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A. | TRUE [Wrong Answer] |
B. | FALSE [Correct Answer] |
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Also Read Similar Questions Below :
⇒ If two time varying signals of equal magnitude and zero phase displacement are applied to X and Y plates respectively; of CRO, the display will be
a straight line
a circle
an ellipse
a square
⇒ Radar principle is used in
detection of aircraft
burglar alarms
garage door openers
all of the above
⇒ For a stable system having two or more gain crossover frequencies the phase margin is measured
at lowest gain crossover frequency
at highest gain crossover frequency
at the gain crossover frequencies
none of the above
⇒ The charges between a hollow and solid metal spheres reside
through out in both
on outer surface in hollow and through out in solid
on the outer surface in both
none of the above
⇒ For the differential equation (D^{3} - D^{2} + D -1) [y(t)] = 0 the root of auxiliary equation
-j, j, 1
-j, j, 2
1, 2, j
1, 2, -j
⇒ A CE amplifier has r_{e} = 6 Ω, β = 100 and a = 0.98. The input impedance is
6 Ω
100 Ω
600 Ω
98 Ω
⇒ When the mains supply is switched off the contents of primary computer memory are lost.
TRUE
FALSE
⇒ Which of the following has highest power gain?
CE
CC
CB
CB or CC
⇒ Which of the following be true for a CE transistor amplifier if the emitter resistor value is made equal to zero?
1 and 2
2 and 3
3 and 4
1 and 4
⇒ Tropospheric scatter is used with frequencies in the
HF
VHF
UHF
VLF
⇒ The feedback technique employed in the following circuit
voltage series feedback
current series feedback
voltage shunt feedback
current shunt feedback
⇒ If F_{n} represents Fourier series coefficient of f(t), then Fourier series coefficient of f(t + t) =
F_{n}e ^{-jω}_{0}^{t}
F_{n}e ^{jω}_{0}^{t}
F_{n}e ^{jnω}_{0}^{t}
F_{n}e ^{-jnω}_{0}^{t}
⇒ In 8085 the data is stored in the stack on
First in First Out basis
Last in First Out basis
First in Last Out basis
Last in Last Out basis
⇒ Which is known as flash converter?
Weighted resistor D/A converter
Parallel A/D converter
Stair step A/D converter
Up-down counter type A/D converter
⇒ A UJT exhibits negative resistance characteristics when
Current is less than valley current
Current is less than peak current
Current is more than peak current but less than valley current
None of the above
⇒ In forward active region, the operation of a BJT
both junctions are forward biased
both junctions are reverse biased
emitter base junction is forward biased and base collector junction is reverse biased
emitter base junction is reverse biased and base collector junction is reverse biased
⇒ Which of the following photodetector does not provide gain?
Phototransistor
Photoconductor
Avalanche photodiode
p-i-n photodiode
⇒ Under identical conditions, for a single modulating frequency, FM and PM are indistinguishable. Now if the modulating frequency is reduced, then
phase modulation index as well as frequency modulation index decrease
phase modulation index as well as frequency modulation index increase
phase modulation index will remain constant whereas frequency modulation index will increase
phase modulation index will decrease whereas frequency modulation index will remain constant
⇒ A function of one of more variables which conveys information on the nature of physical phenomenon is called
Noise
Interference
System
Signal
⇒ A rectangular pulse train s(t) is shown in figure is convolved with the signal cos^{2}(4p x 10^{3}t). The convolved signal will
DC
12 kHZ sinusoidal
8 kHZ sinusoidal
14 kHZ sinusoidal
⇒ If p is the probability of success and q is the probability of failure, then the probability that there are r successes in n trails is
^{n}c_{r} p^{r} q^{n} ^{-} ^{r}
^{n}c_{r} p^{n -} ^{r} q^{r}
^{n}c_{r} p^{r} q^{n} ^{+} ^{r}
^{n}c_{r} p^{n} q^{n} ^{- r}
⇒ If X(z) = (1 - az^{-1}), and |a| < |z|, the initial value x_{0} is
1
0
2
∞
⇒ The wave applied to X plates, for ohtaining trace of voltage wave, is
sawtooth wave
sinusoidal wave
rectangular wave
either (a) or (c)
⇒ SSB stands for
Single Side Band
Suppressed Side Band
Single Sound Band
Single Sky Band
⇒ For a quadratic factor in transfer function the phase angle is not a function of damping factor.
TRUE
FALSE
⇒ A T network is inserted between source and R as shown in figure. The resistance seen by the source remains the same with or without T network when
5 Ω
10 Ω
15 Ω
20 Ω
⇒ The total field produced by an antenna array system at a distance from it is
sum of the field produced by the individual antennas of the array system
directional gain of antenna
linear antenna gain
vector sum of the field produced by the individual antennas of the array system
⇒ Which one of the following is not a characteristic of a ferroelectric material?
High dielectric constant
No hysteresis
Ferroelectric characteristic only above the curie point
Electric dipole moment
⇒ Audio tapes have two tracks each 2.5 mm wide.
TRUE
FALSE
⇒ A signal with ± 10 V ranged and 1 KHz band width is being digitized using a sample and hold circuit and a 10 bit quantizer. The minimum sampling rate is :
62831.9 V/sec
125663.8 V/sec
31415.95 V/sec
None
⇒ If two time varying signals of equal magnitude and zero phase displacement are applied to X and Y plates respectively; of CRO, the display will be
a straight line
a circle
an ellipse
a square
⇒ Radar principle is used in
detection of aircraft
burglar alarms
garage door openers
all of the above
⇒ For a stable system having two or more gain crossover frequencies the phase margin is measured
at lowest gain crossover frequency
at highest gain crossover frequency
at the gain crossover frequencies
none of the above
⇒ The charges between a hollow and solid metal spheres reside
through out in both
on outer surface in hollow and through out in solid
on the outer surface in both
none of the above
⇒ For the differential equation (D^{3} - D^{2} + D -1) [y(t)] = 0 the root of auxiliary equation
-j, j, 1
-j, j, 2
1, 2, j
1, 2, -j
⇒ A CE amplifier has r_{e} = 6 Ω, β = 100 and a = 0.98. The input impedance is
6 Ω
100 Ω
600 Ω
98 Ω
⇒ When the mains supply is switched off the contents of primary computer memory are lost.
TRUE
FALSE
⇒ Which of the following has highest power gain?
CE
CC
CB
CB or CC
⇒ Which of the following be true for a CE transistor amplifier if the emitter resistor value is made equal to zero?
- Its gain will increase
- Its stability will increase
- Its gain will decrease
- Its stability will decrease
1 and 2
2 and 3
3 and 4
1 and 4
⇒ Tropospheric scatter is used with frequencies in the
HF
VHF
UHF
VLF
⇒ The feedback technique employed in the following circuit
voltage series feedback
current series feedback
voltage shunt feedback
current shunt feedback
⇒ If F_{n} represents Fourier series coefficient of f(t), then Fourier series coefficient of f(t + t) =
F_{n}e ^{-jω}_{0}^{t}
F_{n}e ^{jω}_{0}^{t}
F_{n}e ^{jnω}_{0}^{t}
F_{n}e ^{-jnω}_{0}^{t}
⇒ In 8085 the data is stored in the stack on
First in First Out basis
Last in First Out basis
First in Last Out basis
Last in Last Out basis
⇒ Which is known as flash converter?
Weighted resistor D/A converter
Parallel A/D converter
Stair step A/D converter
Up-down counter type A/D converter
⇒ A UJT exhibits negative resistance characteristics when
Current is less than valley current
Current is less than peak current
Current is more than peak current but less than valley current
None of the above
⇒ In forward active region, the operation of a BJT
both junctions are forward biased
both junctions are reverse biased
emitter base junction is forward biased and base collector junction is reverse biased
emitter base junction is reverse biased and base collector junction is reverse biased
⇒ Which of the following photodetector does not provide gain?
Phototransistor
Photoconductor
Avalanche photodiode
p-i-n photodiode
⇒ Under identical conditions, for a single modulating frequency, FM and PM are indistinguishable. Now if the modulating frequency is reduced, then
phase modulation index as well as frequency modulation index decrease
phase modulation index as well as frequency modulation index increase
phase modulation index will remain constant whereas frequency modulation index will increase
phase modulation index will decrease whereas frequency modulation index will remain constant
⇒ A function of one of more variables which conveys information on the nature of physical phenomenon is called
Noise
Interference
System
Signal
⇒ A rectangular pulse train s(t) is shown in figure is convolved with the signal cos^{2}(4p x 10^{3}t). The convolved signal will
DC
12 kHZ sinusoidal
8 kHZ sinusoidal
14 kHZ sinusoidal
⇒ If p is the probability of success and q is the probability of failure, then the probability that there are r successes in n trails is
^{n}c_{r} p^{r} q^{n} ^{-} ^{r}
^{n}c_{r} p^{n -} ^{r} q^{r}
^{n}c_{r} p^{r} q^{n} ^{+} ^{r}
^{n}c_{r} p^{n} q^{n} ^{- r}
⇒ If X(z) = (1 - az^{-1}), and |a| < |z|, the initial value x_{0} is
1
0
2
∞
⇒ The wave applied to X plates, for ohtaining trace of voltage wave, is
sawtooth wave
sinusoidal wave
rectangular wave
either (a) or (c)
⇒ SSB stands for
Single Side Band
Suppressed Side Band
Single Sound Band
Single Sky Band
⇒ For a quadratic factor in transfer function the phase angle is not a function of damping factor.
TRUE
FALSE
⇒ A T network is inserted between source and R as shown in figure. The resistance seen by the source remains the same with or without T network when
5 Ω
10 Ω
15 Ω
20 Ω
⇒ The total field produced by an antenna array system at a distance from it is
sum of the field produced by the individual antennas of the array system
directional gain of antenna
linear antenna gain
vector sum of the field produced by the individual antennas of the array system
⇒ Which one of the following is not a characteristic of a ferroelectric material?
High dielectric constant
No hysteresis
Ferroelectric characteristic only above the curie point
Electric dipole moment
⇒ Audio tapes have two tracks each 2.5 mm wide.
TRUE
FALSE
⇒ A signal with ± 10 V ranged and 1 KHz band width is being digitized using a sample and hold circuit and a 10 bit quantizer. The minimum sampling rate is :
62831.9 V/sec
125663.8 V/sec
31415.95 V/sec
None