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In a resistance loaded amplifier, the gain decreases at high frequencies because | |
A. | decreasing reactance of the stray C_{T} [Correct Answer] |
B. | increasing reactance of the stray C_{T} [Wrong Answer] |
C. | increasing reactance of C_{T} [Wrong Answer] |
D. | decreasing reactance of C_{T} [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 :
⇒ If ωε is the displacement current factor and s is conduction current density factor then which of the following statements is incorrect?
For a lossless dielectric σ = 0
For an imperfect dielectric σ = 0
For a dielectric ωε >> σ
For a semiconductor ωε = σ
⇒ Which of the following is equivalent to AND-OR realization?
NAND-NOR
NOR-NOR
NOR-NAND
NAND-NAND
⇒ In a series R, L, C circuit the impedance triangle is the same when X_{L} < X_{C} and X_{L} > X_{C} .
TRUE
FALSE
⇒ A bipolar differential amplifier uses a transistor having β_{0} = 200, I_{CQ} = 100 mA, |A_{dm}| = 500 and CMRR = 80 dB. The value of R_{c} and R_{E} will be respectively __________ .
1.25 kΩ, 1.25 MΩ
125 kΩ, 1.25 MΩ
1.25 MΩ, 1.25 kΩ
3.25 kΩ, 3.25 MΩ
⇒ A waveguide operated below cut off frequency can be used as
phase shifter
an attenuator
an isolator
none
⇒ The total inductance of two coils is 60 mH in series aiding connection and 40 mH in series opposing connection. The mutual inductance between coils is
20 mH
10 mH
5 mH
2.5 mH
⇒ A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be
0.5 A
more than 0.5 A
less than 0.5 A
0.5 A or less
⇒ In figure which is correct at any time t
I = i_{R} + i_{L}
I = i_{R} + i_{L} i_{C}
I = i_{R} + i_{L} - i_{C}
I = i_{R} - i_{L} - i_{C}
⇒ Which of the following is the common feature between FETs and bipolars?
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None of them
⇒ For the network shown below, determine f_{Hi} and f_{HO}, if, r_{0} = ∞, C_{be} = 36 Pf, C_{bc} = 4 Pf, C_{ce} = 1 Pf, C_{wo} = 8 Pf, C_{wi} = 6 Pf<
738.24 KHz, 8.6 MHz
781.2 KHz, 10.6 MHz
838.32 KHz, 9.2 MHz
938.24 KHz, 8.2 MHz
⇒
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
R is correct but A is wrong
⇒ Poynting vector is the rate of energy flow having
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⇒ The signal x(t) = A cos (ω_{0}t + φ) is
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⇒ The polarization phenomena in Faraday rotation
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exists along perpendicular direction
exists along the axis of array
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⇒ The ac input voltage of an amplifier
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⇒ Which of the following is a valid expression in FORTRAN 77?
B * - 3
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⇒ A 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000). Then, what will be input, if the output register shows 100111 at the end of conversion.
5.85 V
6 V
5 V
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⇒ In a TWT the loss in attenuator is
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almost infinite
⇒ Volume control found on the front panel of television receivers
a ganged resistor
a variable resistor of logarithmic type
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⇒ The expression
⇒ Which one of following is a stataic system?
y(n) = x(n) - x(n - 1)
y(n) = x(2n) - x(2n-1)
y(n) = x(n - 1)
y(n) = e^{x(n)}
⇒ Which of the following is true as regards photo emission?
Velocity of emitted electrons is dependent on light intensity
Rate of photo emission is inversely proportional to light intensity
Maximum velocity of electron increases with decreasing wave length
Both holes and electrons are produced
⇒ Consider the following sets of values of E, R and C for the circuit in the given fig
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1 and 2
3 and 4
2 and 3
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⇒ Which one of following is correct condition to check the stability of sysytem in terms of impulse response?
Σ(x(n)) < ∞
Σx(n) < 0
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⇒ If V_{r} is the reverse voltage across a graded P-N Junction, then the junction capacitance c_{j} is proportional to
(V_{r})^{2}
(V_{r})^{n}
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⇒ If E_{y} is the voltage applied to Y plates, the vertical deflection of beam is proportional to
E_{y}
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⇒ For a wave propagating in air filled rectangular waveguide.
guide wavelength is never less than free space wavelength.
wave impedance is never less than the free space impedance
TEM mode is possible if the dimension of the waveguide are properly chosen.
propagation constant is a real quantity.
⇒ The equation D = ∈_{0}∈_{r} E refers only to isotropic materials.
TRUE
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⇒ L[c_{1}f_{1}(t) + c_{2}f_{2}(t)] =
c_{1} F_{1} (jω) + c_{2} F_{2}(jω)
c_{1} F_{1} (jω) - c_{2} F_{2}(jω)
c_{1} F_{1} (jω) + c_{2} F_{2}(jω) + c_{1}c_{2}
c_{1} F_{1} (jω) + c_{2} F_{2}(jω) + c_{1}/c_{2}
⇒ If ωε is the displacement current factor and s is conduction current density factor then which of the following statements is incorrect?
For a lossless dielectric σ = 0
For an imperfect dielectric σ = 0
For a dielectric ωε >> σ
For a semiconductor ωε = σ
⇒ Which of the following is equivalent to AND-OR realization?
NAND-NOR
NOR-NOR
NOR-NAND
NAND-NAND
⇒ In a series R, L, C circuit the impedance triangle is the same when X_{L} < X_{C} and X_{L} > X_{C} .
TRUE
FALSE
⇒ A bipolar differential amplifier uses a transistor having β_{0} = 200, I_{CQ} = 100 mA, |A_{dm}| = 500 and CMRR = 80 dB. The value of R_{c} and R_{E} will be respectively __________ .
1.25 kΩ, 1.25 MΩ
125 kΩ, 1.25 MΩ
1.25 MΩ, 1.25 kΩ
3.25 kΩ, 3.25 MΩ
⇒ A waveguide operated below cut off frequency can be used as
phase shifter
an attenuator
an isolator
none
⇒ The total inductance of two coils is 60 mH in series aiding connection and 40 mH in series opposing connection. The mutual inductance between coils is
20 mH
10 mH
5 mH
2.5 mH
⇒ A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be
0.5 A
more than 0.5 A
less than 0.5 A
0.5 A or less
⇒ In figure which is correct at any time t
I = i_{R} + i_{L}
I = i_{R} + i_{L} i_{C}
I = i_{R} + i_{L} - i_{C}
I = i_{R} - i_{L} - i_{C}
⇒ Which of the following is the common feature between FETs and bipolars?
Have low input impedance
Have low voltage gain
Are difficult to bias
None of them
⇒ For the network shown below, determine f_{Hi} and f_{HO}, if, r_{0} = ∞, C_{be} = 36 Pf, C_{bc} = 4 Pf, C_{ce} = 1 Pf, C_{wo} = 8 Pf, C_{wi} = 6 Pf<
738.24 KHz, 8.6 MHz
781.2 KHz, 10.6 MHz
838.32 KHz, 9.2 MHz
938.24 KHz, 8.2 MHz
⇒
Assertion (A): Laplace transform of impulse function is equal to area under the impulse.
Reason (R): An impulse function whose area is unity is called unit impulse function.
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
R is correct but A is wrong
⇒ Poynting vector is the rate of energy flow having
W/m^{2}
W-m
kWh/s
W/m
⇒ The signal x(t) = A cos (ω_{0}t + φ) is
energy signal
power signal
energy Power
none
⇒ The polarization phenomena in Faraday rotation
is non-reciprocal
exists along perpendicular direction
exists along the axis of array
does not exist
⇒ The ac input voltage of an amplifier
is always equal to ac signal voltage
may be equal to or more than ac signal voltage
is always less than ac signal voltage
may be equal or more or less than ac signal voltage
⇒ Which of the following is a valid expression in FORTRAN 77?
B * - 3
B * (- 3)
B * * - 3
B * + 2
⇒ A 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000). Then, what will be input, if the output register shows 100111 at the end of conversion.
5.85 V
6 V
5 V
10 V
⇒ In a TWT the loss in attenuator is
almost equal to forward gain of tube
much less than forward gain of tube
much higher than forward gain of tube
almost infinite
⇒ Volume control found on the front panel of television receivers
a ganged resistor
a variable resistor of logarithmic type
a variable resistor of linear type
a trimmer potentiometer
⇒ The expression
A^{2} + B^{2} - 3 AB
when written is Pascal should be written asA * A + B * B - 3 A * B
A * A + B * B - 3.0 A * B
A * A + B * B - 3.0 * A * B
A * A + B * A - 3 * A * B
⇒ Which one of following is a stataic system?
y(n) = x(n) - x(n - 1)
y(n) = x(2n) - x(2n-1)
y(n) = x(n - 1)
y(n) = e^{x(n)}
⇒ Which of the following is true as regards photo emission?
Velocity of emitted electrons is dependent on light intensity
Rate of photo emission is inversely proportional to light intensity
Maximum velocity of electron increases with decreasing wave length
Both holes and electrons are produced
⇒ Consider the following sets of values of E, R and C for the circuit in the given fig
1 and 4
1 and 2
3 and 4
2 and 3
⇒ If a sequence is causal then ROC is (where a is any number)
|z| > a
|z| < a
|z| = a
Entire Plane
⇒ Which one of following is correct condition to check the stability of sysytem in terms of impulse response?
Σ(x(n)) < ∞
Σx(n) < 0
Σx(n) = 0
Σx(n) = ∞
⇒ If V_{r} is the reverse voltage across a graded P-N Junction, then the junction capacitance c_{j} is proportional to
(V_{r})^{2}
(V_{r})^{n}
(V_{r})^{-n}
(V_{r})^{3/2}
⇒ If E_{y} is the voltage applied to Y plates, the vertical deflection of beam is proportional to
E_{y}
E_{y}
E_{y}^{1.5}
E_{y}^{2}
⇒ For a wave propagating in air filled rectangular waveguide.
guide wavelength is never less than free space wavelength.
wave impedance is never less than the free space impedance
TEM mode is possible if the dimension of the waveguide are properly chosen.
propagation constant is a real quantity.
⇒ The equation D = ∈_{0}∈_{r} E refers only to isotropic materials.
TRUE
FALSE
⇒ L[c_{1}f_{1}(t) + c_{2}f_{2}(t)] =
c_{1} F_{1} (jω) + c_{2} F_{2}(jω)
c_{1} F_{1} (jω) - c_{2} F_{2}(jω)
c_{1} F_{1} (jω) + c_{2} F_{2}(jω) + c_{1}c_{2}
c_{1} F_{1} (jω) + c_{2} F_{2}(jω) + c_{1}/c_{2}