Users Also Read
MCQ's Search Engine
Electrical Engineering
Mechanical Engineering
Civil Engineering
Automobile Engineering
Chemical Engineering
Computer Engineering
Electronics Engineering
Medical Science Engg
If D is diameter of circular waveguide the cutoff wave-length for TE_{11} mode is equal to | |
A. | 1.706 D [Correct Answer] |
B. | 2.11 D [Wrong Answer] |
C. | 0.82 D [Wrong Answer] |
D. | 0.41 D [Wrong Answer] |
View Answer
Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ The first contribution to logic was made by
George Boole
Copernicus
Aristotle
Shannon
⇒ The noise generated by a resistor depends upon
its resistance value
its operating temperature
both its resistance value and operating temperature
none of the above
⇒ The accuracy of measurement using CRO is about
± 0.5%
± 0.05 %
± 1%
± 3%
⇒ Effect of loading of line is
increase in Z_{0}, a and β
increase in Z_{0} and β but decrease in a
decrease in Z_{0}, a and β
decrease in Z_{0} and β but increase in a
⇒ The signal defined by the equations f(t) = 0 for t < 0, f(t) = E for 0 ≤ t ≤ a and f(t) = 0 for t > a is
a step function
a pulse function
a shifted step function originating at t = a
none of the above
⇒ In an R-C circuit, the impedance is 40 Ω at a frequency of 100 Hz. At 200 Hz the impedance should be
40 Ω
80 Ω
20 Ω
more than 20 Ω but less than 40 Ω
⇒ An instruction used to set the carry flag in a computer can be classified as
data transfer
arithmetic
Logical
program control
⇒ If the conductivity of pure germanium is 1.54 siemens/metre, its resistivity in ohm-metre will be nearly
65
6.5
0.65
0.065
⇒ The address to which a software or hardware restart branches is known as
Vector location
SID
SOD
TRAP
⇒ Which of the following is Doppler effect not used?
CW radar
FM radar
MTI system
Moving target plotting on PPI
⇒ The ROC of sequence in the Z.T. of sequence x[n] = a^{n} ∪ [n] is
z > a
z < a
|z| > a
|z| < a
⇒ The number of gates in an SCR is
1
3
4
6
⇒ In a CMOS CS amplifier, the active load is obtained by connecting a
p channel current mirror circuit
n channel transistor
p channel transistor
BJT current mirror
⇒ Which one of the following is not necessarily an advantage of the phase cancellation method of obtaining SSB over the filter method?
It is possible to generate SSB at any frequency
SSB with lower audio frequencies present can be generated
Switching from one sideband to other is simpler
There are more balanced modulators; therefore the carrier is suppressed better
⇒ The coefficients F_{n} in the exponential form of Fourier series are
independent of frequency
functions of frequency
even function of frequency
odd functions of frequency
⇒ A Marconi antenna
is a grounded antenna with a length equal to λ/4
is an ungrounded antenna with a length equal to λ/4
has a length equal to 1
has a length equal to λ/2
⇒ Choose correct option for a stable system :
I is true, II is true
I is true, II is false
I is false, II is true
I is false, II is false
⇒ Consider the following, logic diagr
0000 to 1111
0000 to 1001
0000 to 1010
1001 to 0000
⇒ The ROC of sequence x[n] = (0.8)^{n} ∪[n] + (0.4)^{n} ∪[n]
|z| > 0.8
|z| > 0.4
0.4 < |z| < 0.8
|z| < 0.8
⇒
A-5, B-3, C-2, D-1
A-1, B-2, C-3, D-5
A-3, B-5, C-1, D-2
A-3, B-5, C-2, D-1
⇒ Which of the following are voltage controlled devices?
Vacum triode
FET
SCR
Both (a) and (b)
⇒ For the two ports in figure, y_{11} = 8 mho, y_{12} = y_{21} = -6 mho and y_{22} = 6 mho. The values of Y_{A}, Y_{B}, Y_{C} respectively
2, 6, 6 mho
2, 6, 0 mho
2, 0, 6 mho
2, 6, 8 mho
⇒ If a shunt of 200 Ω resistance is used with a galvanometer of 1000 Ω resistance, the multiplying power is
6
5
42740
42741
⇒ In PAL system
phase of U signal is reversed on alternating lines
phase of V signal is reversed on alternating lines
phases of both U and V signals are reversed on alternating lines
none of the above
⇒ Which has the lowest propagation delay time?
ECL
TTL
CMOS
PMOS
⇒ If f(- t) = f(t), the function f(t) has only cosine terms.
TRUE
FALSE
⇒ Read the following statements about Java
All
1, 2 and 3 only
1, 2 and 4 only
2, 3, 4 only
⇒ An 8 bit wide 4 word sequential memory has
Eight 4 bit shift registers
Eight 8 bit shift registers
Four 8 bit shift registers
Foui 4 bit shift registers
⇒
A-1, B-4, C-3, D-2
A-3, B-2, C-1, D-4
A-1, B-2, C-3, D-4
A-3, B-4, C-1, D-2
⇒ A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the cut off frequency for dominant mode.
4 GHz
7.5 GHz
5 GHz
10 GHz
⇒ The first contribution to logic was made by
George Boole
Copernicus
Aristotle
Shannon
⇒ The noise generated by a resistor depends upon
its resistance value
its operating temperature
both its resistance value and operating temperature
none of the above
⇒ The accuracy of measurement using CRO is about
± 0.5%
± 0.05 %
± 1%
± 3%
⇒ Effect of loading of line is
increase in Z_{0}, a and β
increase in Z_{0} and β but decrease in a
decrease in Z_{0}, a and β
decrease in Z_{0} and β but increase in a
⇒ The signal defined by the equations f(t) = 0 for t < 0, f(t) = E for 0 ≤ t ≤ a and f(t) = 0 for t > a is
a step function
a pulse function
a shifted step function originating at t = a
none of the above
⇒ In an R-C circuit, the impedance is 40 Ω at a frequency of 100 Hz. At 200 Hz the impedance should be
40 Ω
80 Ω
20 Ω
more than 20 Ω but less than 40 Ω
⇒ An instruction used to set the carry flag in a computer can be classified as
data transfer
arithmetic
Logical
program control
⇒ If the conductivity of pure germanium is 1.54 siemens/metre, its resistivity in ohm-metre will be nearly
65
6.5
0.65
0.065
⇒ The address to which a software or hardware restart branches is known as
Vector location
SID
SOD
TRAP
⇒ Which of the following is Doppler effect not used?
CW radar
FM radar
MTI system
Moving target plotting on PPI
⇒ The ROC of sequence in the Z.T. of sequence x[n] = a^{n} ∪ [n] is
z > a
z < a
|z| > a
|z| < a
⇒ The number of gates in an SCR is
1
3
4
6
⇒ In a CMOS CS amplifier, the active load is obtained by connecting a
p channel current mirror circuit
n channel transistor
p channel transistor
BJT current mirror
⇒ Which one of the following is not necessarily an advantage of the phase cancellation method of obtaining SSB over the filter method?
It is possible to generate SSB at any frequency
SSB with lower audio frequencies present can be generated
Switching from one sideband to other is simpler
There are more balanced modulators; therefore the carrier is suppressed better
⇒ The coefficients F_{n} in the exponential form of Fourier series are
independent of frequency
functions of frequency
even function of frequency
odd functions of frequency
⇒ A Marconi antenna
is a grounded antenna with a length equal to λ/4
is an ungrounded antenna with a length equal to λ/4
has a length equal to 1
has a length equal to λ/2
⇒ Choose correct option for a stable system :
- Roots of the characteristic equation of the system are real and negative
- Area within the impulse response is finite
I is true, II is true
I is true, II is false
I is false, II is true
I is false, II is false
⇒ Consider the following, logic diagr
0000 to 1111
0000 to 1001
0000 to 1010
1001 to 0000
⇒ The ROC of sequence x[n] = (0.8)^{n} ∪[n] + (0.4)^{n} ∪[n]
|z| > 0.8
|z| > 0.4
0.4 < |z| < 0.8
|z| < 0.8
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | Resistance | 1. | Current noise |
B. | Diode | 2. | Partition noise |
C. | Triode | 3. | Shot noise |
D. | p-n junction | 4. | Atmospheric noise |
5. | Johnson noise |
A-5, B-3, C-2, D-1
A-1, B-2, C-3, D-5
A-3, B-5, C-1, D-2
A-3, B-5, C-2, D-1
⇒ Which of the following are voltage controlled devices?
Vacum triode
FET
SCR
Both (a) and (b)
⇒ For the two ports in figure, y_{11} = 8 mho, y_{12} = y_{21} = -6 mho and y_{22} = 6 mho. The values of Y_{A}, Y_{B}, Y_{C} respectively
2, 6, 6 mho
2, 6, 0 mho
2, 0, 6 mho
2, 6, 8 mho
⇒ If a shunt of 200 Ω resistance is used with a galvanometer of 1000 Ω resistance, the multiplying power is
6
5
42740
42741
⇒ In PAL system
phase of U signal is reversed on alternating lines
phase of V signal is reversed on alternating lines
phases of both U and V signals are reversed on alternating lines
none of the above
⇒ Which has the lowest propagation delay time?
ECL
TTL
CMOS
PMOS
⇒ If f(- t) = f(t), the function f(t) has only cosine terms.
TRUE
FALSE
⇒ Read the following statements about Java
- It is well suited to design software which works in conjunction with internet.
- It is cross platform language.
- Java is close to programming language C, C ++ etc.
- It is an object oriented.
All
1, 2 and 3 only
1, 2 and 4 only
2, 3, 4 only
⇒ An 8 bit wide 4 word sequential memory has
Eight 4 bit shift registers
Eight 8 bit shift registers
Four 8 bit shift registers
Foui 4 bit shift registers
⇒
Match the following:
List I (I/P - O/P relation) | List II (Property of the system) | ||
---|---|---|---|
A. | y(n) = x(n) | 1. | Nonlinear, non-causal |
B. | y(n) = x(n^{2}) | 2. | Linear, non casual |
C. | y(n) = x^{2}(-n) | 3. | Linear causal |
D. | y(n) = x^{2}(n) | 4. | Nonlinear causal |
A-1, B-4, C-3, D-2
A-3, B-2, C-1, D-4
A-1, B-2, C-3, D-4
A-3, B-4, C-1, D-2
⇒ A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the cut off frequency for dominant mode.
4 GHz
7.5 GHz
5 GHz
10 GHz