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The pre-emphasis in FM aids in providing extra noise immunity by | |
A. | emphasizing only the higher frequency components [Wrong Answer] |
B. | emphasizing the entire frequency band [Wrong Answer] |
C. | emphasizing only the lower frequency band [Correct Answer] |
D. | cutting down the low frequency noise [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 :
⇒ The signal m(t) = 10 cos 100 pt is sampled at the rate of F_{s} = 75 H_{z, } then determine signal after sampling.
4 cos 100 pt + 8 sin 200 pt
4 cos 100 pt + 8 sin 200 pt + cos 75 pt
4 cos 25 pt + 8 sin 50 pt + cos 75 pt
none
⇒ A digital voltmeter has a 4 1/2 digit display. The 1 V range can measure voltage up to
0.9999 V
1.9999 V
0.199 V
9.999 V
⇒ In binary data transmission DPSK is preferred to PSK because
a coherent carrier is not required to the generated at the receiver
for a given energy per bit, the probability for zero is less
the 180° phase shifts of the carrier
more protection is provided against impulse noise
⇒ While selecting a memory chip the feature which should be examined is
capacity
ac characteristics
dc characteristics
all of the above
⇒ Fourier series is applicable for
periodic
finite duration
non periodic
a and b
⇒ Most of the amplification of the received signal is obtained in a superheterodyne receiver from the
IF stage
RF stage
power amplification stage
none of the above
⇒ Which of the following has highest resistivity?
Mica
Paraffin wax
Air
Mineral oil
⇒ Broadcasting antennas are generally
omnidirectional type
vertical type
horizontal type
helical
⇒ If word length is 16 bits the decimal equivalent of largest number which can be stored is
32767
32766
16383
16384
⇒ Acoustic strain gauges
have good linearity of measurement
do not have long term stability
have a large range of measurement
have an accuracy range of 0.1-1% depending on environment
⇒
A-1, B-3, C-2
A-2, B-3, C-1
A-2, B-1, C-4
A-4, B-3, C-1
⇒ In n channel JFET
I_{D} and V_{DS} are positive but V_{GS} is negative
I_{D} and V_{GS} are positive but V_{DS} is negative
V_{DS} and V_{GS} are positive but I_{D} is negative
I_{D}, V_{DS} and V_{GS} are all positive
⇒ In figure, thyristor Th is in off state. When thyristor is turned on, the peak thyristor current can
0.208333333333333
0.416666666666667
15 A
20 A
⇒ Which of the following pulse modulation is analog?
PCM
Differential PCM
PWM
Delta
⇒ For measuring mutual inductance we can use
Anderson bridge
Maxwell's bridge
Heaviside bridge
Either (a) or (b)
⇒ In the figure shows the circuits symbo
FET
PMOSFET
CMOSFET
NMOSFET
⇒ In a 3 phase fully controlled converter the firing frequency is
3 times the line frequency
6 times the line frequency
9 times the line frequency
12 times the line frequency
⇒
A-1, B-4, C-2, D-3
A-3, B-4, C-2, D-1
A-1, B-2, C-4, D-3
A-3, B-2, C-4, D-1
⇒ As compared to full wave rectifier, a half wave rectifier
has higher ripple factor
has lower ripple factor
may have higher or lower ripple factor
has same ripple factor
⇒
Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
⇒ A data signal having frequency components from dc to 50 Hz is to be sent through pulse code modulation using an 8 digit code. The minimum carrier channel bandwidth is
1 kHz
2 kHz
4 kHz
8 kHz
⇒ A lossless transmission line is connected to two identical voltage source as shown in figu
∞
100
50
25
⇒ In a minimum function
the degree of numerator is higher than that of denominator
the degree of numerator is lower than that of denominator
the degree of numerator and denominator are equal
the denominator is a constant
⇒ In CE amplifier the base current is very high.
TRUE
FALSE
⇒ Using the same flip flops
a synchronous flip flop can operate at higher frequency than ripple counter
a ripple counter can operate at higher frequency than synchronous counter
both ripple and synchronous counter can operate at the same frequency
can not determine
⇒ CW Doppler radar is capable of giving accurate measurements of relative velocities.
TRUE
FALSE
⇒ If each stage has a gain of 10 dB and noise figure of 10 dB, then the overall noise figure of a two stage cascade amplifier will be
10
1.09
1
10.9
⇒ For representing two sinusoidal voltages on a phasor diagram
Both voltages must be of the same frequency
Both voltages must be sinusoidal but may be of different frequencies
One of the voltages must be of 50 Hz
The frequency of one must be integral of that of other
⇒ The following switching functions are to be implemented using a decoder
2 to 4 line
3 to 8 line
4 to 16 line
5 to 32 line
⇒ Input and output impedance with feedback for voltage series feedback having A = -200, R_{1} = 10 kΩ, R_{0} = 50 kΩ and feedback factor β = -0.2 will be
410 kΩ, 2050 kΩ
410 kΩ, 1.219 kΩ
≈ 0.243 kΩ, 2050 kΩ
≈ 0.24 kΩ, 1.219 kΩ
⇒ The signal m(t) = 10 cos 100 pt is sampled at the rate of F_{s} = 75 H_{z, } then determine signal after sampling.
4 cos 100 pt + 8 sin 200 pt
4 cos 100 pt + 8 sin 200 pt + cos 75 pt
4 cos 25 pt + 8 sin 50 pt + cos 75 pt
none
⇒ A digital voltmeter has a 4 1/2 digit display. The 1 V range can measure voltage up to
0.9999 V
1.9999 V
0.199 V
9.999 V
⇒ In binary data transmission DPSK is preferred to PSK because
a coherent carrier is not required to the generated at the receiver
for a given energy per bit, the probability for zero is less
the 180° phase shifts of the carrier
more protection is provided against impulse noise
⇒ While selecting a memory chip the feature which should be examined is
capacity
ac characteristics
dc characteristics
all of the above
⇒ Fourier series is applicable for
periodic
finite duration
non periodic
a and b
⇒ Most of the amplification of the received signal is obtained in a superheterodyne receiver from the
IF stage
RF stage
power amplification stage
none of the above
⇒ Which of the following has highest resistivity?
Mica
Paraffin wax
Air
Mineral oil
⇒ Broadcasting antennas are generally
omnidirectional type
vertical type
horizontal type
helical
⇒ If word length is 16 bits the decimal equivalent of largest number which can be stored is
32767
32766
16383
16384
⇒ Acoustic strain gauges
have good linearity of measurement
do not have long term stability
have a large range of measurement
have an accuracy range of 0.1-1% depending on environment
⇒
Match the following:
List I | List II | ||
---|---|---|---|
A. | Coastals receiver | 1. | VSB |
B. | Stereo-multiplexing | 2. | Demodulating DSB-SC |
C. | TV broad casting | 3. | FM radio broad casting |
4. | Slope overload | ||
5. | Matched filter |
A-1, B-3, C-2
A-2, B-3, C-1
A-2, B-1, C-4
A-4, B-3, C-1
⇒ In n channel JFET
I_{D} and V_{DS} are positive but V_{GS} is negative
I_{D} and V_{GS} are positive but V_{DS} is negative
V_{DS} and V_{GS} are positive but I_{D} is negative
I_{D}, V_{DS} and V_{GS} are all positive
⇒ In figure, thyristor Th is in off state. When thyristor is turned on, the peak thyristor current can
0.208333333333333
0.416666666666667
15 A
20 A
⇒ Which of the following pulse modulation is analog?
PCM
Differential PCM
PWM
Delta
⇒ For measuring mutual inductance we can use
Anderson bridge
Maxwell's bridge
Heaviside bridge
Either (a) or (b)
⇒ In the figure shows the circuits symbo
FET
PMOSFET
CMOSFET
NMOSFET
⇒ In a 3 phase fully controlled converter the firing frequency is
3 times the line frequency
6 times the line frequency
9 times the line frequency
12 times the line frequency
⇒
Match the following:
List I (Types of memory) | List II (Used As) | ||
---|---|---|---|
A. | DRAM | 1. | Cache memory |
B. | SRAM | 2. | Main memory |
C. | Parallel Access Registers | 3. | BIOS memory |
D. | ROM | 4. | CPU registers |
A-1, B-4, C-2, D-3
A-3, B-4, C-2, D-1
A-1, B-2, C-4, D-3
A-3, B-2, C-4, D-1
⇒ As compared to full wave rectifier, a half wave rectifier
has higher ripple factor
has lower ripple factor
may have higher or lower ripple factor
has same ripple factor
⇒
Assertion (A): A Darlington amplifier has very low output impedance
Reason (R): The circuit has a low resistance R_{E} between emitter and ground
Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
⇒ A data signal having frequency components from dc to 50 Hz is to be sent through pulse code modulation using an 8 digit code. The minimum carrier channel bandwidth is
1 kHz
2 kHz
4 kHz
8 kHz
⇒ A lossless transmission line is connected to two identical voltage source as shown in figu
∞
100
50
25
⇒ In a minimum function
the degree of numerator is higher than that of denominator
the degree of numerator is lower than that of denominator
the degree of numerator and denominator are equal
the denominator is a constant
⇒ In CE amplifier the base current is very high.
TRUE
FALSE
⇒ Using the same flip flops
a synchronous flip flop can operate at higher frequency than ripple counter
a ripple counter can operate at higher frequency than synchronous counter
both ripple and synchronous counter can operate at the same frequency
can not determine
⇒ CW Doppler radar is capable of giving accurate measurements of relative velocities.
TRUE
FALSE
⇒ If each stage has a gain of 10 dB and noise figure of 10 dB, then the overall noise figure of a two stage cascade amplifier will be
10
1.09
1
10.9
⇒ For representing two sinusoidal voltages on a phasor diagram
Both voltages must be of the same frequency
Both voltages must be sinusoidal but may be of different frequencies
One of the voltages must be of 50 Hz
The frequency of one must be integral of that of other
⇒ The following switching functions are to be implemented using a decoder
- f_{1} = ∑m (1, 2, 4, 8, 10, 14)
- f_{2} = ∑m (2, 5, 9, 15)
- f_{3} = ∑m (2, 4, 5, 6, 7)
2 to 4 line
3 to 8 line
4 to 16 line
5 to 32 line
⇒ Input and output impedance with feedback for voltage series feedback having A = -200, R_{1} = 10 kΩ, R_{0} = 50 kΩ and feedback factor β = -0.2 will be
410 kΩ, 2050 kΩ
410 kΩ, 1.219 kΩ
≈ 0.243 kΩ, 2050 kΩ
≈ 0.24 kΩ, 1.219 kΩ