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A class B amplifier
| |
A. | 2 and 3 are correct [Wrong Answer] |
B. | 1 alone is correct [Wrong Answer] |
C. | 1 and 2 are correct [Wrong Answer] |
D. | 2 alone is correct [Correct Answer] |
View Answer
Explanation:-
Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒
A-3, B-4, C-2, D-1
A-1, B-2, C-4, D-3
A-3, B-2, C-4, D-1
A-1, B-4, C-2, D-3
⇒ In a directional coupler
isolation (dB) equals coupling plus directivity
coupling (dB) equals isolation plus directivity
directivity (dB) equals isolation plus coupling
isolation (dB) equals (coupling) (directivity)
⇒ A meter having 0-1000 μA range and 1000 Ω resistance is required to be changed to 0-100 mA meter. The value of shunt resistance is about
1 Ω
10 Ω
99 Ω
100 Ω
⇒ In the graph of figure, the total number of tree
4
5
6
8
⇒ In a network with twelve circuit elements and five nodes, what is the minimum number of mesh equations?
24
12
10
8
⇒ The dual of a loop is
twig
node pan
mesh
tree
⇒ A ship-to-ship communication system is plagued by fading. The best solution seems to be the use of
space diversity
frequency diversity
a broad band antenna
a more directional antenna
⇒ Which of the following bridges is also used in an oscillator?
Maxwell
Schering
Hay
Wien
⇒ Breakdown in dielectric may be
electrical breakdown
thermal breakdown
electrochemical breakdown
any of the above
⇒ In SSB generation, the most commonly used filter is
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RC
LC
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⇒ A network has two sources of different frequencies. The only method of analysis which can be used to find current and voltages of different branches is the use of
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Superposition theorem
Thevenin's theorem
Tellegen's theorem
⇒ A geostationary satellite is one which
hangs motionless in space about 36000 km about Earth
travels around the Earth in 24 hours
remains stationary above the Earth
appears stationary to everybody on Earth
⇒ IC 74181 has two select lines.
TRUE
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⇒ A microprocessor can understand instruction written in
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⇒ The most commonly used moving iron instruments are
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⇒ In a magnetron the magnetic flux density is of the order of
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10^{12} m/s
⇒ An air-filled rectangular waveguide has dimensions 8cm x 10cm . The wavelength of waveguide at frequency 3 GHz
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⇒ The maximum temperature limit of class B insulation is
90°C
105°C
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⇒
A-2, B-1, C-4, D-3
A-3, B-1, C-4, D-2
A-2, B-4, C-1, D-3
A-3, B-4, C-1, D-2
⇒ 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
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12 kHZ sinusoidal
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⇒ A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is
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24.4 mV
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⇒ A polyphase wattmeter basically consists of two wattmeters. The moving system of two wattmeters
are common
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are generally separate
⇒ Power received from Sun per m^{2} surface area of a geosynchronous satellite in nearly __________ watt.
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500
2000
1000
⇒ Tropospheric scatter is used with frequencies in the range of
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⇒ The effective electrical length of an antenna is __________ its physical length
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⇒ Three phase four wire induction energy meter is used to measure
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⇒ The polar plot of G(jω) = 1/jω is
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⇒
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 true, R is false
A is false, R is true
⇒ The counter shown in the given figure is built using 4 -ve edge triggered toggle FFs. The FF can be set asynchronously when R = 0. The combinational logic required to realize a modulo-13 counte
F = Q_{4} Q_{3} Q_{2} Q_{1}
F = Q_{4} + Q_{3} + Q_{2} + Q_{1}
F = Q_{4} + Q_{3} + Q_{2} + Q_{1}
F = Q_{4}Q_{3}Q_{2}Q_{1}
⇒ A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The voltage multiplication is
25
50
125
250
⇒
Match the following:
List I (F.T and F.S) | List II (Properties) | ||
---|---|---|---|
A. | Fourier Series | 1. | Discrete, Periodic |
B. | Fourier Transform | 2. | Continuous, Periodic |
C. | Discrete Time Fourier | 3. | Discrete aperiodic |
D. | Discrete Fourier Transform | 4. | Continuous, aperiodic |
A-3, B-4, C-2, D-1
A-1, B-2, C-4, D-3
A-3, B-2, C-4, D-1
A-1, B-4, C-2, D-3
⇒ In a directional coupler
isolation (dB) equals coupling plus directivity
coupling (dB) equals isolation plus directivity
directivity (dB) equals isolation plus coupling
isolation (dB) equals (coupling) (directivity)
⇒ A meter having 0-1000 μA range and 1000 Ω resistance is required to be changed to 0-100 mA meter. The value of shunt resistance is about
1 Ω
10 Ω
99 Ω
100 Ω
⇒ In the graph of figure, the total number of tree
4
5
6
8
⇒ In a network with twelve circuit elements and five nodes, what is the minimum number of mesh equations?
24
12
10
8
⇒ The dual of a loop is
twig
node pan
mesh
tree
⇒ A ship-to-ship communication system is plagued by fading. The best solution seems to be the use of
space diversity
frequency diversity
a broad band antenna
a more directional antenna
⇒ Which of the following bridges is also used in an oscillator?
Maxwell
Schering
Hay
Wien
⇒ Breakdown in dielectric may be
electrical breakdown
thermal breakdown
electrochemical breakdown
any of the above
⇒ In SSB generation, the most commonly used filter is
low pass
RC
LC
mechanical
⇒ A network has two sources of different frequencies. The only method of analysis which can be used to find current and voltages of different branches is the use of
Kirchoff's laws
Superposition theorem
Thevenin's theorem
Tellegen's theorem
⇒ A geostationary satellite is one which
hangs motionless in space about 36000 km about Earth
travels around the Earth in 24 hours
remains stationary above the Earth
appears stationary to everybody on Earth
⇒ IC 74181 has two select lines.
TRUE
FALSE
⇒ A microprocessor can understand instruction written in
machine language only
mnemonics operation codes only
high language only
both machine language and mnemonics operation codes
⇒ The most commonly used moving iron instruments are
repulsion type
attraction type
a combination of attraction and repulsion type
none of the above
⇒ In a magnetron the magnetic flux density is of the order of
1 mWb/s
1 Wb/m^{2}
10^{6} m/s
10^{12} m/s
⇒ An air-filled rectangular waveguide has dimensions 8cm x 10cm . The wavelength of waveguide at frequency 3 GHz
25 cm
100 cm
16.13 cm
23.09 cm
⇒ The maximum temperature limit of class B insulation is
90°C
105°C
120°C
130°C
⇒
Match the following:
Microwave Measuring Instruments | Measurements Effected | ||
---|---|---|---|
A. | Bolometer | 1. | Reflection coefficients |
B. | VSWR meter | 2. | Half power beam widths |
C. | Cavity wave meter | 3. | Microwave power |
D. | Pattern recorder | 4. | Microwave frequency |
A-2, B-1, C-4, D-3
A-3, B-1, C-4, D-2
A-2, B-4, C-1, D-3
A-3, B-4, C-1, D-2
⇒ 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
⇒ A 12 bit ADC is used to convert analog voltage of 0 to 10 V into digital. The resolution is
2.44 mV
24.4 mV
1.2 V
none of the above
⇒ A polyphase wattmeter basically consists of two wattmeters. The moving system of two wattmeters
are common
are separate
are generally common
are generally separate
⇒ Power received from Sun per m^{2} surface area of a geosynchronous satellite in nearly __________ watt.
100
500
2000
1000
⇒ Tropospheric scatter is used with frequencies in the range of
VLF
HF
UHF
VHF
⇒ The effective electrical length of an antenna is __________ its physical length
greater than
equal to
less than
none of the above
⇒ Three phase four wire induction energy meter is used to measure
energy in 3 phase balanced star load
energy in 3 phase balanced delta load
energy in 3 phase unbalanced load
either (a) or (b)
⇒ The polar plot of G(jω) = 1/jω is
positive imaginary axis
positive real axis
negative imaginary axis
negative real axis
⇒
Assertion (A): ECL is fast as compared to TTL.
Reason (R): ECL dissipates less power than TTL.
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 true, R is false
A is false, R is true
⇒ The counter shown in the given figure is built using 4 -ve edge triggered toggle FFs. The FF can be set asynchronously when R = 0. The combinational logic required to realize a modulo-13 counte
F = Q_{4} Q_{3} Q_{2} Q_{1}
F = Q_{4} + Q_{3} + Q_{2} + Q_{1}
F = Q_{4} + Q_{3} + Q_{2} + Q_{1}
F = Q_{4}Q_{3}Q_{2}Q_{1}
⇒ A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The voltage multiplication is
25
50
125
250