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Q1. | Microwave signals follow the curvature of the earth and the phenomenon |

A. | tropospheric scatter [Wrong Answer] |

B. | faraday effect [Wrong Answer] |

C. | duct propagation [Correct Answer] |

D. | none [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ Bit is a unit of

entropy

information

channel capacity

rate of information

⇒ A casual LTI system is described by the difference equat

|a| = 2 |β| < 2

|a| > 2 |β| > 2

|a| < 2 any value of β

|β| < 2, any value of a

⇒ The effective modulation index is:

0.91287

0.8306

1

none of these

⇒ An LED has a rating of 2 V and 10 mA. It is used along with 6V battery. The range of series resistance is

0 to 200 Ω

200 - 400 Ω

200 Ω and above

400 Ω and above

⇒ During discharging a capacitor through a resistance, voltages across R and C are equal in magnitude.

TRUE

FALSE

⇒ At room temperature the number of conducting electrons in an intrinsic semiconductor

is almost equal to the number of valence electrons

is about half the number of valence electrons

is small as compared to the number of valence electrons

is a very small fraction of the number of valence electrons

⇒ Which of the following is not a valid integer constant in C (for 16 bit)?

321

-162

-65321

1

⇒ Which of the following statement is correct?

Decimal 9 is represented as 1011 in Excess-3 code

Decimal 9 is represented as 1001 is BCD code

Decimal 10 is represented as 1100 is Gray code

Decimal 10 is represented as 1001 in binary code

⇒ M circles are symmetrical with respect to real axis.

TRUE

FALSE

⇒ Which one of the following rules determines the mapping of

*s*-plane to

*z*-plane?

Right half of the s-plane maps into outside of the unit circle in

*z*-plane

Left half of the

*s*-plane maps into outside of the unit circle.

Imaginary axis in

*s*-plane maps in to the circumference of the unit circle.

All of the above

⇒ Coupling and bypass filters can be a source of

low-frequency parasitics

high-frequency parasitics

carrier frequency parasitics

none of the above

⇒ Binary number 1101101101 is equal to decimal number

3289

2289

1289

289

⇒ In a network

Number of links = Number of branches - number of nodes + 1

Number of links = Number of branches - number of nodes

Number of links = Number of branches - number of nodes - 1

Number of links = Number of branches - number of nodes - 2

⇒ The maximum power dissipation capacity of a transistor is 50 mW. If the collector emitter voltage is 10 V, what is the safe collector current that can be allowed through the transistor?

5 mA

2.5 mA

10 mA

25 mA

⇒ If word length is 16 bits the decimal equivalent of largest number which can be stored is

32767

32766

16383

16384

⇒ A broadside array is shown in figure in which the elements are placed at equal distances. The direction of maximum radiation is represented

AA

BB

CC

DD

⇒ The depletion layer in a reverse biased

*p*-

*n*junction is due to the presence of

electrons

holes

both electrons and holes

immobile ions

⇒ When the magnetic vector is parallel to the boundary surface and electric vector is parallel to the place of incidence, the polarization is

zero

vertical

perpendicular

horizontal

⇒ In a second order system ω

*= 10 rad/sec and ζ = 0.1, then ω*

_{n}_{d}=

9.1 rad/sec

9.95 rad/sec

9 rad/sec

1 rad/sec

⇒ Find the FSV (full scale voltage) in a 6 bit R-2

*R*ladder D/A converter has a reference voltage of 6.5 V.

6.4 V

0.1 V

7 V

8 V

⇒ In the field controlled motor the entire damping comes from

armature resistance

back emf

motor friction and load

field resistance

⇒ In the given figure shows a root locus plot. Consider the following statements for this plot

- The open loop system is a second order system
- The system is overdamped for K > 1
- The system is stable for all values of K

1, 2, 3

1, 3

2, 3

1, 2

⇒ Bandwidth is proportional to speed of response.

TRUE

FALSE

⇒ When a UJT is used as a relaxation oscillator the current should be

less than I

_{p}

more than I

_{v}

more than I

_{p}but less than I

_{v}

negative

⇒ The memory hierarchy in microprocessor based system is

register, cache, primary, mass, off line back up

cache, register, primary, mass, off line back up

cache, register, mass, primary, off line back up

register, cache, mass, primary, off line back up

⇒ Binary number 1101.101 is equivalent to decimal number?

13.5

13.75

13.625

13.875

⇒ Generally op amp is used in

open loop

closed loop

cascaded loop

either (a) or (c)

⇒ For a periodic waveform, the power spectral density and correlation function form

a Laplace transform pair

a Fourier transform pair

either (a) or (b)

neither (a) nor (b)

⇒ A certain JK FF has

*t*= 12 n sec the largest MOD counter that can be constructed from these FF and still operate up to 10 MHz is

_{pd}any

8

256

10

⇒ The number of bits in EBCDIC is

12

10

8

6