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Assertion (A): An artificial transmission line can be used as a pulse generator. Reason (R): A pulse function is used very frequently in network analysis. | |
A. | Both A and R are correct and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are correct but R is not correct explanation of A [Correct Answer] |
C. | A is correct but R is wrong [Wrong Answer] |
D. | A is wrong but R is correct [Wrong Answer] |
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Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Decimal 8 in excess-3 code =
1000
1001
1011
1111
⇒
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
⇒ In 8085
all operations are on 8 bit data
majority of operations are on 8 bit data
all operations are on 8 bit or 4 bit data
either (a) or (c)
⇒ In the stabilized reactance modulator AFC system
phase modulation is converted into amplitude modulation by the equalizer circuit
the discriminator frequency must not be too low or the system will fail
the discriminator must have a fast time constant to prevent demodulation
the higher discriminator frequency, better the oscillator frequency stability
⇒ The waveform shown in the given Figure can be written
v(t) = u(t - 1) + u(t - 2) + u(t - 3) + u(t -4)
v(t) = u(t - 1) + u(t - 2) + u(t - 3) + u(t -4) - u(t - 5)
v(t) = u(t - 1) + u(t - 2) + u(t - 3) + u(t -4) - 4u(t - 5)
v(t) = u(t - 1) + u(t - 2) + u(t - 3) + u(t -4) + 4u(t - 5)
⇒ If transmission bandwidth is doubled in FM, SNR is
doubled
raised four times
decreased four times
halved
⇒ What is the minimum value of VSWR that may exist on a transmission line?
Less than zero
Zero
One
10
⇒ Find 'X' in the circuit be
∏(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
0
Σ(14)
1
⇒ A rectangular wave guide is designed to propagate at the dominant mode TE_{10} at a frequency of 5 GHz. The cut-off frequency is 0.8 of signal frequency. The ratio of the guide width to height is 2. The dimensions of the guide are
3.75 cm, 1.875 cm
4 cm, 2 cm
8 cm, 4 cm
2.54 cm, 1.27 cm
⇒ TV signal strength when expressed in dB m has the reference of
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5 μV/m
2 μV/m
1 μV/m
⇒ An amplitude modulated wave
0.5
0.3
0.7
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⇒ A single phase dual converter consists of
two fully controlled converters connected in parallel
two fully controlled converters connected in antiparallel
two fully controlled semiconverters connected in antiparallel
two fully controlled semiconverters connected in parallel
⇒ In figure the output v(t)
phase modulated signal
amplitude modulated signal
frequency modulated signal
none of the above
⇒ The circuit of the given figur
full adder
magnitude comparator
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⇒ The charge of an electron is
1.6 x 10^{-17} coulomb
1.6 x 10^{-19 } coulomb
1.6 x 10^{-21} coulomb
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⇒ In intrinsic semiconductors, the number of free electrons is equal to the number of mobile holes.
TRUE
FALSE
⇒ In a square law modulator, the carrier frequency should be __________ times than the highest modulating frequency.
1
2
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⇒ A dual trace CRO has
one electron gun
two electron guns
one electron gun with one two pole switch
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⇒ If a function Z(s) has a pole at infinity, then
the degrees of numerator and denominator are equal
the degree of numerator is one higher than that of denominator
the degree of denominator is one higher than that of numerator
the difference between the degrees of numerator and denominator is 0 or 1
⇒ In a parallel resonant circuit, the circuit current at resonance is maximum.
TRUE
FALSE
⇒ Ferrites have
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low eddy current loss
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⇒ The pre-emphasis in FM aids in providing extra noise immunity by
emphasizing only the higher frequency components
emphasizing the entire frequency band
emphasizing only the lower frequency band
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1
2
3
4
⇒ For type 2 system, the magnitude and phase angle of the term (jω)^{2} in the denominator, at ω = 0, are respectively
0 and - 90°
0 and + 90°
infinity and - 180°
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⇒ If a line is open circuited Z_{in} = Z_{0} tanh (gl).
TRUE
FALSE
⇒ Inverter 74 LS04 has following specifications I_{0H} max = - 0.4 mA, I_{0L max} = 8 mA, I_{IH max} = 20 μA, I_{IL max} = 0.
10
20
60
100
⇒ The most noise resistant modulation system is
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SSB suppressed carrier
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< 3.774 MHz
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⇒ The Thevenin's equivalent of network in figure(1) is a 10 V source in series with 2 Ω resistance. If a 3 Ω resistance is connected across AB as shown in figure(2) the Thevenin's equivalen
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6 V in series with 1.2 Ω resistance
10 V in series with 5 Ω resistance
6 V in series with 5 Ω resistance
⇒ Bandwidth of an antenna is related with where Q is quality factor
Q ∝ B
Q ∝ 1/B
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Q ∝ 1/B^{2}
⇒ Decimal 8 in excess-3 code =
1000
1001
1011
1111
⇒
Assertion (A): A JFET can be used as a current source.
Reason (R): In beyond pinch off region the current in JFET is nearly constant.
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
⇒ In 8085
all operations are on 8 bit data
majority of operations are on 8 bit data
all operations are on 8 bit or 4 bit data
either (a) or (c)
⇒ In the stabilized reactance modulator AFC system
phase modulation is converted into amplitude modulation by the equalizer circuit
the discriminator frequency must not be too low or the system will fail
the discriminator must have a fast time constant to prevent demodulation
the higher discriminator frequency, better the oscillator frequency stability
⇒ The waveform shown in the given Figure can be written
v(t) = u(t - 1) + u(t - 2) + u(t - 3) + u(t -4)
v(t) = u(t - 1) + u(t - 2) + u(t - 3) + u(t -4) - u(t - 5)
v(t) = u(t - 1) + u(t - 2) + u(t - 3) + u(t -4) - 4u(t - 5)
v(t) = u(t - 1) + u(t - 2) + u(t - 3) + u(t -4) + 4u(t - 5)
⇒ If transmission bandwidth is doubled in FM, SNR is
doubled
raised four times
decreased four times
halved
⇒ What is the minimum value of VSWR that may exist on a transmission line?
Less than zero
Zero
One
10
⇒ Find 'X' in the circuit be
∏(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
0
Σ(14)
1
⇒ A rectangular wave guide is designed to propagate at the dominant mode TE_{10} at a frequency of 5 GHz. The cut-off frequency is 0.8 of signal frequency. The ratio of the guide width to height is 2. The dimensions of the guide are
3.75 cm, 1.875 cm
4 cm, 2 cm
8 cm, 4 cm
2.54 cm, 1.27 cm
⇒ TV signal strength when expressed in dB m has the reference of
10 μV/m
5 μV/m
2 μV/m
1 μV/m
⇒ An amplitude modulated wave
0.5
0.3
0.7
0.4
⇒ A single phase dual converter consists of
two fully controlled converters connected in parallel
two fully controlled converters connected in antiparallel
two fully controlled semiconverters connected in antiparallel
two fully controlled semiconverters connected in parallel
⇒ In figure the output v(t)
phase modulated signal
amplitude modulated signal
frequency modulated signal
none of the above
⇒ The circuit of the given figur
full adder
magnitude comparator
parity detector
none of the above
⇒ The charge of an electron is
1.6 x 10^{-17} coulomb
1.6 x 10^{-19 } coulomb
1.6 x 10^{-21} coulomb
1.6 x 10^{-23} coulomb
⇒ In intrinsic semiconductors, the number of free electrons is equal to the number of mobile holes.
TRUE
FALSE
⇒ In a square law modulator, the carrier frequency should be __________ times than the highest modulating frequency.
1
2
4
3
⇒ A dual trace CRO has
one electron gun
two electron guns
one electron gun with one two pole switch
two electron guns with one two pole switch
⇒ If a function Z(s) has a pole at infinity, then
the degrees of numerator and denominator are equal
the degree of numerator is one higher than that of denominator
the degree of denominator is one higher than that of numerator
the difference between the degrees of numerator and denominator is 0 or 1
⇒ In a parallel resonant circuit, the circuit current at resonance is maximum.
TRUE
FALSE
⇒ Ferrites have
a low copper loss
low eddy current loss
low resistivity
higher specific gravity compared to iron
⇒ The pre-emphasis in FM aids in providing extra noise immunity by
emphasizing only the higher frequency components
emphasizing the entire frequency band
emphasizing only the lower frequency band
cutting down the low frequency noise
⇒ The numbers of accelerating anodes in a CRO is
1
2
3
4
⇒ For type 2 system, the magnitude and phase angle of the term (jω)^{2} in the denominator, at ω = 0, are respectively
0 and - 90°
0 and + 90°
infinity and - 180°
infinity and + 180°
⇒ If a line is open circuited Z_{in} = Z_{0} tanh (gl).
TRUE
FALSE
⇒ Inverter 74 LS04 has following specifications I_{0H} max = - 0.4 mA, I_{0L max} = 8 mA, I_{IH max} = 20 μA, I_{IL max} = 0.
10
20
60
100
⇒ The most noise resistant modulation system is
PCM
SSB suppressed carrier
FM
pulse position modulation
⇒ For a MOD-12 counter, the FF has a t_{pd} = 60 ns The NAND gate has a t_{pd} of 25 n sec. The clock frequency is
3.774 MHz
> 3.774 MHz
< 3.774 MHz
4.167 MHz
⇒ The Thevenin's equivalent of network in figure(1) is a 10 V source in series with 2 Ω resistance. If a 3 Ω resistance is connected across AB as shown in figure(2) the Thevenin's equivalen
10 V in series with 1.2 Ω resistance
6 V in series with 1.2 Ω resistance
10 V in series with 5 Ω resistance
6 V in series with 5 Ω resistance
⇒ Bandwidth of an antenna is related with where Q is quality factor
Q ∝ B
Q ∝ 1/B
Q ∝ B^{2}
Q ∝ 1/B^{2}