Q1. | Tropospheric scatter propagation is not subject to any fading. |

A. | TRUE [Wrong Answer] |

B. | FALSE [Correct Answer] |

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

⇒ An RLC series circuit has R = 30 Ω, X

_{L}= 30 Ω and X

_{C}= 30 W. Its impedance is

30 ∠0°.

30 ∠45°

42.42 ∠45°

90 ∠45°.

⇒ A moving iron instrument has

two iron vanes, one fixed and one movable

two movable iron vanes

two aluminium vanes, one fixed and one movable

two vanes, one fixed made of Aluminium and the other movable made of iron

⇒ In a full bridge circuit supplying an RLC under damped circuit

the waveshapes of output voltage and load current are square

the waveshapes of output voltage and load current are sinusoidal

the waveshapes of output voltage is square but the waveshape of load current is nearly sinusoidal

none of the above

⇒ The system in the given figure

good gain and phase margins

good gain margin and poor phase margin

poor gain and phase margins

poor gain margin but good phase margin

⇒ Both Impatt and Trapatt devices use avalanche effect

TRUE

FALSE

⇒ The following circuit diagram resembl

logic 0

logic 1

*f*(A, B, C) = Σ

*m*(0, 1, 4, 6, 7)

none

⇒ For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the characteristic impedance will be

14 Ω

28 Ω

39 Ω

79 Ω

⇒ In a CE amplifier circuit the emitter by pass capacitor is remove. The ac output voltage

increases

remains the same

increases or decreases

decreases

⇒ Complex pole in z-plane is as shown below. This is the pole diagram for ________

Decaying sinusoidal sequence

Growing sinusoidal sequence

Decaying non sinusoidal sequence

Growing non sinusoidal sequence

⇒ Assuming that flip-flops are in reset condition initially, the count sequence observed at Q

_{A}in the circuit show

0010111...

0001011...

0101111...

0110100...

⇒ In a system an input resistance of 20 kΩ causes a noise voltage of 15μV. If two such input resistances each of 20 kΩ are used in parallel, the total noise voltage will be about

15 μV

30 μV

7.5 μV

10.6 μV

⇒ A zero mean white Gaussian noise is passed through an ideal low pass filter of bandwidth 10 kHz. The output of the samples so obtained would be

correlated

statistically independent

uncorrelated

orthogonal

⇒ A periodic rectangular signal,

*x*(

*t*) has the waveform shown in the given figure. Frequency of the fifth harmonic of its spectrum is _______

200 Hz

250 Hz

400 Hz

1250 Hz

⇒ The audio frequency range is

5 Hz to 1 kHz

50 Hz to 20 kHz

16 Hz to 20 kHz

0 Hz to 20 kHz

⇒ The important postulate arising out of Maxwell's modification of Ampere's law is

a changing magnetic field produces an electric field

a changing electric field produces a magnetic field

a motional e.m.f. is produced by a coil moving in a magnetic field

a steady current produce a magnetic field

⇒ In Z

_{RC}(

*s*) = 0 at

*s*= ∞, the last element in first Cauer form is

R

C

R and C in series

R and C in parallel

⇒ Two sinusoidal signals of same amplitude and frequencies 10 kHz and 10.1 kHz are added together. The combined signal is given to an ideal frequency detector. The output of the detector is

0.1 kHz sinusoidal

10.1 kHz sinusoidal

a linear function

a constant

⇒ Four capacitors are in parallel. Their values are 36.3 μF, 3.85 μF, 34.002 μF and 850 μF with an uncertainty of digit in the last place. The total capacitance in significant figures is

75.0 μF

75.0 ± 0.1 μF

75.1 ± 0.1 μF

75.002 ± 0.1 μF

⇒ In case of a low level AM transmitter, the amplifier modulated stage must be

class A

class B

class B (linear)

class C

⇒

**Assertion (A):** The exponential form of Fourierserie

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

⇒ The force in a magnetic field is given by F = *qv*B

F and *q* are perpendicular and *v* and B are perpendicular

F and *q* only are perpendicular to each other

F and *v*, F and B are mutually perpendicular to each other and *v* and B at any angle between them

All the four components are perpendicular to each other

⇒ For the system of the given figure, the undamped natural frequency of closed loop pole

2 rad/sec

1 rad/sec

0.5 rad/sec

0.25 rad/sec

⇒ The analog signal given below is sampled by 600 samples per second for *m*(*t*) = 3 sin 500 p*t* + 2 sin 700 p*t* then folding frequency is

500 Hz

700 Hz

300 Hz

1400 Hz

⇒ An amplifier with resistive -*ve* feedback has two left poles in its open loop transfer function. The amplifier

will always be unstable at high frequencies

will be stable for all frequencies

may be unstable, depending on the feedback factor

will oscillate at low frequencies

⇒ Binary number 1101101101 is equal to decimal number

3289

2289

1289

289

⇒ An ideal op-amp has zero slew rate.

TRUE

FALSE

⇒ The units of transistor *h* parameters *h*_{11} and *h*_{22} are the same.

TRUE

FALSE

⇒ In Z_{RC} (*s*) has a pole at *s* = ∞, the last element in first Foster realization is

R

C

R and C in series

R and C in parallel

⇒ In a transistor with normal bias

the emitter junction has a low resistance

the emitter junction has a very high resistance

the emitter junction supplies majority carries into the base region

none of the above

⇒ A decade counter

counts for ten days

counts ten times faster than a binary counters

counts to 9 and reset on the next pulse

reverts on the pulse after the tenth