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Q1. | In the context of error detection in satellite transmission, ARQ stands for |

A. | Automatic Repeat Request [Correct Answer] |

B. | Automatic Relay Request [Wrong Answer] |

C. | Accelerated Recovery Request [Wrong Answer] |

D. | Automatic Radiation Quenching [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ The beam of a radar should be

very narrow

very wide

neither too narrow nor very wide

either (

*b*) or (

*c*)

⇒ If P = 250 W and p.f. = 0.707 lagging, Q =

250 vars

- 250 vars

176.7 vars

- 176.75 vars

⇒ The figure of merit for a logic family is

gain band width product

(propagation delay time) (power dissipation)

(fan out) (power dissipation)

(noise margin) (power dissipation)

⇒ A JFET behaves as a constant current source when

V

_{GS}= 0

V

_{GS}is less than pinch off voltage

V

_{GS}= V

_{DS}

V

_{GS}is more than pinch off voltage

⇒ Impedance inversion may be obtained with

a short circuited stub

a quarter wave line

an open circuited stub

a half wave line

⇒ 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

⇒ In a square law modulator, the carrier frequency should be __________ times than the highest modulating frequency.

1

2

4

3

⇒ Since noise phase modulated FM wave, as the noise sideband frequency approaches the carrier frequency, the noise amplitude

is equalized

is increased

is decreased

remains constant

⇒ The slope of log-magnitude asymptote changes by - 40 dB/ decade at a frequency ω

_{1}. This means that

a double pole is present

a pair of complex conjugate poles is present

either a double pole or a pair of complex conjugate poles is present

a pole or zero at origin is present

⇒ A microprocessor uses 3 MHz oscillator. The duration of one T state is

1 μ

*s*

0.666 μ

*s*

0.333 μ

*s*

3 μ

*s*

⇒ Paper capacitors are used in power supplies for filtering.

TRUE

FALSE

⇒ In the series circuit shown in figure, for series resonance, the value of the coupling coefficient, K wil

0.25

0.5

0.1

1

⇒ When a potential is applied across an intrinsic semiconductor, holes flow

towards positive terminal

away from positive terminal

in the external circuit only

none of the above

⇒ Two coils having equal resistance but different inductances are connected in series. The time constant of the series combination is

average of the time constants of individual coils

sum of the time constants of the individual coils

geometric mean of the time constants of individual coils

product of the time constants of the individual coils

⇒ If B

_{max}is the maximum flux density, eddy current loss is proportional to

B

_{max}

B

^{1.6}

_{max}

B

^{2}

_{max}

B

^{3}

_{max}

⇒ As compared to 17.34° antenna, the total increase in the signal relayed by 4.5° antenna of INTELSAT-IV is

14.85

220

78

3.85

⇒ In the wheatstone bridge in figure, each resistance is increased by 0.05%. The value of v

_{0}will

50 mV

5 mV

0.1 mV

zero

⇒ Equation

*x*

_{l0}= 11001001

_{2}when solved for

*x*gives the value of

*x*as

8

111

152

201

⇒ In an air cored coil, a current of 0.7 A causes a flux of 5 x 10

^{-6}Wb. If the core is made of cast iron and the coil is similar, the same current can set up a flux of about

5 x 10

^{-6}Wb

5 x 10

^{-8}Wb

10

^{-2}Wb

5 x 10

^{-4}Wb

⇒ In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will

be reduced by half

be doubled

be four times as high

be reduced to one fourth

⇒ The external magnetic field in a magnetron is such that lines are

parallel to the axis of cathode

perpendicular to the axis of cathode

inclined to the axis of cathode

either (b) or (c)

⇒ Which one of the following theorem can be conveniently used to calculate the power consumed by the 10 Ω resistor in the network shown in the above fig

Thevenin's theorem

Maximum power transfer theorem

Millman's theorem

Superposition theorem

⇒ Which of these is also called 'hot carrier diode'?

PIN diode

LED

Photo diode

Schottky diode

⇒ The dual of the function A(BC + BC + BC) is

A + (B + C) (B + C) (B + C)

A (BC + BC + BC)

C(BA + CA + CA)

ABC + ABC + ABC

⇒ Tracking of extra terrestrial objects requires

high transmitting power

very sensitive receiver

fully steerable antenna

all of the above

⇒ In a megger the moving coil meter has a permanent magnet.

TRUE

FALSE

⇒ If

*e*= 10 sin(10

^{8}

*t*+ 3 sin 10

^{4}

*t*) then the modulation index is

1

2

3

4

⇒ A 4 bit counter with four flip-flops will count upto decimal

8

15

31

63

⇒ It is required to increase the maximum range of a radar by a factor of two. The peak power transmitted in the radar system has to be increased by a factor of

2

4

8

16

⇒ A constant

*k*low pass filter has

*f*

_{c}= 500 Hz. At

*f*= 1000 Hz, the attenuation is

zero

infinity

may be zero or infinity

more than zero but less than infinity