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Q1. | For demodulating PCM; it is first converted into |

A. | PDM [Wrong Answer] |

B. | PPM [Wrong Answer] |

C. | PWM [Wrong Answer] |

D. | PAM [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ In a linear op-amp circuit

the product of gain and bandwidth is constant

input can be dc only

input can be ac only

saturation may occur

⇒ Find the Fourier transform of the half cosine pulse as shown bel

0.5 {sin

*c*[0.25(

*f*- 1)] + sin

*c*[2.5(

*f*+ 1)]}

0.5 {sin

*c*[0.5(

*f*- 1)] + sin

*c*[0.5(

*f*+ 1)]}

0.25 {sin

*c*[0.25(

*f*- 1)] + sin

*c*[0.25 (

*f*- 1)]}

0.25 {sin

*c*[0.5(

*f*- 1)] + sin

*c*[0.5(

*f*- 1)]}

⇒ When negative feedback is used the fractional changes in closed loop gain are desensitized by the factor (1 + A

_{v}β)

TRUE

FALSE

⇒ Figure shows the equivalent circuit of resistor. The resistor is non-inductive w

R = L/C

LR = L/C

L = CR

^{2}

C = LR

^{2}

⇒ The chip 8254 is a 40 pin programmable interval timer. The number of its independent 16 bit counters is

2

3

4

5

⇒ When a

*p*-

*n*Junction is forward biased

the current flow is due to electrons only

the majority carriers in both

*p*and

*n*materials are driven toward the junction.

the majority carriers in both

*p*and

*n*materials are away from the junction.

both (a) and (c).

⇒ Which element exhibits the property of inertia?

Resistance

Capacitance

Inductance

Both resistance and inductance

⇒ The capacitors C

_{1}, C

_{3}, C

_{4}and C

_{5}have a capacitance of 4 μF each and the capacitor C

_{2}has a capacitance of 10 μF. The effective capacitance (in μF) between the points X and Y will

4 μF

6 μF

3 μF

8 μF

⇒ Consider the instructions

- MOV M, B
- OUT 4
- LDAX

Which of the above require memory write cycle?1, 2, 3

1 and 2 only

1 and 3 only

2 and 3 only

⇒ The signal to noise ratio in telemetry should be better than

5 db

10 db

25 db

60 db

⇒ Watthour meter is an integrating instrument

TRUE

FALSE

⇒ In a synchronous counter all flip flops are clocked together.

TRUE

FALSE

⇒ Two voltages are -5 V and -10 V. In positive logic

-5 V is 1 and -10 V is 0

-10 V is 1 and -5 V is 0

-5 V is 1 in some circuits and 0 in others

-10 V is 1 in some circuits and 0 in others

⇒ Which is not a valid dimension statement?

DIMENSION KAT(10, 20)

DIMENSION BAT (30, 20)

DIMENSION KAT(K, 10)

DIMENSION BAT (10, 5)

⇒ In rectangular waveguides the ratio of width to height is about

0.5

1

2

4

⇒ A wire is carrying current

*I*. The field intensity H at a distance

*r*from the wire

is directed towards wire

is directed away from wire

is tangential every where to a circle of radius

*r*

none of the above

⇒ Depth of penetration does not depend on frequency.

TRUE

FALSE

⇒ In 2's complement addition, the carry generated in the last stage is

added to LSB

neglected

added to bit next to MSB

added to the bit next to LSB

⇒ In a CE amplifier the Q point is very close to saturation point on the dc load line. This results in

positive clipping of collector current

negative clipping of collector current

both positive and negative clipping of collector current

either positive or negative clipping of collector current

⇒ In a CE bipolar transistor operating in active region, collector current is independent of

V

_{CE}

I

_{B}

both V

_{CE}and I

_{B}

none of the above

⇒ How many roots with positive real parts do the equation

*s*

^{3}+

*s*

^{2}-

*s*+ 1 = 0 have?

Zero

One

Two

Three

⇒ The useful magnetic flux obtainable from any closed surface is

unity

constant

both (a) and (b)

none of the above

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | shift Register | 1. | Frequency division |

B. | Counter | 2. | Addressing in memory chips |

C. | Decoder | 3. | Serial to parallel Data conversion |

A-3, B-2, C-1

A-3, B-1, C-2

A-2, B-1, C-3

A-1, B-2, C-2

⇒ Heating effect of current is used in

ammeters

voltmeters

both ammeters and voltmeters

wattmeters

⇒ Poynting vector is the rate of energy flow having

W/m

^{2}

W-m

kWh/s

W/m

⇒ The charge of an electron is

1.6 x 10

^{-17}coulomb

1.6 x 10

^{-19 }coulomb

1.6 x 10

^{-21}coulomb

1.6 x 10

^{-23}coulomb

⇒ For matching over a range of frequencies in a transmission line it is best to use

a balun

a broad band directional coupler

double stub

a single stub of adjustable position

⇒ Directivity gain depends on

the distribution of radiated power in space

solid angle of the radiated field pattern

both (a) and (b)

none of the above

⇒ If

*t*is the pulse width, Δ

_{p}*is the propagation delay,*

_{t}*T*is period of pulse train then the following condition can avoid the race around condition

*t*= Δ

_{p}*t*= T

2

*t*> Δ

_{p}*t*> T

*t*< Δ

_{p}*t*< T

*t*< Δ

_{p}*t*< T

⇒ An electron rises through a voltage of 100 V. The energy acquired by it will be

100 eV

100 joules

(100)

^{1.2}eV

(100)

^{1.2}joules