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If the plate supply voltage for a plate modulated class C amplifier is E, the maximum plate cathode voltage could be almost as high as | |
A. | E [Wrong Answer] |
B. | 2 E [Wrong Answer] |
C. | 3 E [Correct Answer] |
D. | 4 E [Wrong Answer] |
View Answer
Explanation:-
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ If V = 4 in the figure, the value of I_{S} is given
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⇒ The current in a p-n junction diode with V volts applied in p region relative to n region (where I_{0} is reverse saturation current, m is ideality factor, k is Boltzmann's constant, T is absolute temp and q is charge on electron) is
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⇒ Which of the following is equivalent to AND-OR realization?
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⇒ The current in a p-n junction diode with V volts applied in p region relative to n region (where I_{0} is reverse saturation current, m is ideality factor, k is Boltzmann's constant, T is absolute temp and q is charge on electron) is
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⇒ Which of the following is equivalent to AND-OR realization?
NAND-NOR
NOR-NOR
NOR-NAND
NAND-NAND
⇒ An MTI compares a set of received echos with those received during the previous sweep.
TRUE
FALSE
⇒ Radiation resistance of half-wave dipole (λ/2) antenna is in free space
73 Ω
120 p
36.5 Ω
70 Ω
⇒ Whenever a wave is incident on a perfect conductor then the reflection coefficient is
1
0
1 < 180°
depend upon η_{1}, η_{2}
⇒ Thermal noise is independent of
temperature
bandwidth
centre frequency
Boltzmann constant
⇒ The law J = σE, where J is current density, σ is electrical conductivity and E is field strength is
Ohm's law
Gauss law
Ampere's law
Biot-Savart law
⇒
Assertion (A): Ideal current sources and ideal voltage sources do not exist in reality.
Reason (R): All sources have finite internal impedances.
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Both A and R are individually true but R is not the correct explanation of A
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A is false but R is true
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⇒ When a P-N junction is unbiased, the junction current at equilibrium is
zero as no charges cross the junction
zero as equal number of carriers cross the barrier
mainly due to diffusion of majority carriers
mainly due to diffusion of minority carriers
⇒ The signal input to a given amplifier is made up of 100 mΩ signal power and 1 mΩ noise power. The amplifier contributes an additional 100 mΩ of noise and has a power gain of 20 dB. The output signal-to-noise ratio is
100
50
10
5
⇒ Time delay produced by an instruction code given below using 2 MHz clock
1783 μs
1787 μs
1781 μs
1797 μs
⇒ In a single phase half wave converter feeding resistive load and full wave converter (M - 2 connection) feeding a resistive load the circuit conditions are similar. The firing angle is a. Then the waveshapes of voltages across thyristors
are similar
are not similar
may be similar or dissimilar
are similar only for some values of a
⇒ The audio frequency range is
5 Hz to 1 kHz
50 Hz to 20 kHz
16 Hz to 20 kHz
0 Hz to 20 kHz
⇒ The Hilbert transform of cos ω_{1}t + sin ω_{2}t is
sin ω_{1}t + cos ω_{2}t
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⇒ Which one of the following bipolar transistors has the highest current gain bandwidth Product (f_{r}) for similar geometry?
NPN germanium transistor
NPN silicon transistor
PNP germanium transistor
PNP silicon transistor
⇒ For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the velocity propagation will be
15.8303 km/s
15.830 km/s
1.583 km/s
0.1583 km/s
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | FM | 1. | slope-overload |
B. | DM | 2. | μ law |
C. | PSK | 3. | Envelope detector |
D. | PCM | 4. | Capture effect |
5. | Hilbert transform | ||
6. | Matched filter. |
A-5, B-1, C-6, D-4
A-4, B-6, C-1, D-5
A-4, B-1, C-6, D-2
A-6, B-3, C-4, D-2
⇒ ROC of sequence x[n] = (3)^{n} ∪[n] + (4)^{n} ∪[- n - 1]
|z| > 4
3 < |z| < 4
|z| < 4
|z| > 3
⇒ Which of the following material can be used in cable shields?
Copper
Aluminium
Cast iron
Lead
⇒ In figure, V_{1} = 40 V when R = 10 Ω, if R = 0, V_{2} wil
40 V
30 V
20 V
10 V
⇒ In figure, the short circuit current through terminal AB wil
1.5 A
0.125
0.0833333333333333
0.0416666666666667
⇒ The leads in a TRIAC are denoted by
anode cathode, gate
T_{1} T_{2}, gate
T_{1}, T_{2}, anode
T_{1}, T_{2}, T_{3}
⇒ Addition of 0.3 to 3.5% silicon to iron
increases the electrical resistivity of iron
decreases the electrical resistivity of iron
does not change electrical resistivity of iron
silicon can't be added with iron
⇒ Consider the following statements for a driving point function F(jω):
- Re F(jω) is an even function of ω and is 0 or positive for all values of ω.
- Im F(jω) is an even function of ω and is 0 or positive for all values of ω.
- Re F(jω) is an odd function of ω and is 0 or negative for all values of ω.
- Re F(s) = 0 for Re s = 0.
1 only
1 and 4
2, 2 and 4
4 only
⇒ A linear system is characterized by H(ω) = Be^{-2ω2} the system is physically
unrealizable
realizable
depends upon B
depends upon constant 2
⇒ In a receiver, which of the following device has IF input but RF output?
Demodulator
Loudspeaker
Audio amplifier
Frequency changer
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | lag compensation | 1. | Exterior of unit circle |z| = 1 |
B. | lead compensation | 2. | PD control |
C. | stability | 3. | Non-minimum phase |
D. | Instability | 4. | Left half s plane |
5. | PI control |
A-2, B-5, C-1, D-3
A-3, B-1, C-2, D-5
A-1, B-2, C-3, D-4
A-5, B-2, C-4, D-1
⇒ Line of sight transmission is used in
radio frequencies below 1 MHz
VHF only
audio signals only
VHF and UHF