor diode
C)
Armstrong
D)
Reactance bipolar transistor
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Reactance FET' (Option A).
MES Jr. Grade • Paper-III
The dominant mode in rectangular waveguide is
A)
TE 10
B)
TE 11
C)
TE 12
D)
TE 20
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'TE 11' (Option B).
MES Jr. Grade • Paper-III
Setting contents of a microprocessor to zero can be efficiently done by
A)
MOV Immediate instruction using zero as immediate data
B)
AND Immediate instruction using zero as immediate data
C)
XORing register with itself
D)
None of these
Based on established principles in Electrical / Electronics Engineering, the correct and most appropriate choice is 'None of these' (Option D).
MES Jr. Grade • Paper-III
The standard IF value for FM receivers is
A)
10.7 MHz
B)
110.7 MHz
C)
400 MHz
D)
500 MHz
Option A: 10.7 MHz. The result follows from the standard engineering relationship for the stated conditions.
MES Jr. Grade • Paper-III
Gunn domains start near
A)
Cathode region
B)
Anode region
C)
Middle of the diode
D)
Start of the diode
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Start of the diode' (Option D).
MES Jr. Grade • Paper-III
An 8085 assembly language program is given below. Assume that the carry flag is initially unset. The content of the accumulator after the execution of the program is: MVI A, 07H; RLC; MOV B, A; RLC; RLC; ADD B; RRC
A)
8C H
B)
64 H
C)
15 H
D)
23 H
Starting with 07H, RLC gives 0EH, then the next two RLC operations give 1CH and 38H; adding B=0EH gives 46H and RRC gives 23H.
MES Jr. Grade • Paper-III
In an 8085 microprocessor, the instruction CMP B has been executed while the content of the accumulator is less than of register B. As a result
A)
Carry flag will be set but Zero flag will be reset
B)
Carry flag will be reset but Zero flag will be set
C)
Both Carry flag and Zero flag will be reset
D)
Both Carry flag and Zero flag will be set
Option A: Carry flag will be set but Zero flag will be reset. This matches the standard definition or established fact for the concept asked.
MES Jr. Grade • Paper-III
Out of the following diodes, the noisiest one is
A)
TRAPATT
B)
IMPATT
C)
GUNN
D)
Tunnel
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'TRAPATT' (Option A).
MES Jr. Grade • Paper-III
In a radio receiver AGC is used
A)
To improve the noise figure of the receiver
B)
To maintain the carrier level at the second detector input constant
C)
To improve selectivity of the receiver
D)
None of the above
Option B: To maintain the carrier level at the second detector input constant. This matches the standard definition or established fact for the concept asked.
