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Q1. | Which statement out of the following statement is wrong? |

A. | Attenuation of satellite signals by rain and fog varies almost inversely with the angle of elevation [Wrong Answer] |

B. | At 12/4, GHz link frequencies, signal power loss due to rain and fog is much greater than at 4/6 GHz frequencies [Wrong Answer] |

C. | The distance between satellite and Earth station varies slightly with angle of elevation [Wrong Answer] |

D. | At present 4/6 GHz geostationary satellites are being parked in geosynchronous, orbits at least 10° apart [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 :**

⇒ If the intermediate frequency of a superheterodyne receiver falls within the tuning range of the receiver

Unsuitability will occur

Heterodyne whistles will be heard

Tuning to the frequency band immediately adjacent to the intermediate frequency will become impossible

All of the above

⇒ A 400 W carrier is amplitude modulated with

*m*= 0.75. The total power in AM is

400 W

512 W

588 W

650 W

⇒ For a junction FET in the pinch off region, as the drain voltage is increased, the drain current

becomes zero

abruptly decrease

abruptly increases

remains constant

⇒ A current of 3.18 A is flowing through resistance of 35.68 Ω. The voltage drop across resistance to the appropriate number of significant figures is

113.4624 V

113.462 V

113.46 V

113 V

⇒ Read the following statements about files in Pascal

- A file can grow or shrink dynamically.
- A file which consists of only characters is called text file.
- Text files may be read and written using standard Pascal READ and WRITE procedures.
- Every file must have a beginning but may or may not have an end.

All

1, 2, 3 only

2, 3, 4 only

1, 2 and 4 only

⇒ In rectifiers the use of RC filters is recommended when

load current is high

load current is small

load current is neither high nor small

either (a) or (c)

⇒ For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot)

is -90°

is +90°

depends on the damping factor

none of the above

⇒ When a

*p*-

*n*junction is forward biased, the current remains zero till the applied voltage overcomes the barrier potential.

TRUE

FALSE

⇒ A receiver having an RF amplifier and an IF of 450 kHz, has Q of the coils 65 and an incoming frequency of 1200 kHz. The image rejection of the receiver is

5870

3655

236

13.3

⇒ The property is not valid for basic singularity function is

it is even signal

convolution of any arbitary function

*x*(

*t*) and an impulse is the original function itself

the sum of two impulses at same location is the impulse with the strength equal to the summation of individual strengths.

none of these.

⇒ In the state equation

*x*= AX + B

*u*is a

*n*x

*m*matrix.

TRUE

FALSE

⇒ If F(

*j*ω) is the Fourier transform of

*f*(

*t*), then

£

*f*(-

*t*) = F(

*j*ω)

£

*f*(-

*t*) = F* (

*j*ω)

£

*f*(-

*t*) = F(-

*j*ω)

£

*f*(-

*t*) = F* (

*- j*ω)

⇒ 1274

_{16}- 3A7

_{16}= __________ .

ACA

_{16}

ACB

_{16}

ECD

_{16}

AAA

_{16}

⇒ The conductivity of germanium increases by about 6 percent per degree increase in temperature.

TRUE

FALSE

⇒ 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)

⇒ An instruction used to set cany flag in a computer is classified as

data transfer

arithmetic

logical

program control

⇒ The number of inputs and outputs in a full adder are

2 and 1

2 and 2

3 and 3

3 and 2

⇒ A temperature sensistive transducer is subjected to sudden temperature change. It takes 10 seconds for transducer to reach equilibrium condition (five times time constant). The time taken to reach half of temperature difference will be

1.38

*s*

5

*s*

8.62

*s*

0.9

*s*

⇒ The 2732 is 4096 x 8 EPROM. How many address lines does it have?

12

24

50

100

⇒ Two thyristors of the same rating and specifications

will have equal on state voltage drops

will have equal forward blocking voltage for the same current

will have different on state voltage drops

may have equal or different on state voltage drops and equal or different forward blocking voltage's for the same current

⇒ In a step down chopper using pulse width modulation, T

_{on}= 3 x 10

^{-3}and T

_{off}= 1 x 10

^{-3}s. The chopping frequency is

333.33

250

500

1000

⇒ The phase angle curve of G(

*j*ω) H(

*j*ω) can be drawn

by adding the phase angle curves of individual factors

by subtracting the phase angle curves of individual factors

by multiplying the phase angle curves of individual factors

by dividing the phase angle curves of individual factors

⇒ For a BJT, under the saturation region.

I

_{C}= βI

_{B}

I

_{C}> βI

_{B}

I

_{C}is independent of other parameter

I

_{C}< βI

_{B}

⇒ To measure a resistance by a dc potentiometer

it is necessary to standardise the potentiometer

it is not necessary to standardise the potentiometer

it is necessary to use a volt ratio box

none of the above

⇒ DC tachogenerator can be used in

speed control system

position control system

both (a) and (b)

neither (a) nor (b)

⇒ A cycloconverter uses

natural commutation

forced commutation

either natural or forced commutation

both natural and forced commutation together

⇒ Non-coherently detection is not possible for

PSK

ASK

FSK

both (a) and (c)

⇒ The modulation index is, if

*f*= 500 Hz, Δ

_{m}*f*= 2.25 kHz

2.25

4.5

9

18

⇒ Which of the following input is not possible in case of a SR flip-flop?

S = 0, R = 0

S = 0, R = 1

S = 1, R = 0

S = 1, R = 1

⇒ MS Excel is an application software for financial planning.

TRUE

FALSE