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Consider the following statements as regards IF in radio receivers
| |
A. | 1, 2, 3, 4 [Wrong Answer] |
B. | 1, 2, 3 [Correct Answer] |
C. | 2, 3, 4 [Wrong Answer] |
D. | 1, 3, 4 [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ If V_{a} = 10 ∠0, V_{b} = 10 ∠ -120° and V_{c} = 10 ∠ -240°, then V_{a2} and V_{a0} are
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⇒ Which of the following subtraction operations do not result in F_{16}?
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low
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⇒ The load impedance Z_{L} of a CE amplifier has R and L in series. The phase difference between output and input will be
180°
0
more than 90° but less than 180°
more than 180° but less than 270°
⇒ For a second order instrument, the optimum range of ξ (damping ratio), which gives good frequency response over a wide range of frequencies is
0.5 to 0.6
0.6 to 0.7
0.7 to 0.8
0.8 to 1.0
⇒ ∈_{r} is determined by the atomic structure of the dielectric.
TRUE
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⇒ The circuit shown in figure
oscillate at 456 kHz
oscillate at 228 kHz
oscillate at microwave frequency
not oscillate
⇒ The disadvantage of counter type ADC as compared to comparator ADC is that
resolution is low
conversion time is more
circuit is more complex
stability is low
⇒ CATV stands for
Common Antenna Television
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⇒ D/A converters are generally
weighted resistor network
binary ladder network
either (a) or (b)
neither (a) nor (b)
⇒ Which of the following statements about the matched filter in a communication receiver are correct?
- Its impulse response depends on the signed shape
- It maximizes the SNR at the detection shape.
- It produces ISI.
- It may produce phase error if synchronization is improper.
1 and 4 only
1 and 2 only
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⇒ Efficiency of class A power amplifier is very poor.
TRUE
FALSE
⇒ A tachometer has a sensitivity of 4 V/1000 rpm. Express the gain constant of the tachometer in the units volts/(rad/sec).
0.0489
0.0381
2
none of these
⇒ In a 741 OP-amp, there is 20 dB/decade fall-off starting at a relatively low frequency. This is due to
applied load
internal compensation
impedance of the source
power dissipation in the chip
⇒ A delta connection contains three impedances of 60 Ω each. The impedances of equivalent star connection will be
15 Ω
20 Ω
30 Ω
40 Ω
⇒ The resonance frequency is
ω_{r} = a
ω_{r} = b
ω_{r} = k
ω_{r} = ba
⇒ A sample of N type semiconductor has electron density of 6.25 x 10^{8}/cm^{2} at 300 K. If the intrinsic concentration of carriers in this sample is 2.5 x 10^{13}/cm^{3} at this temperature, the hole density works out to be
10^{6}/cm^{3}
10^{8}/cm^{3}
10^{10}/cm^{3}
10^{l2}/cm^{3}
⇒ Two similar coupled coils are connected in series. The total inductance in series aiding connection is 100 mH. If currents is 3 A, the energy stored in magnetic field is
0.9 J
0.45 J
0.225 J
1.8 J
⇒ In the circuit of figure. The current supplied by battery at t = &infin
0
0.208333333333333
less than 5 A
very large
⇒ Photoelectric effect occurs only in semiconductors and not in metals.
TRUE
FALSE
⇒ For the system with given characteristic equat
3, 2, 0
4, 0, 1
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⇒ The receiver of a pulsed RADAR can detect signal power in the order of
1 W
0.1 W
10^{-5} W
10^{-12} W
⇒
Match the following:
List I (Operation in Basic) | List II (Priority) | ||
---|---|---|---|
A. | Exponentiation | 1. | 1 |
B. | Multiplication and division | 2. | 2 |
C. | Addition and subtraction | 3. | 3 |
D. | Expression within parenthesis | 4. | 4 |
A-1, B-2, C-3, D-4
A-2, B-3, C-1, D-4
A-4, B-3, C-2, D-1
A-2, B-3, C-4, D-1
⇒ Which of the following subtraction operations do not result in F_{16}?
- (BA)_{16} - (AB)_{161 and 21 and 32 and 31, 2 and 3}
⇒ In the given fi
0 rad/sec
2 rad/sec
3/2 rad/sec
None of these
⇒ A binary with a digits, all of which are unity has the value
n^{2} - 1
2^{n}
2(^{n - 1})
2^{n} - 1
⇒ In the given figure,
(A + B)C + DE
AB + C(D + E)
(A + B)C + D + E
none of the above
⇒ If the inputs to a 2 input XOR gate are high then, the output is high.
TRUE
FALSE