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Q1. | For satellite communication, standard Earth stations have antenna diameters in the range of __________ metre. |

A. | 27.5 to 30 [Correct Answer] |

B. | 10 to 15 [Wrong Answer] |

C. | 30 to 50 [Wrong Answer] |

D. | 5 to 10 [Wrong Answer] |

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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 :**

⇒ In a two terminals network the O.C. voltage measured at the given terminals is 100 V and s.c., currents at the same terminals 5 A. If a load of 80 Ω resistance is connected at the terminals, load current is

0.0416666666666667

1.25 A

0.25

6.25 A

⇒ For a second order system, damping ratio ζ is such that 0 < ζ <. Then the roots of characteristic equation are

real but not equal

real and equal

complex conjugate

imaginary

⇒ The

*v*-

*i*characteristic of an element is shown in below figure the elemen

non-linear, active, non-bilateral

linear, active, non-bilateral

non-linear, passive, non-bilateral

non-linear, active, bilateral

⇒ The ripple factor of a full wave rectifier is about 0.5.

TRUE

FALSE

⇒ If (225)

_{Y}= (165)

_{8}find value of Y

7

8

9

11

⇒ Consider the following rules in Fortran

- A signed or unsigned real variable name or a real constant is a real expression.
- Two real expressions connected by an arithmetic operator is a real expression.
- A real variable or constant exponential by an integer constant or integer variable is not valid

All

1 and 2 only

1 and 3 only

2 and 3 only

⇒ Quantization error occurs in

D/A converter

A/D converter

both D/A and A/D converter

neither D/A nor A/D converter

⇒

*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

⇒ A series RC circuit has R = 5 Ω and C = 10 μF. The current in the circuit is 5 sin 20000

*t*. The applied voltage is

252 sin (20000

*t*+ 45°)

252 sin (20000

*t*- 45°)

252 sin 20000

*t*

252 sin (20000

*t*- 90°)

⇒ The word 'LORAN' means

long range navigation

long range TV transmission

long range cable transmission

either (b) or (c)

⇒ If

*e*= 10 sin(10

^{8}

*t*+ 3 sin 10

^{4}

*t*) then the modulation index is

1

2

3

4

⇒ The relation between the apparent power, actual power and reactive power is given by

Apparent power = actual power + reactive power

Apparent power = actual power - reactive power

Apparent power = (actual power)

^{2}- (reactive power)

^{2}

Apparent power = (actual power)

^{2}+ (reactive power)

^{2}

⇒ Huffman code is also known as redundancy code

TRUE

FALSE

in some cases

depend upon efficiency

⇒ For the DAC in the given figure V

_{O10 V5 V4 V8 V}

⇒ In AM, the modulation envelope has a peak value double the unmodulated carrier level, when the modulation is

0.25

0.33

0.5

1

⇒ An antenna is considered to be in free space where its height above the ground is

λ

2λ

less than 3λ

more than 5λ

⇒ A circuit has two branches 1 and 2 in parallel. If |Q

_{1}| = 8 KVAR and |Q

_{2}| = 6 KVAR, the magnitude of total kvar drawn form supply will be

14 KVAR

2 KVAR

zero

14 or 2 KVAR

⇒ Which of the following term applies to troposcatter propagation?

SIDs

Faraday rotation

Atmospheric storms

Fading

⇒ For a MOD-12 counter, the FF has a

*t*= 60 ns The NAND gate has a

_{pd}*t*of 25 n sec. The clock frequency is

_{pd}3.774 MHz

> 3.774 MHz

< 3.774 MHz

4.167 MHz

⇒ Schottky clamping is resorted to in TTL gates

to reduce propagation delay

to increase noise margin

to increase packing density

to increase fan out

⇒ The primary function of a clamper circuit is to

suppress variations in signal voltage

raise +ve half cycle to the signal

Lower -ve half cycle of the signal

introduce a dc level into an a.c. signal

⇒ The circuit shown in figure

low pass filter

high pass filter

band pass filter

band stop filter

⇒ The transistor of following figure in Si diode with a base current of 40 μA and I

_{CBO}= 0, if V

_{BB}= 6V, R

_{E}= 2 kΩ and β = 90, I

_{BQ}= 20 μA then I

_{EQ1800 μA180 μA2000 μA3000 μA}

⇒ For an P-N-P transistor in normal operation its junction are biased as

emitter base : reverse, collector base : forward

emitter base : forward, collector base : reverse

emitter base : forward, collector base : forward

emitter base : reverse, collector base : reverse

⇒ Two 2's complement number having sign bits X and Y are added and the sign bit of the result is Z. then, the occurrence of overflow is indicated by the Boolean function.

XYZ

X Y Z

X YZ + XY Z

XY + YZ + ZX

⇒

**Assertion (A):** Data communication using digital data must be very accurate.

**Reason (R):** In analog signals redundancy is available but in digital signals redundancy is not available.

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

⇒ Which of the following statement about JFET is correct?

In an N-channel JFET, the channel is the narrowest under zero gate bias condition

In a JFET the gates are always forward biased

In a JFET, gate-source cut off voltage is numerically equal to the pinch off voltage

It is a voltage controlled device

⇒ Binary 1111 when subtracted from binary 11111 is

101110

10110

10000

100010

⇒ In an amplitude modulated waveform, the amplitude of the sideband is

independent of the carrier amplitude

independent of the modulation index

carrier amplitude x modulation index

1/2 carrier amplitude x modulation index

⇒ Which of following antenna does not depend upon the frequency?

Log-periodic

Parabolic

Conical

All of the above