Question is ⇒ A pre-emphasis circuit provides extra noise immunity by, Options are ⇒ (A) converting the phase modulation to frequency modulation, (B) pre-amplifying the whole audio band, (C) boosting the base frequencies, (D) amplifying the higher audio frequencies, (E) , Leave your comments or Download question paper.

Question is ⇒ A pre-emphasis circuit provides extra noise immunity by, Options are ⇒ (A) converting the phase modulation to frequency modulation, (B) pre-amplifying the whole audio band, (C) boosting the base frequencies, (D) amplifying the higher audio frequencies, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	A pre-emphasis circuit provides extra noise immunity by
A.	converting the phase modulation to frequency modulation [Wrong Answer]
B.	pre-amplifying the whole audio band [Wrong Answer]
C.	boosting the base frequencies [Wrong Answer]
D.	amplifying the higher audio frequencies [Correct Answer]
View Answer 1 -1 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Consider the following program for 8085 Adds decimal number 5 to contents of memory
Subtracts decimal number 5 from contents of memory
Subtracts decimal number 15 from contents of memory
Adds decimal number 15 to contents of memory

⇒

Assertion (A): TWT uses a focussing mechanism to prevent the electron beam from spreading.

Reason (R): In a TWT the electron beam has to travel a much longer distance than in klystron.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct

⇒

Assertion (A): At a temperature of 1000 K, thermionic emission current is about 0.1 A/cm² of surface.

Reason (R): Thermionic emission current is given by I_th = SA₀ T² e^-Ew/kT.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true

⇒ Accurate amplitude measurements can be made more easily than accurate phase shift measurements.
TRUE
FALSE

⇒

Assertion (A): BCD code is used in pocket calculators

Reason (R): BCD code is slower than binary.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true

⇒ TTL inverter has
one input
two inputs
one or two inputs
three inputs

⇒ A three stage telephone switching structure is to have 128 input and 128 output terminals. It has been found that at peak time the utilization probability is 0.1. The number of intermediate links required for non-blocking configuration is 15. If the actual number of intermediate links is 5, the probability of blocking of call is
0.01
0.005
0.002
0.001

⇒ The equivalent form of the logical expression (ABC + ABC + ABC + ABC + ABC) is:
C + (A ⊕ B)
(A + B + C)(A + B + C)
(A + B + C)(A + B + C)(A + B + C)
(A + B + C)(A + B + C)(A + B + C)

⇒ Logic analyser is
a multichannel oscilloscope
similar to logic pulser
similar to current tracer
none of the above

⇒ A direct radiating cone type loudspeaker attenuates :
medium range frequencies
very low frequencies
high frequencies
very low and high frequencies

⇒ There is no radiation at right angles to the plane of the array, is end fire array.
TRUE
FALSE

⇒ In position control system the device used for providing rate feedback voltage is
potentiometer
synchro-transmitter
synchro-transformer
tacho generator

⇒ A 16 x 8 ROM stores these words in its first four locations, as given below. Which of this represents 3 CH in hexadecimal?
R₀ = 1110 0010
R₁ = 0101 0111
R₂ = 0011 1100
R₃ = 1011 1111

⇒ The amplitude of a random signal uniformly distributed between - 5 V and 5 V. If the positive values of the signal are uniformly quantized with a step size of 0.05 V, and the negative values are uniformly quantized with a step size of 0.10 V, the resulting signal to quantization noise is approximately
46 dB
43.8 dB
42 dB
40 dB

⇒ Electric lines of force do not cross each other because
the lines of force mutually repel each other
the lines of force emanate from a point charge
the tangent to the line of force gives the direction of E and if they cross two tangents for E which is not possible
none of the above

⇒ Which of the following is not necessarily the advantages of a push pull amplifier?
It gives more output
It removes odd a well as even harmonics
There is no effect of ripple of the power supply
It consumes least power

⇒ An 8-bit microprocessor has 16 bit address bus A₀ - A₁₅. The processor addresses a 1-K byte memory chip as shown. The address range for the chi
(F00F)_H TO (F40E)_H
(F000)_H TO (F3FF)_H
(F100)_H TO (F4FF)_H
(F700)_H TO (FAFF)_H

⇒ Which control action can never be used alone?
Proportional
Derivative
Integral
Both (b) and (c)

⇒ Unit doublet is the Laplace inverse of __________ .
1/s
s²
s
none of these

⇒ Equal amplitude ac signals are given as inputs to both inverting and given as inputs to both inverting and non-inverting terminals of an op-amp. The output will be zero when the phase difference between inputs is
0°
90°
180°
270°

⇒ In the given figure f(t) is an even funct
TRUE
FALSE

⇒ Mark the false statement:
since wave-shape of a digital signal is unimportant, linear amplifiers are not required
the precise amplitude of a digital signal is also unimportant provided two voltage levels (0 and 1) are quite different
the leading and trailing edges of a digital signal need not be sharp
actual digital waves have rise and fall times of the order of a few nano seconds

⇒ IC counters are
synchronous only
asynchronous only
both synchronous and asynchronous
none of the above

⇒ A parallel plate capacitor having C = 200 x 10^-12 F has loss dielectric having tan δ = 4 x 10^-4. At an ac voltage of f = 10⁶ Hz and peak value 2 V, the dielectric losses are
10^-8 W
10^-6 W
10^-4 W
10^-2 W

⇒ Which of the following transformers has low primary current?
Current transformer
Potential transformer
Distribution transformer
Both (a) and (b)

⇒ What happens when forward bias is applied to a junction diode?
Majority carrier current is reduced to zero
Minority carrier current is reduced to zero
Potential barrier is increased
Potential barrier is decreased

⇒ Given two numbers A and B in sign magnitude representation in an eight bit format A = 00011110 and B = 10011100 then A ⊕ B gives
10000010
11111
10011101
11100001

⇒ In a N-P-N transistor, when emitter junction is forward biased and collector junction is reverse biased the transistor will operate in
active region
saturation region
cut-off region
inverted region

⇒ Which mode is called dominant mode in rectangular wave guide?
TE₀₁
TE₁₁
TE₁₀
TE₂₀

⇒ An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. Which of the following will increases from this type of operation?
Stability
Bandwidth
Distortion
Input resistance