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At present, the radio-frequency band mainly used by most satellites is | |
A. | EHF [Wrong Answer] |
B. | UHF [Wrong Answer] |
C. | VHF [Wrong Answer] |
D. | SHF [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 :
⇒ If a = 0.995, I_{E} = 10 mA, I_{CO} = 0.5 mA, then I_{CEO} will be
100 μA
25 μA
10.1 μA
10.5 μA
⇒ In which frequency range is the noise figure in a transistor minimum
intermediate frequencies
low frequencies
high frequencies
very high frequencies
⇒ If a function has only cosine terms, it must satisfy the equation
f(t) = -f(t)
f(-t) = f(t)
f(-t) = -f(t)
none of the above
⇒ Two currents have the same peak value. Wave 1 is sinusoidal and wave 2 is rectangular. The ratio of their heating effects are
0.0423611111111111
1 : 2
0.0430555555555556
0.000711805555555555
⇒ If input frequency is 50 Hz, the frequency of output wave in a full wave diode rectifier circuit is
25 Hz
50 Hz
100 Hz
200 Hz
⇒ Lag compensation permits a high gain at low frequencies.
TRUE
FALSE
⇒
A-1, B-2, C-3
A-2, B-3, C-1
A-1, B-3, C-2
A-2, B-1, C-3
⇒ A system with transfer function H(z) has impulse response h(.) defined as h(2) = 1, h(3) = -1 and h(k) = 0 otherwise. Consider the following statem
Only S2 is true
Both S1 and S2 are false
Both S1 and S2 are true, and S2 is a reason for S1
Both S1 and S2 are true, but S2 is not a reason for S1
⇒ If f_{h}(t) is Hilbert transform of f(t), then Hilbert transform of f_{h}(t) is
-f(t)
+f(t)
f^{2}(t)
f(t)
⇒ A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about
13 mm
1.3 mm
130 mm
none of the above
⇒ Calculate i(t) for t ≥ 0, assuming the switch has been in position A for a long time at t = 0, the switch is moved to positio
1 + e^{-5 x 103t}
e^{-5 x 103t}
1.11 e^{-5 x 103t}
1.11 (1 - e^{-5 x 103t})
⇒ In the given figure reflection coefficient at loa
0.6
-0.6
0.4
-0.4
⇒
Both A and R are true and R is correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true
⇒ Consider the following statements regarding registers and latches:
1 only
1 and 3
2 and 3
3 and 4
⇒ For a junction FET in the pinch off region as the drain voltage is increased, the drain current
becomes zero
abruptly decreases
abruptly increases
remains constant
⇒ The decimal equivalent of ABC_{16} is
348
2583
2748
33
⇒ (FE35)_{16} XOR (CB15)_{16} is equal to
(3320)_{16}
(FE35)_{16}
(FF50)_{16}
(3520)_{l6}
⇒
A-1, B-2, C-3, D-4
A-4, B-3, C-2, D-1
A-3, B-4, C-1, D-2
A-4, B-3, C-1, D-2
⇒ The polar plot of G(jω) = 1/jω is
positive imaginary axis
positive real axis
negative imaginary axis
negative real axis
⇒ What do the contents of instruction register specify?
Operand for the instruction being executed
Op code for the instruction being executed
Op code for the instruction to be executed next
Operand for the instruction to be executed next
⇒ In an R-L-C series circuit, R = 2/L/C . If R is doubled
the response will become underdamped
the response will become overdamped
the response will be critically damped
the response may be under damped or overdamped
⇒ A voltage v = 100 sin ωt + 10 sin 5 ωt is applied to a pure capacitor having capacitance of 1 μF. If ω = 314 rad/sec, the current through the capacitor is
0.0314 cos 314 t + 0.0157 cos 1570 t
0.0314 sin 314 t + 0.0157 sin 1570 t
0.0314 cos 314 t + 0.0314 cos 1570 t
0.0157 cos 314 t + 0.0157 cos 1570 t
⇒ 74 HC series can sink upto 4 mA. The 74 LS series has I_{IL(max)} - 0.4 mA. How many 74 LS inputs be driven by 74 HC output?
100
none
8
10
⇒ Which distortion is least objectionable in case of audio amplifiers?
Phase distortion
Frequency distortion
Harmonic distortion
Inter-modulation distortion
⇒ Consider Pole zero diagram as shown, If two Poles are moved in opposite direction towards ω = p/2 and -p/2, the filter wil
change to high pass filter
change to Band Pass filter
remains same
change to LPF
⇒ In plotting line spectrum
a graph of complex number F_{n} versus frequency is plotted
a graph of |F_{n}| versus frequency is plotted
a graph of the angle of F_{n} versus frequency is plotted
two graphs viz |F_{n}| versus frequency and the phase angle of Fn versus frequency are plotted
⇒ The frequency tolerance for the RF carrier in the standard AM radio broadcast band is
zero
+20 Hz
+1000 Hz
+25 Hz
⇒ In a transistor which of the following region is very lightly doped and is very thin?
Emitter
Base
Collector
None of the above
⇒
A-1, B-2, C-3, D-4
A-2, B-1, C-4, D-3
A-2, B-3, C-4, D-1
A-4, B-3, C-2, D-1
⇒ A separately excited dc motor is run from a dc source through a chopper. At 600 rpm and rated torque, the duty cycle of chopper is 0.8. At 600 rpm and half the rated torque, the duty cycle is likely to be
0.9
0.8
0.75
0.6
⇒ If a = 0.995, I_{E} = 10 mA, I_{CO} = 0.5 mA, then I_{CEO} will be
100 μA
25 μA
10.1 μA
10.5 μA
⇒ In which frequency range is the noise figure in a transistor minimum
intermediate frequencies
low frequencies
high frequencies
very high frequencies
⇒ If a function has only cosine terms, it must satisfy the equation
f(t) = -f(t)
f(-t) = f(t)
f(-t) = -f(t)
none of the above
⇒ Two currents have the same peak value. Wave 1 is sinusoidal and wave 2 is rectangular. The ratio of their heating effects are
0.0423611111111111
1 : 2
0.0430555555555556
0.000711805555555555
⇒ If input frequency is 50 Hz, the frequency of output wave in a full wave diode rectifier circuit is
25 Hz
50 Hz
100 Hz
200 Hz
⇒ Lag compensation permits a high gain at low frequencies.
TRUE
FALSE
⇒
Match the following:
List I (Modes) | List II (Characteristic) | ||
---|---|---|---|
A. | Evanescent | 1. | Rectangular waveguide does not support |
B. | Dominant mode | 2. | No wave propagation |
C. | TM_{10} and TM_{01} | 3. | Lowest cut-off frequency |
A-1, B-2, C-3
A-2, B-3, C-1
A-1, B-3, C-2
A-2, B-1, C-3
⇒ A system with transfer function H(z) has impulse response h(.) defined as h(2) = 1, h(3) = -1 and h(k) = 0 otherwise. Consider the following statem
Only S2 is true
Both S1 and S2 are false
Both S1 and S2 are true, and S2 is a reason for S1
Both S1 and S2 are true, but S2 is not a reason for S1
⇒ If f_{h}(t) is Hilbert transform of f(t), then Hilbert transform of f_{h}(t) is
-f(t)
+f(t)
f^{2}(t)
f(t)
⇒ A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about
13 mm
1.3 mm
130 mm
none of the above
⇒ Calculate i(t) for t ≥ 0, assuming the switch has been in position A for a long time at t = 0, the switch is moved to positio
1 + e^{-5 x 103t}
e^{-5 x 103t}
1.11 e^{-5 x 103t}
1.11 (1 - e^{-5 x 103t})
⇒ In the given figure reflection coefficient at loa
0.6
-0.6
0.4
-0.4
⇒
Assertion (A): Charge is dual of flux.
Reason (R): Short circuit is dual of open circuit.
Both A and R are true and R is correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true
⇒ Consider the following statements regarding registers and latches:
- Registers are made of edge-triggered FFs, whereas latches are made from level-triggered FFs.
- Registers are temporary storage devices whereas latches are not.
- A latch employs cross-coupled feedback connections.
- A register stores a binary word whereas a latch does not.
1 only
1 and 3
2 and 3
3 and 4
⇒ For a junction FET in the pinch off region as the drain voltage is increased, the drain current
becomes zero
abruptly decreases
abruptly increases
remains constant
⇒ The decimal equivalent of ABC_{16} is
348
2583
2748
33
⇒ (FE35)_{16} XOR (CB15)_{16} is equal to
(3320)_{16}
(FE35)_{16}
(FF50)_{16}
(3520)_{l6}
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | h_{ie} | 1. | 49 |
B. | h_{re} | 2. | 25 x 10^{-6}siemens |
C. | h_{fe} | 3. | 2.4 x 10^{-4} |
D. | h_{oe} | 4. | 1000 ohms |
A-1, B-2, C-3, D-4
A-4, B-3, C-2, D-1
A-3, B-4, C-1, D-2
A-4, B-3, C-1, D-2
⇒ The polar plot of G(jω) = 1/jω is
positive imaginary axis
positive real axis
negative imaginary axis
negative real axis
⇒ What do the contents of instruction register specify?
Operand for the instruction being executed
Op code for the instruction being executed
Op code for the instruction to be executed next
Operand for the instruction to be executed next
⇒ In an R-L-C series circuit, R = 2/L/C . If R is doubled
the response will become underdamped
the response will become overdamped
the response will be critically damped
the response may be under damped or overdamped
⇒ A voltage v = 100 sin ωt + 10 sin 5 ωt is applied to a pure capacitor having capacitance of 1 μF. If ω = 314 rad/sec, the current through the capacitor is
0.0314 cos 314 t + 0.0157 cos 1570 t
0.0314 sin 314 t + 0.0157 sin 1570 t
0.0314 cos 314 t + 0.0314 cos 1570 t
0.0157 cos 314 t + 0.0157 cos 1570 t
⇒ 74 HC series can sink upto 4 mA. The 74 LS series has I_{IL(max)} - 0.4 mA. How many 74 LS inputs be driven by 74 HC output?
100
none
8
10
⇒ Which distortion is least objectionable in case of audio amplifiers?
Phase distortion
Frequency distortion
Harmonic distortion
Inter-modulation distortion
⇒ Consider Pole zero diagram as shown, If two Poles are moved in opposite direction towards ω = p/2 and -p/2, the filter wil
change to high pass filter
change to Band Pass filter
remains same
change to LPF
⇒ In plotting line spectrum
a graph of complex number F_{n} versus frequency is plotted
a graph of |F_{n}| versus frequency is plotted
a graph of the angle of F_{n} versus frequency is plotted
two graphs viz |F_{n}| versus frequency and the phase angle of Fn versus frequency are plotted
⇒ The frequency tolerance for the RF carrier in the standard AM radio broadcast band is
zero
+20 Hz
+1000 Hz
+25 Hz
⇒ In a transistor which of the following region is very lightly doped and is very thin?
Emitter
Base
Collector
None of the above
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | AM-DSB FC | 1. | 2 |
B. | WBFM | 2. | 1 |
C. | PCM | 3. | 3m |
D. | AM-DSB | 4. | 2^{2N} |
A-1, B-2, C-3, D-4
A-2, B-1, C-4, D-3
A-2, B-3, C-4, D-1
A-4, B-3, C-2, D-1
⇒ A separately excited dc motor is run from a dc source through a chopper. At 600 rpm and rated torque, the duty cycle of chopper is 0.8. At 600 rpm and half the rated torque, the duty cycle is likely to be
0.9
0.8
0.75
0.6