Question is ⇒ Microwave links are typically 50 km apart, Options are ⇒ (A) because of atmospheric attenuation, (B) because of output tube power limitation, (C) because of earth's curvature, (D) to ensure that applied <i>dc</i> voltage is not excessive, (E) , Leave your comments or Download question paper.

Question is ⇒ Microwave links are typically 50 km apart, Options are ⇒ (A) because of atmospheric attenuation, (B) because of output tube power limitation, (C) because of earth's curvature, (D) to ensure that applied <i>dc</i> voltage is not excessive, (E) , Leave your comments or Download question paper. dc voltage is not excessive, (E) , Leave your comments or Download question paper. '/> dc voltage is not excessive, (E) , Leave your comments or Download question paper. '/>Previous question Next question


Q1.	Microwave links are typically 50 km apart
A.	because of atmospheric attenuation [Wrong Answer]
B.	because of output tube power limitation [Wrong Answer]
C.	because of earth's curvature [Correct Answer]
D.	to ensure that applied dc voltage is not excessive [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ For a series RLC circuit bandwidth is ω₂ - ω₁ = R/2L.
TRUE
FALSE

⇒ The magnitude response of a normalised Butterworth low pass filter is
linear starting with value of unity at zero frequency and 0.707 at cut off frequency
non linear all through but with values of unity at zero frequency and 0.707 at cut off frequency
linear upto cut off frequency and nonlinear thereafter
nonlinear upto cut off frequency and linear thereafter

⇒ The action of backward wave oscillator is similar to that of
klystron amplifier
reflex klystron oscillator
TWT
magnetron

⇒ A transmission line has primary constants R, L, G and C and secondary constant z₀ and γ = (a + Jβ). If the line is loss less, then
R = 0, G ≠ 0, and a = 0
R = 0, G = a, 0 and β = |r|
G = 0, a = β
R = 0, G = 0, a = 0, β = |r|

⇒ A class C amplifier has input frequency of 200 kHz. If width of collector pulses is 0.1 μs, duty cycle is
0.01
0.02
0.1
0.2

⇒ The amount of time between the creation and disappearance of a hole in an intrinsic semiconductor material is called
life cycle
recombination time
life time
half life

⇒

Assertion (A): Relative permittivity is determined by the atomic structure of the material.

Reason (R): Absolute permittivity is determined by the atomic structure of the material.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true

⇒ If one wants to design a binary counter, preferred type of flip-flop is
D-type
SR type
Latch
JK type

⇒ The logic circuit of the given figure realizes the func
(A + B + C)(D)(E)
(A + B + C) (D)(E)
(A + B = C) (D)(E)
(A + B + C)(D)(E)

⇒ When a voltage is applied to a semiconductor crystal then the free electrons will flow.
towards positive terminal
towards negative terminal
either towards positive terminal or negative terminal
towards positive terminal for 1 μs and towards negative terminal for next 1 μs

⇒ The portion of the atmosphere closest to ground is called ionosphere.
TRUE
FALSE

⇒ For a resistance of about 15 kΩ operating in a frequency range of a few MHz, the noise voltage is in the range of
a few μV
about 100 μV
a few μV
a few volts

⇒ A thyristor is reverse biased. A positive gate pulse is applied. The thyristor
will be turned on
may or may not turn on
will not turn on
will turn on after sometime

⇒ Permeability is analogous to
conductivity
resistivity
retentivity
coercivity

⇒ Consider the following statements

Tellegen's theorem is applicable to any lumped network.
Reciprocity theorem is applicable to linear bilateral network.
Thevenin theorem is applicable to two terminal linear active network.
Norton's theorem is applicable to linear active network.

Which of the above statements are correct?
1, 2 and 3
1, 2, 3 and 4
1, 2 and 4
3 and 4

⇒

Assertion (A): When reverse voltage across a p-n junction is increased, the junction capacitance decreases.

Reason (R): Capacitance of any layer is inversely proportional to thickness.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true

⇒ In a linear bilateral passive element two port which of the following holds for z parameters?
z₁₁ = z₂₂
z₁₂ z₂₂ = z₁₁ z₂₂
z₁₁ z₁₂ = z₂₂ z₂₁
z₁₂ = z₂₁

⇒ A bulb rated at 60 W, 120 V is used for 30 minutes. The charge associated with this operation is
3600 C
900 C
7200 C
600 C

⇒

Assertion (A): Power transistor has lower switching time than SCR

Reason (R): Power transistor has greater switching time than SCR

Both A and R are correct and R is correct explanation of A
Both A and R correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct

⇒ In an end fire array, the radiation pattern
is in the plane of array
is at right angles to array
is at an angle to the plane of array
either (b) or (c)

⇒

Assertion (A): Shunt of an ammeter has a low resistance.

Reason (R): Shunt may be connected in series or in parallel with ammeter.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true

⇒ The intrinsic resistivity of silicon at 300 K is about
1 Ω-cm
400 Ω-cm
10000 Ω-cm
230000 Ω-cm

⇒ The disadvantage of transformer coupling in amplifier is
cost of transformer at audio frequencies
size of transformer at audio frequencies
size of transformer at radio frequencies
cost and size of transformer at audio frequencies

⇒ Stepper motors find applications in
X-Y plotters
numerically controlled machining equipment
printers
all of the above

⇒

Assertion (A): Megger is used to check insulation resistance of cables.

Reason (R): Insulation resistance of cables is very high.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true

⇒ In the circuit of figure, the switch is closed at t = 0. At t = 0⁺ the current through
0.166666666666667
2.5 A
3.1 A
0

⇒ The secondary constants of a line are
Z₀
Z₀ and γ
Z₀, γ and wave velocity
Z₀, γ and L

⇒ In frequency modulation noise can be further reduced by
increasing deviation
reducing deviation
reducing carrier frequency
increasing signal amplitude

⇒ 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

⇒ The correct sequence of subsystem in an FM receiver is
mixer, RF amplifier, limiter, IF amplifier, discriminator, audio amplifier
RF amplifier, mixer, IF amplifier, limiter, discriminator, audio amplifier
RF amplifier, mixer, limiter, discriminator, IF amplifier, audio amplifier
mixer, IF amplifier, limiter, audio amplifier, discriminator