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Q1. | Which of the following statement regarding link loss for a satellite is wrong? |

A. | For fixed antenna, it is inversely proportional to f^{2} [Wrong Answer] |

B. | For fixed frequency, it is inversely proportional to the product of the antenna aperture areas [Wrong Answer] |

C. | For a given satellite operating at a given frequency, it is inversely proportional to [Wrong Answer] |

D. | Loss in down-link is negligible as compared to that in uplink [Correct Answer] |

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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 :**

⇒

Match the following:

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

A. | Reactance theorem | 1. | Foster |

B. | Driving point impedance | 2. | Bartlett |

C. | Continued fraction expansion | 3. | Cauer |

D. | Bisection Theorem | 4. | Positive real function |

A-1, B-4, C-3, D-2

A-1, B-2, C-3, D-4

A-2, B-3, C-1, D-4

A-3, B-4, C-2, D-1

⇒ Consider a 565 PLL with R

_{T}= 10 kΩ and C

_{T}= 0.01 μF. What is the output frequency of the VCO?

10 kHz

5 kHz

2.5 kHz

1.25 kHz

⇒ In the following non planar graph number of independent loop equations

8

12

7

5

⇒ Which of the following circuit has the greatest bandwidth?

*f*

_{r}= 455 MHz; Q = 10

*f*

_{r}= 455 MHz; Q = 100

*f*

_{r}= 1 MHz; Q = 100

*f*

_{r}= 1 MHz; Q = 10

⇒ A magnetic circuit has an iron length of 20 cm and air gap length 0.1 cm. If μ

_{r}= 200 then

mmf for iron and air gap are equal

mmf for iron is much less than that for air gap

mmf for iron is much more than that for air gap

either (a) or (c)

⇒

*V*

_{L}= 100 cos (10

*t*+ 30&d

116.57 sin (10

*t*- 29°) V

116.57 sin (10

*t*+ 29°) V

117.00 sin (10

*t*- 29°) V

117.00 sin (10

*t*+ 29°) V

⇒ The temperature coefficient of a thermistor

is positive

is negative

zero

may be positive or negative depending on its composition

⇒ The pole zero plot of the given figure is

non-minimum phase function

minimum phase function

all pass function

either (b) or (c)

⇒ For class B operation the theoretical maximum efficiency is

1

0.785

0.5

0.275

⇒

**Assertion (A):** If an event A can happen in *m* ways and another event B can happen in *n* ways, both can happen in *mn* ways.

**Reason (R):** Two events are mutually exclusive if happening of either precludes the occurrence of other.

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

⇒ Power monitor and reflectometer use the principle of

directional coupler

klystron amplifier

Gunn diode

TWT

⇒ Kirchoff's voltage law is not valid for a non-linear network

the statement is true

the statement is false

can't say

none of the above

⇒ The power to the base unit of a cordless telephone is supplied by

battery

AC mains

both battery and AC mains

either battery or AC mains

⇒ Instruction cycle is the time required to complete the execution of an instruction.

TRUE

FALSE

⇒ A dc power supply has no load voltage of 30 V and full load voltage of 25 V at full load current of 1 A. The output resistance and voltage regulation respectively are

5 Ω and 25%

25 Ω and 20%

5 Ω and 16.7%

25 Ω and 16.7%

⇒ The dynamic resistance of a forward biased

*p*-

*n*diode

varies inversely with current

varies directly with current

is constant

is either constant or varies directly with current

⇒ Each cell of a static RAM has

4 MOS transistors

4 MOS transistors and 2 capacitors

2 MOS transistors and two capacitors

1 MOS transistor and 1 capacitor

⇒ Eddy current loss is

proportional to frequency

independent of frequency

proportional to (frequency)

^{2}

proportional to (frequency)

^{3}

⇒ Which of the following 8085 instructions do not effect

`CY`

flag?`SEE M`

`SEE R`

`DCRM`

`ADC M`

⇒ Forbidden energy gap in germanium at 0 K is about

10 eV

5 eV

2 eV

0.78 eV

⇒ If average correlation between

*v*

_{1}(

*t*) and

*v*

_{2}(

*t*) is R

_{12}(

*t*) and average correlation between

*v*

_{2}(

*t*) and

*v*

_{1}(

*t*) is R

_{21}(

*t*) then

R

_{12}(t) = R

_{21}(t)

R

_{21}(t) = R

_{12}(t)

R

_{12}(t) = - R

_{21}(t)

none of these

⇒ At

*f*= 7 GHz, a 120 cm dish antenna gives a gain of about

50

500

5000

50000

⇒ The input impedance for folded dipole antenna (two half dipole) is

73

*n*

^{2}

377

*n*

^{2}

73

*n*

377

*n*

⇒ The peak factor is the ratio of

peak and rms values

peak and average values

rms and average values

none of the above

⇒ In a hot wire instrument, the deflection is proportional to

peak value of ac current

average value of ac current

rms value of ac current

either (a) or (b)

⇒ A Schottky diode clamp is used along with a switching BJT for

reducing the power

reducing the switching time dissipation

increasing the value of β

reducing the base current

⇒ Which of the following is true?

The poisson distribution is limiting case of binomial distribution.

In symmetrical distribution, the mean, median and mode coincide.

Regression is the estimation or production of unknown values of one variables from known values of another variable.

All are true.

⇒

Match the following:

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

A. | Digital counter | 1. | Measurement of harmonics |

B. | Schering Bridge | 2. | Measurement of frequency |

C. | Meggar | 3. | Measurement of loss angle of dielectric |

D. | Spectrum analyser | 4. | Measurement of insulation resistance |

A-1, B-2, C-3, D-4

A-4, B-3, C-2, D-1

A-2, B-3, C-4, D-1

A-4, B-1, C-3, D-2

⇒ Resistivity of semiconductors is around 100 Ω-m.

TRUE

FALSE

⇒ A flip flop is a

combinational circuit

memory element

arithmetic element

memory or arithmetic element