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Consider the following applications
| |
A. | 1 2 and 3 [Correct Answer] |
B. | l and 2 only [Wrong Answer] |
C. | 1 and 3 only [Wrong Answer] |
D. | 2 and 3 only [Wrong Answer] |
View Answer
Explanation:-
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Also Read Similar Questions Below :
⇒ An SR flip flop can be built using NOR gates or NAND gates.
TRUE
FALSE
⇒ A hollow rectangular waveguide has dimensions a = 2b. Calculate the amount of attenuation, if the frequency is 3 GHz, and b = 1 cm.
49
47.33
50.33
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⇒
A-4, B-1, C-3, D-2
A-3, B-1, C-4, D-2
A-2, B-3, C-1, D-4
A-1, B-2, C-3, D-4
⇒ The logic performed by the high-noise immunity logic circuit shown belo
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⇒ The binary sum of 111010_{2} and 11011_{2} is
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1011001_{2}
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⇒ The L/C has the dimension of
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⇒ Transfer functions of even complicated components can be found by frequency response tests.
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⇒ Henry is equivalent to
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⇒ The pole-zero plot given below corresponds
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⇒ Two port Z parameter not exist for the circuit if
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⇒ Which of the following statements is incorrect?
The line integral of B around the circuit is called magnetomotive force
Normal components of B are continuous but the normal components of H are not continuous
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⇒ In an ideal diode there is no breakdown, no __________ current, and no forward __________ drop.
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⇒ The F.T. of a conjugate symmetric function is always
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⇒ A step down cycloconverter has an input frequency f. If it uses natural commutation, the output frequency
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⇒ The following components are used to measure power output of a 2 kW TWT amplifier:
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⇒ To ensure that only dominant mode TE_{10} is allowed to propagate in an air filled rectangular waveguide, the lower frequency limit and upper frequency limit are
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about 50% above f_{c} for TE_{10} and 25% below f_{c} for TE_{20} mode respectively
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⇒ For the NMOS gate in the given figure,
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⇒ An amplifier has open loop gain of 100, input impedance 1 kΩ and output impedance 100 Ω. If negative feedback with β = 0.99 is used, the new input and output impedances are
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⇒ Consider the following statements: In a differential amplifier using JFET, the differential output offset is due to
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⇒ An SR flip flop can be built using NOR gates or NAND gates.
TRUE
FALSE
⇒ A hollow rectangular waveguide has dimensions a = 2b. Calculate the amount of attenuation, if the frequency is 3 GHz, and b = 1 cm.
49
47.33
50.33
50
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | IF amplifier | 1. | Amplifier frequencies in the range of 100 kHz to 5 MHz. |
B. | RF amplifier | 2. | Current in the output flows only during a portion of the positive half of the input cycle |
C. | AF amplifier | 3. | Amplifier frequencies in the range of 0 Hz to 5 MHz |
D. | Class operation | 4. | Amplifier frequencies in the frequency range of 40 Hz to 15 kHz. |
A-4, B-1, C-3, D-2
A-3, B-1, C-4, D-2
A-2, B-3, C-1, D-4
A-1, B-2, C-3, D-4
⇒ The logic performed by the high-noise immunity logic circuit shown belo
OR
AND
NOR
NAND
⇒ The binary sum of 111010_{2} and 11011_{2} is
1010101_{2}
1011001_{2}
1011101_{2}
1111111_{2}
⇒ The L/C has the dimension of
time
capacitance
velocity
resistance
⇒ Transfer functions of even complicated components can be found by frequency response tests.
TRUE
FALSE
⇒ Henry is equivalent to
Volts/Ampere
Weber/Volt
Weber/Ampere
Weber/Ampere^{2}
⇒ The pole-zero plot given below corresponds
low pass filter
high pass filter
band pass filter
notch filter
⇒ The phenomenon of overlap in converter operation due to
source resistance
source inductance
both source resistance and source inductance
high value of firing angle
⇒ Two port Z parameter not exist for the circuit if
Δz = 0
Δz
Δz = 1
always exist
⇒ Which of the following statements is incorrect?
The line integral of B around the circuit is called magnetomotive force
Normal components of B are continuous but the normal components of H are not continuous
Magnetic flux lines are bent away from the normal in the medium with the highest value of permeability
The unit of permeability is henry/metre
⇒ In an ideal diode there is no breakdown, no __________ current, and no forward __________ drop.
reverse, voltage
forward, current
forward, voltage
reverse, current
⇒ The F.T. of a conjugate symmetric function is always
imaginary
real
conjugate Unsymmetric
conjugate symmetric
⇒ Barkhausen criterion of oscillation is
Aβ > 1
Aβ = 1
Aβ = < 1
Aβ ≤ 1
⇒ Intrinsic or characteristic impedance of free space has a value of
120 ohm
73 ohm
73 ε ohm
120 ε ohm
⇒ A transistor amplifier has pole
s_{1}
s_{1} + s_{2} + s_{3} + s_{4}
s_{1} + s_{4}
s_{4}
⇒ A step down cycloconverter has an input frequency f. If it uses natural commutation, the output frequency
must be a sub-multiple of input frequency
can be any frequency
must be an even sub-multiple of input frequency
must be an odd sub-multiple of input frequency
⇒ The following components are used to measure power output of a 2 kW TWT amplifier:
- TWTA
- Low pass/high pass filter
- 20 dB attenuator
- 40 dB directional complex with matched load
- Power load
2 - 4 - 1 - 3 - 5
1 - 3 - 4 - 2 - 5
1 - 2 - 4 - 3 - 5
2 - 4 - 1 - 5 - 3
⇒ To ensure that only dominant mode TE_{10} is allowed to propagate in an air filled rectangular waveguide, the lower frequency limit and upper frequency limit are
about 25% above f_{c} for TE_{10} and 5% below f_{c} for TE_{20} mode respectively
about 50% above f_{c} for TE_{10} and 25% below f_{c} for TE_{20} mode respectively
about 25% above f_{c} for TE_{10} and 25% below f_{c} for TE_{20} mode respectively
none of the above
⇒ For the NMOS gate in the given figure,
ABCDE
(AB + C) (D + E)
A(B + C) + DE
A + B C + DE
⇒ An instrument of accuracy class 1 can have an error equal to
+ 1% of reading
± 1% of reading
± 1% of full scale deflection
+ 1% of full scale deflection
⇒ The effective modulation index is:
0.91287
0.8306
1
none of these
⇒ Four voltmeters have following specifications. If accuracy is main consideration which is the best?
100 V, 2 mA
100 V, 100 mA
100 V, 1 mA
100 V, 0.1 mA
⇒ A standard cell of 1.0185 V is used with a slide wire potentiometer. The balance was obtained at 60 cm. When an unknown emf was connected, the balance was obtained at 82 cm. The magnitude of unknown emf is
1.39 V
0.75 V
13.9 V
7.45 V
⇒ Which of the following statement number is not valid in Basic
12
521
662512
99999
⇒ An amplifier has open loop gain of 100, input impedance 1 kΩ and output impedance 100 Ω. If negative feedback with β = 0.99 is used, the new input and output impedances are
10 Ω and 1 Ω
10 Ω and 10 kΩ
100 kΩ and 1 Ω
100 kΩ and 10 Ω
⇒ For satellite communication, standard Earth stations have antenna diameters in the range of __________ metre.
27.5 to 30
10 to 15
30 to 50
5 to 10
⇒ A + (B . C) =
A . B + C
A . B + A . C
A
(A + B) . (A + C)
⇒ Consider the following statements: In a differential amplifier using JFET, the differential output offset is due to
- mismatch between FET parameters
- difference in values of resistances used in circuit
- variation in supply voltage.
1 and 2
1, 2, 3
2, 3
1, 3