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Q1. | The INTELSAT-IV satellite launched in 1974 had two earth coverage antenna and two narrower-angle antennas subtending 4.5°. The signal from narrow-angle antenna was stronger than that from earth- coverage antenna by a factor of |

A. | 17.34/4.5 [Wrong Answer] |

B. | 17.34 x 4.5 [Wrong Answer] |

C. | (17.34/4.5)^{2} [Correct Answer] |

D. | (17.34/4.5)^{4} [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ A MASER is a

low noise device

high noise device

medium noise device

may be either high or medium noise device

⇒ A point charge of 6 μC is located at the origin, uniform line charge density of 180

*n*C/

*m*of 8

*m*length lies along the

*x*axis and a uniform sheet of charge equal to 25

*n*C/

*m*

^{2}of area p x 4

^{2}lies in the

*z*= 0 plane. Calculate total electric flux leaving the surface of sphere of 4

*m*radius centered at origin.

86.97 μC

8.697

*n*C

8.697 μC

86.97

*n*C

⇒ E

_{g}is the band gap, A is pre-factor,

*k*is Boltzmann constant? Which one of the following is the remaining grade of paper used in paper capacitor, besides the other two grade of paper-low and extra low loss?

Strong dielectric

Regular

Rough

High loss

⇒ Thermal noise has a power spectral density which is quite uniform upto frequencies in the order of

100 Hz

10

^{6}Hz

10

^{9}Hz

10

^{13}Hz

⇒ The rotation of direction of E field of a linearly polarized wave passing through a magnetised ferric medium is called

Lorentz rotation

Faraday rotation

Steinmitz rotation

Fleming's rotation

⇒ If the reverse voltage across a

*p*-

*n*junction is increased three times, the junction capacitance

will decrease

will increase

will decrease by an approximate factor of about 2

will increase by an approximate factor of about 2

⇒ A junction Field Effect Transistor can operate in

depletion mode only

enhancement mode only

depletion and enhancement modes

neither depletion nor enhancement modes

⇒ A 3 input NAND gate is to be used as inverter. Which of the following will give better results?

The two unused inputs are left open

The two unused inputs are connected to 0

The two unused inputs are connected to 1

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

⇒ In a proportional plus integral control action

proportional gain K

*is adjustable but integral time T*

_{p}*is constant*

_{i}proportional gain K

*is adjustable but integral time T*

_{p}*is adjustable*

_{i}both proportional gain K

*and integral time T*

_{p}*are adjustable*

_{i}both proportional gain K

*and integral time T*

_{p}*are constant*

_{i}⇒ An RC driving point impedance function has zeros at

*s*= - 2 and

*s*= - 5. The admissible poles are

*s*= 0 and

*s*= -6

*s*= -1 and

*s*= -3

*s*= 0 and

*s*= -1

*s*= -3 and

*s*= -4

⇒ The advantage of Weinbridge oscillator over the phase shift oscillator is that oscillator the frequency may be varied over a range of

0.0430555555555556

0.04375

0.0451388888888889

0.0486111111111111

⇒ In figure the phase

will be 90° at ω = 0 and 0° at ω = ∞

will be 0° at ω = 0 and 90° at ω = ∞

will be 45° at ω = 0 and 0° at ω = ∞

will be 45° at ω = 0 and 90° at ω = ∞

⇒ Which of the following is the ferric electric material?

Rochelle salt

Barium titanate

Potassium dihydrogen phosphate

All of the above

⇒ The main application of enhancement mode MOSFET is in

amplifier circuits

oscillator circuits

switching circuits

all of the above

⇒ The rms value of wave in figur

about 95 V

about 80 V

about 50 V

about 25 V

⇒ For an N-point FFT algorithm with N = 2

^{m}which one of the following statements is TRUE?

It is not possible to construct a signal flow graph with both input and output in normal order

The number of butterflies in the

*m*

^{th}stage is N/m

In-place computation requires storage of only 2N node data

Computation of a butterfly requires only one complex multiplication

⇒ A directional microphone gives an output of 0.5 mV whereas an omnidirectional one gives an output of 0.5 μV in the same position for the same sound pressure. The directivity of the directional microphone is

120 dB

90 dB

60 dB

30 dB

⇒ Two voltages are 50 ∠0 V and 75 ∠ - 60° V. The sum of these voltages is

109 ∠ - 60° V

109 ∠ - 25° V

109 ∠ - 36.6° V

100 ∠ - 50.1° V

⇒ Which of the following is not the main characteristic of a FET?

Drain resistance

Forward transconductance

Temperature stability

Amplification factor

⇒ In a three input AND gate A = 1, B = 1, C = 0 The output Y =

ABC

ABC

ABC

ABC

⇒ If 8085 is required to add two 32 bit numbers, the numbers of addition sequences is

1

2

4

8

⇒ A resistor R of 1 Ω and two inductor L

_{1}and L

_{2}of inductances 1 H and 2 H respectively, are connected in parallel. At some time, the current through L

_{1}and L

_{2}are 1 A and 2 A, respectively. The current through R at time

*t*= ∞ will be

zero

0.0416666666666667

0.0833333333333333

0.125

⇒ A noise can be represented as superposition of spectral components. When this noise is passed through a narrow band filter, the output of filter should look like

sinusoidal

rectangular

triangular

none of the above

⇒ Negative feedback is used in audio amplifiers to

operate class C

reduce distortion

increase distortion

increase gain

⇒ In a half bridge inverter the gate pulses of the two thyristors have a phase displacement of

60°

90°

120°

180°

⇒ For a given line voltage, four heating coils will produce maximum heat when connected

all in parallel

all in series

with two parallel pairs in series

one pair in parallel with the other two in series

⇒ A plane electromagnetic wave travels in dielectric medium of relative permittivity 9. Relative to free space, the velocity of propagation in the dielectric is

increased by a factor of 9

increased by a factor of 3

unchanged

reduced by a factor of 1/3

⇒ X-rays cannot penetrate through a thick sheet of

wood

paper

lead

aluminium

⇒ Some of MOS families are PMOS, CMOS, the family dominating the LSI field, where low power consumption is necessary is

NMOS

CMOS

PMOS

both NMOS, CMOS