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Assertion (A): Impedance measurement at microwave frequencies is done by finding SWR. Reason (R): SWR and reflection coefficient depend on the characteristic impedance and load impedance. | |
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] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ The inductance of a single layer solenoid of 10 turns is 5 μH. Which one of the following is the correct value of inductance when the number of turns is 20 and the length is doubled.
10 μH
20 μH
40 μH
5 μH
⇒ If X = 2.5 and Y = 2.5, which of the following expressions would give the result as 5/7?
X + 2.5 / Y + 3.0
(X + 2.5) / Y + 4.5
(X + 2.5) / (Y + 4.5)
(X + 2.5) / Y + 3.5
⇒ In figure, the time constant for the capacitor chargin
6 μs
10 μs
15 μs
25 μs
⇒ The ripple factor of power supply is a measure of
its filter efficiency
diode rating
its voltage regulation
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⇒ Thin gate oxide in a CMOS process in preferably grown using
wet oxidation
dry oxidation
epitaxial deposition
ion implantation
⇒ An atom of a rare gas is placed is an electric field E. Then
the nucleus will be shifted in the direction of E by an amount which is proportional to E.
the nucleus will not be shifted.
the nucleus will be shifted in the direction of E by an amount which is independent of E.
the nucleus will be shifted in a direction opposite to that of E.
⇒ In a 7 segment display the segments a, c, d, f, g are lit. The decimal number displayed will be
9
5
4
2
⇒ If the secondary winding of CT is opened when primary coil is carrying current
transformer will burn immediately
there will be weak flux density in core
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there will be high current in secondary
⇒ Which of the following has a major role in implementation of functions calls in C?
Processor's registers
Data segment
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⇒ The logic circuit given below converts a binary code y_{1} y_{2}, y_{3}
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⇒ A magnetron has a cylindrical cathode surrounded by an anode structure having cavities opening into interaction space by means of slots
TRUE
FALSE
⇒ A retriggerable one shot is one which
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can not be retriggered till the complete pulse appears at output
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⇒ In drawing phasor diagram
rms values are used
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either rms or peak values are used
either rms or peak or averages values are used
⇒ ABCD + AB C D =
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ABCD
A B D
ABCD
⇒ A discrete LTI system is non-casual if its impulse response is
a^{n} ∪(n - 2)
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⇒ The impulse response h(t) of a linear invariant continuous time system is given by h(t) = exp (- 2t) u(t), where u(t) denotes the unit step function. The output of this system to the sinusoidal input x(t) = 2cos(2t) for all time t, is
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⇒ Two thyristors of the same rating and specifications
will have equal on state voltage drops
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will have different on state voltage drops
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⇒ The circuit of the given figure
full adder
full subtractor
shift register
decade counter
⇒
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
⇒ Which of the following are included in the architecture of computer?
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⇒ The direction of vectors gives the direction of propagation of electromagnetic waves
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⇒ The main advantage of a crystal oscillator
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⇒ A permeable substance is one
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which is a weak magnet
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⇒ For a high pass filter attenuation = 0 at f = 0.
TRUE
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⇒ The following circuit diagram resembl
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logic 1
f(A, B, C) = Σm(0, 1, 4, 6, 7)
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⇒ The process of extension of a single-crystal surface by growing a film in such a way that the added atoms form a continuation of the single-crystal structure is called
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⇒ The colour coding of a resistors shows 100 K, ± 10%. When the resistance was measured with an ohmmeter, it read
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120 K
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⇒ The coils of Drysdale polar potentiometer are wound non-inductively.
TRUE
FALSE
⇒ The average load current supplied by a thyristor depends on
firing angle
firing frequency
magnitude of gate current
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⇒ In the given figure
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A + B + C
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⇒ The inductance of a single layer solenoid of 10 turns is 5 μH. Which one of the following is the correct value of inductance when the number of turns is 20 and the length is doubled.
10 μH
20 μH
40 μH
5 μH
⇒ If X = 2.5 and Y = 2.5, which of the following expressions would give the result as 5/7?
X + 2.5 / Y + 3.0
(X + 2.5) / Y + 4.5
(X + 2.5) / (Y + 4.5)
(X + 2.5) / Y + 3.5
⇒ In figure, the time constant for the capacitor chargin
6 μs
10 μs
15 μs
25 μs
⇒ The ripple factor of power supply is a measure of
its filter efficiency
diode rating
its voltage regulation
purity of power output
⇒ Thin gate oxide in a CMOS process in preferably grown using
wet oxidation
dry oxidation
epitaxial deposition
ion implantation
⇒ An atom of a rare gas is placed is an electric field E. Then
the nucleus will be shifted in the direction of E by an amount which is proportional to E.
the nucleus will not be shifted.
the nucleus will be shifted in the direction of E by an amount which is independent of E.
the nucleus will be shifted in a direction opposite to that of E.
⇒ In a 7 segment display the segments a, c, d, f, g are lit. The decimal number displayed will be
9
5
4
2
⇒ If the secondary winding of CT is opened when primary coil is carrying current
transformer will burn immediately
there will be weak flux density in core
there will be very high induced voltage in secondary
there will be high current in secondary
⇒ Which of the following has a major role in implementation of functions calls in C?
Processor's registers
Data segment
The heap
System stack
⇒ The logic circuit given below converts a binary code y_{1} y_{2}, y_{3}
Excess - 3 code
Gray code
BCD code
Hamming
⇒ A magnetron has a cylindrical cathode surrounded by an anode structure having cavities opening into interaction space by means of slots
TRUE
FALSE
⇒ A retriggerable one shot is one which
can be triggered only once
has two quasi stable states
can not be retriggered till the complete pulse appears at output
can be retriggered while the output is being generated
⇒ In drawing phasor diagram
rms values are used
peak values are used
either rms or peak values are used
either rms or peak or averages values are used
⇒ ABCD + AB C D =
ABC
ABCD
A B D
ABCD
⇒ A discrete LTI system is non-casual if its impulse response is
a^{n} ∪(n - 2)
a^{n-2} ∪(n)
a^{n+2} ∪(n)
a^{n} ∪(n + 2)
⇒ The impulse response h(t) of a linear invariant continuous time system is given by h(t) = exp (- 2t) u(t), where u(t) denotes the unit step function. The output of this system to the sinusoidal input x(t) = 2cos(2t) for all time t, is
0
2^{-0.25} cos (2t - 0.125p)
2^{-0.5} cos (2t - 0.125p)
2^{-0.5} cos (2t - 0.25p)
⇒ Two thyristors of the same rating and specifications
will have equal on state voltage drops
will have equal forward blocking voltage for the same current
will have different on state voltage drops
may have equal or different on state voltage drops and equal or different forward blocking voltage's for the same current
⇒ The circuit of the given figure
full adder
full subtractor
shift register
decade counter
⇒
Assertion (A): Magnetron is generally used in n mode.
Reason (R): Frequency for p mode can be easily separated from adjacent modes.
Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
⇒ Which of the following are included in the architecture of computer?
- Addressing mode, design of CPU
- Instruction set, data format
- Secondary memory, operating system
1 and 2
2 and 3
1 and 3
1, 2 and 3
⇒ The direction of vectors gives the direction of propagation of electromagnetic waves
Vector (E x H)
Vector (F x H)
Vector E
Vector H
⇒ The main advantage of a crystal oscillator
can oscillate any frequency
gives a high output voltage
frequency of oscillation is almost constant
can operates at a low dc voltage
⇒ A permeable substance is one
which is strong magnet
which is a weak magnet
which is a good conductor
through which magnetic lines of force can pass easily
⇒ For a high pass filter attenuation = 0 at f = 0.
TRUE
FALSE
⇒ The following circuit diagram resembl
logic 0
logic 1
f(A, B, C) = Σm(0, 1, 4, 6, 7)
none
⇒ The process of extension of a single-crystal surface by growing a film in such a way that the added atoms form a continuation of the single-crystal structure is called
Ion implantation
Chemical vapour deposition
Electroplating
Epitaxy
⇒ The colour coding of a resistors shows 100 K, ± 10%. When the resistance was measured with an ohmmeter, it read
95 K
80 K
120 K
85 K
⇒ The coils of Drysdale polar potentiometer are wound non-inductively.
TRUE
FALSE
⇒ The average load current supplied by a thyristor depends on
firing angle
firing frequency
magnitude of gate current
all of the above
⇒ In the given figure
A
B
A + B + C
ABC