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The message carrying efficiency is best in  
A.  AM [Wrong Answer] 
B.  FM [Wrong Answer] 
C.  AMSC [Correct Answer] 
D.  Phase modulation [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 :
⇒ In a TV receiver the video IF amplifier provides a gain of about
5 dB
20 dB
60 dB
200 dB
⇒ Which of the following measurements can be done using a counter?
1 and 2
2 and 3
1 and 4
2 and 4
⇒ In Java which operator can be used even if there is a single operand
+

*
%
⇒ Semi conducting materials are all
elements
compounds
elements or compounds
elements or mixtures
⇒ A pn junction diode has
low forward and high reverse resistance
a nonlinear vi characteristics
zero forward current till the forward voltage reaches cut in value
all of the above
⇒ The first row of the window is called ' Title bar '.
TRUE
FALSE
⇒ How many roots with positive real parts do the equation s^{3} + s^{2}  s + 1 = 0 have?
Zero
One
Two
Three
⇒ An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if
A = 1, B = 1, S = 1
A = 1, B = 1, S = 0
A = 1, B = 0, S = 1
A = 1, B = 0, S = 0
⇒ Binary multiplication 1 x 0 =
1
0
10
11
⇒ In a purely inductive circuit, the current __________ the voltage by __________ .
lags, 0°
leads, 90°
lags, 90°
lags, 45°
⇒ For the floating point numbers 1.81 x 10^{29} and 0.0152 x 10^{18} the normalised forms are
0.181 x 10^{28} and 0.152 x 10^{17 }respectively
18.1 x 10^{30} and 0.152 x 10^{17} respectively
0.181 x 10^{28} and 1.52 x 10^{16} respectively
None of the above
⇒ A resistance R, inductance L and capacitance C are in series. The source frequency is adjusted to be equal to resonant frequency. The lower half power frequency is ω_{1}. Another resistance R is added in series with the circuit. The new lower half power frequency will be
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less than ω_{1}
more than ω_{1}
either more than ω_{1} or less then ω_{1}
⇒ Which of the following are universal gates?
1 and 2 only
1 and 3 only
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⇒ For a series resonant circuit at low frequency circuit impedance is __________ and at high frequency circuit impedance is _______
capacitive, inductive
inductive, capacitive
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⇒ In integral cycle control of ac regulator, the input power factor is equal to
duty cycle a
a^{2}
a
(a)^{1/3}
⇒ Piezoelectric materials serves as a source of
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ultrasonic waves
musical waves
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⇒ The gain of an FET amplifier can be changed by changing
r_{m}
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⇒ McMurray Bedford full bridge inverter uses
natural commutation
auxiliary commutation
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⇒ The number of registers and flags in 8086 are
13 and 5 respectively
9 and 5 respectively
13 and 9 respectively
9 and 9 respectively
⇒ Which one of the following is a cut set of the graph in the given fig
1, 2, 3, and 4
2, 3, 4, and 6
1, 4, 5, and 6
1, 3, 4, and 5
⇒ In an integral controller
the output is proportional to input
the rate of change of output is proportional to input
the output is proportional to rate of change of input
none of the above
⇒ 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 signaltonoise ratio is
100
50
10
5
⇒ In the given figure power meters at A and B indicate 1 mW and 110 μW respectively. VSWR of lin
1.5
2
2.5
3
⇒ The output of a linear system for any input can be computed in which of the following ways?
Only by summation of inpulse response by convolution integral
Only by summation of step response by superposition integral
Neither a nor b
Either (a) or (b)
⇒ Consider the following statements: The function of oxide layer in an IC device is to
1, 2, 3 are correct
1, 3, 4 are correct
2, 3, 4 are correct
1, 2, 4 are correct
⇒ Which mode has the minimum cutoff frequency in rectangular wave guides?
TE_{11}
TE_{10}
TE_{01}
TE_{20}
⇒ For static electric and magnetic fields in an homogenous sourcefree medium, which of the following represents the correct form of Maxwell's equations?
Δ.E = 0
Δ.E = 0
Δ x E = 0
Δ x E = 0
⇒ In tape recorders the hissing noise is due to irregularities in magnetic coating on tape.
TRUE
FALSE
⇒ In an FM system, when the AF is 500 Hz and the AF voltage is 2.4 V, the deviation is 4.8 kHz. If the AF voltage is now increased to 7.2 V, the new deviation will be
4.8 kHz
9.6 kHz
14.4 kHz
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⇒ The number of protons in a copper atom are
2
9
11
29
⇒ In a TV receiver the video IF amplifier provides a gain of about
5 dB
20 dB
60 dB
200 dB
⇒ Which of the following measurements can be done using a counter?
 Pulse duration
 Interval between two pulses
 Amplitude of the pulse
 Rise time of a pulse
1 and 2
2 and 3
1 and 4
2 and 4
⇒ In Java which operator can be used even if there is a single operand
+

*
%
⇒ Semi conducting materials are all
elements
compounds
elements or compounds
elements or mixtures
⇒ A pn junction diode has
low forward and high reverse resistance
a nonlinear vi characteristics
zero forward current till the forward voltage reaches cut in value
all of the above
⇒ The first row of the window is called ' Title bar '.
TRUE
FALSE
⇒ How many roots with positive real parts do the equation s^{3} + s^{2}  s + 1 = 0 have?
Zero
One
Two
Three
⇒ An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if
A = 1, B = 1, S = 1
A = 1, B = 1, S = 0
A = 1, B = 0, S = 1
A = 1, B = 0, S = 0
⇒ Binary multiplication 1 x 0 =
1
0
10
11
⇒ In a purely inductive circuit, the current __________ the voltage by __________ .
lags, 0°
leads, 90°
lags, 90°
lags, 45°
⇒ For the floating point numbers 1.81 x 10^{29} and 0.0152 x 10^{18} the normalised forms are
0.181 x 10^{28} and 0.152 x 10^{17 }respectively
18.1 x 10^{30} and 0.152 x 10^{17} respectively
0.181 x 10^{28} and 1.52 x 10^{16} respectively
None of the above
⇒ A resistance R, inductance L and capacitance C are in series. The source frequency is adjusted to be equal to resonant frequency. The lower half power frequency is ω_{1}. Another resistance R is added in series with the circuit. The new lower half power frequency will be
ω_{1}
less than ω_{1}
more than ω_{1}
either more than ω_{1} or less then ω_{1}
⇒ Which of the following are universal gates?
 NAND
 NOR
 XOR
1 and 2 only
1 and 3 only
2 and 3 only
1, 2 and 3
⇒ For a series resonant circuit at low frequency circuit impedance is __________ and at high frequency circuit impedance is _______
capacitive, inductive
inductive, capacitive
resistive, inductive
capacitive, resistive
⇒ In integral cycle control of ac regulator, the input power factor is equal to
duty cycle a
a^{2}
a
(a)^{1/3}
⇒ Piezoelectric materials serves as a source of
microwaves
ultrasonic waves
musical waves
resonant waves
⇒ The gain of an FET amplifier can be changed by changing
r_{m}
g_{m}
R_{d}
none of the above
⇒ McMurray Bedford full bridge inverter uses
natural commutation
auxiliary commutation
complementary commutation
any of the above
⇒ The number of registers and flags in 8086 are
13 and 5 respectively
9 and 5 respectively
13 and 9 respectively
9 and 9 respectively
⇒ Which one of the following is a cut set of the graph in the given fig
1, 2, 3, and 4
2, 3, 4, and 6
1, 4, 5, and 6
1, 3, 4, and 5
⇒ In an integral controller
the output is proportional to input
the rate of change of output is proportional to input
the output is proportional to rate of change of input
none of the above
⇒ 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 signaltonoise ratio is
100
50
10
5
⇒ In the given figure power meters at A and B indicate 1 mW and 110 μW respectively. VSWR of lin
1.5
2
2.5
3
⇒ The output of a linear system for any input can be computed in which of the following ways?
Only by summation of inpulse response by convolution integral
Only by summation of step response by superposition integral
Neither a nor b
Either (a) or (b)
⇒ Consider the following statements: The function of oxide layer in an IC device is to
 mask against diffusion or non implant
 insulate the surface electrically
 increase the melting point of silicon
 produce a chemically stable protective layer
1, 2, 3 are correct
1, 3, 4 are correct
2, 3, 4 are correct
1, 2, 4 are correct
⇒ Which mode has the minimum cutoff frequency in rectangular wave guides?
TE_{11}
TE_{10}
TE_{01}
TE_{20}
⇒ For static electric and magnetic fields in an homogenous sourcefree medium, which of the following represents the correct form of Maxwell's equations?
Δ.E = 0
Δ.E = 0
Δ x E = 0
Δ x E = 0
⇒ In tape recorders the hissing noise is due to irregularities in magnetic coating on tape.
TRUE
FALSE
⇒ In an FM system, when the AF is 500 Hz and the AF voltage is 2.4 V, the deviation is 4.8 kHz. If the AF voltage is now increased to 7.2 V, the new deviation will be
4.8 kHz
9.6 kHz
14.4 kHz
28.8 kHz
⇒ The number of protons in a copper atom are
2
9
11
29