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Assertion (A): For large signal variations an amplifier circuit has to be analysed graphically Reason (R): The output characteristics of a transistor is nonlinear. | |
A. | Both A and R are correct and R is correct explanation for A [Correct Answer] |
B. | Both A and R are correct but R is not correct explanation for A [Wrong Answer] |
C. | A is correct R is wrong [Wrong Answer] |
D. | A is wrong R is correct [Wrong Answer] |
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Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
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⇒ If a driving point function N(s) = p(s)/q(s), then
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360°
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⇒ Phase modulation is commonly-used for data transmission mainly because
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it is resistant to the effects of noise
demodulation is very easy
it gives highest data rates that can be transmitted over a given channel
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M_{f}
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⇒ A potential of 7 V is applied to a silicon diode. A resistance of 1 kΩ is also connected in series. If the diode is forward biased, the current in the circuit is
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6.3 mA
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84 W
97.44 W
100 W
77.44 W
⇒ The mean life time of the minority carriers is in the range of a few
seconds
milli seconds
micro seconds
nano seconds
⇒ The output y(t) of a continuous-time system S for the input x(t) is given
S is linear and time-invariant
S is linear and time-varying
S is non-linear and time-invariant
S is non-linear and time-varying
⇒ The emitter follower steps up the impedance by a factor of
a
β
a β
a/β
⇒ In figure, the curre
is 2 A from A to B
is 2 A from B to A
depends on the value of R
none of the above
⇒ What will be equipotential surfaces for a pair of equal and opposite line charges?
Spheres
Concentric cylinders
Non-concentric cylinders
None of the above
⇒ It is required to measure pressure using LVDT. The additional device needed is
strain gauge
pitot tube
bourden tube
rotameter
⇒ In digital TV digital imaging standard comprises
six profiles and four levels
four levels and six profiles
six profiles and six levels
four profiles and four levels
⇒ A cordless telephone using separate frequencies for transmission in base and portable units is known as
duplex arrangement
half duplex arrangement
either (a) or (b)
neither (a) nor (b)
⇒ The voltage of the source in circuit shown __________ if i(t) = - 20e^{-2t46.6 e-2t47 e-2t50 e-2t0}
⇒ In figure, V_{0zero5.7 V6.9 V12.6 V}
⇒ Output of a phase splitter is
a pair of sine waves of unequal amplitude
a pair of sine waves of equal amplitudes
a pair of sine waves of equal amplitudes and opposite phase
a pair of sine waves of unequal amplitudes and opposite phase
⇒ For an ideal noise free transistor amplifier the noise factor is
zero
zero dB
1 dB
depends on other factors
⇒ A non-inverting voltage feedback amplifier is a
voltage amplifier
current amplifier
current to voltage converter
voltage to current converter
⇒ A synchro transmitter receiver unit is a
two phase ac device
3 phase ac device
dc device
1 phase ac device
⇒ A Varactor diode has
a fixed capacitance
a fixed inductance
a voltage variable capacitance
a current variable inductance
⇒ The following components are used to measure power output of a 2 kW TWT amplifier
- TWT
- Low pass/High pass filter
- Low power 20 dB attenuator
- 40 dB directional coupler with matched load
- Power meter.
1, 4, 2, 3, 5
1, 3, 4, 2, 5
1, 2, 4, 3, 5
1, 4, 3, 2, 5
⇒ The impulse response of discrete time system is x[n] = (4)^{n} ∪[3 - n], the system is
casual
stable
stable and casual
stable and non-casual
⇒ Consider the circuit shown below of 2 : 1 MUX is given by the function g = ac + bc
X ⊕ Y
XY + EXY
XE + XY
none of these