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Q1. | Which of the following is a better propagation mode to propagate television frequency modulation and radar signals? |

A. | Satellite communication [Correct Answer] |

B. | Ground propagation [Wrong Answer] |

C. | Polarized communication [Wrong Answer] |

D. | None of the above [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 :**

⇒ Consider the following statements

- The sign of a floating point number depends on the sign of mantissa only.
- If the absolute value of a number is less than 1, the sign of exponent is zero or positive.
- With sign bit of mantissa as 0, increasing the exponent from a positive to a more positive value gives a larger floating point number.

All

1 and 2 only

1 and 3 only

2 and 3 only

⇒ The following Variable Entered Map (VEM) represents which of the following funct

*f*(A, B, C, D) = ∑(1, 2, 3, 4, 7, 8, 9, 14, 15) + Φ(3, 5, 12, 13)

*f*(A, B, C, D) = ∑(1, 2, 4, 8, 10, 8, 13, 15) + Φ(3, 6, 12, 14)

*f*(A, B, C, D) = ∑(1, 2, 4, 7, 8, 10, 13, 15) + Φ(6, 12, 13)

*f*(A, B, C, D) = ∑(1, 2, 4, 7, 8, 9, 12, 13) + Φ(3, 5, 14, 15)

⇒ A trigonometric function is synonyms to

orthogonal function

triangular function

singular function

none of the above

⇒ Which of the following has highest power gain?

CE

CC

CB

CB or CC

⇒ For the time domain response shown in figure the

lies in left half plane

lies on imaginary axis

lies along the positive real axis

may be complex or imaginary

⇒ In a base driver amplifier the voltage gain is the ratio of

ac collector voltage to ac base voltage

ac emitter voltage to ac base voltage

ac collector voltage to ac emitter voltage

ac base voltage to ac emitter voltage

⇒ A modem is classified as low speed if data rate handled is

upto 100 bps

upto 250 bps

upto 400 bps

upto 600 bps

⇒ In cellphone communication base antennas are connected to other base antennas in

line of sight communication

ionospheric propagation

ground wave propagation

medium wave propagation

⇒ A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The voltage multiplication is

25

50

125

250

⇒ In a CD the channel separation is

1 μm

1.6 μm

2.5μm

4 μm

⇒ In which

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JFET

Depletion type MOSFET

Enhancement type MOSFET

Both (b) and (c)

⇒ Two coupled coils lie in parallel planes such that 50% of magnetic flux produced by one links the other. The coefficient of coupling is

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0.25

0.125

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⇒ When the number of quantising levels is 16 in PCM, the number of pulses in a code group will be

3

4

8

16

⇒ If (225)

_{Y}= (165)

_{8}find value of Y

7

8

9

11

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

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mmf for iron is much less than that for air gap

mmf for iron is much more than that for air gap

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⇒ Which of the following Boolean algebra rules is correct?

A . A = 1

A + AB = A + B

A + A B = A + B

A(A + B) = B

⇒ A standard cell of 1.0185 V is used with a slide wire potentiometer. The balance was obtained at 60 cm. When an unknown emf was connected, the balance was obtained at 82 cm. The magnitude of unknown emf is

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0.75 V

13.9 V

7.45 V

⇒ A radar has a maximum range of 120 km. The maximum allowable pulse repetition frequency for unambiguous reception is

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330

2500

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⇒ Vividh Bharati programme is transmitted in

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medium frequency

very high frequency

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⇒ 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

⇒ Which of the following modes cannot exist in rectangular resonant cavity?

TE

_{110}

TE

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TM

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TM

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⇒

**Assertion (A):** The circuit in figure produces repetitive narrow pulses when input is fed with sine or triangular waveform having peak value more than + V

**Reason (R):** The high gain op-amp produces voltages at two levels. If input is more than + V, the output is + 15 V otherwise the output is - 1

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒

**Assertion (A):** A class C amplifier can also be used as frequency multiplier

Both A and R are correct and R is correct explanation for A

Both A and R are correct but R is not correct explanation for A

A is correct R is wrong

A is wrong R is correct

⇒ A 3 bit binary adder can add

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3 bits

8 bits

⇒ When a function Z(

*s*) having a pole at infinity is realized, we get

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a resistance in series

an inductance in series

a resistance or inductance in series

⇒ In figure, S is closed at

*t*= 0. At

*t*=

*t*

_{1}, I = 1 A and

*di*/

*dt*= 1 A/s. Then the value of

1 H

2 H

3 H

4 H

⇒ In a microprocessor

one machine cycle is equal to one clock cycle

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⇒ Out of multiplexer and demultiplexer, which can be used as a logic function generator?

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Demultiplexer only

Both

None

⇒ What is the direction of control

Unidirectional into μ

*p*

Unidirection out of μ

*p*

Bidirectional

Mixed direction, i.e., some lines into μ

*p*an some others out of μ

*p*