Question is ⇒ A very reliable service has to be established between two points on earth separated by 1000 km. The band that will be used as, Options are ⇒ (A) MF, (B) VHF, (C) VLF, (D) HF, (E) , Leave your comments or Download question paper.

Question is ⇒ A very reliable service has to be established between two points on earth separated by 1000 km. The band that will be used as, Options are ⇒ (A) MF, (B) VHF, (C) VLF, (D) HF, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	A very reliable service has to be established between two points on earth separated by 1000 km. The band that will be used as
A.	MF [Wrong Answer]
B.	VHF [Wrong Answer]
C.	VLF [Correct Answer]
D.	HF [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 :

⇒ Which of the following bus is used to transfer data from main memory to peripheral device?
DMA bus
Output bus
Input bus
Data bus

⇒ The main advantage of DM over PCM is
less bandwidth
less power
simple circuit
better S/N ratio

⇒ A bipolar transistor is a __________ controlled devices whereas a FET is a __________ controlled devices.
current, voltage
current, current
voltage, current
voltage, voltage

⇒ Avalanche beakdown is primarily dependent on the phenomenon of
doping
collision
recombination
ionization

⇒ The addition of a pole to the open loop transfer function pulls the root locus
to the right
to the left and making the system more stable
towards right or left depending on the position of new pole
none of the above

⇒ The decimal equivalent of the hexadecimal number E 5 is
279
229
327
0

⇒ When the core of a saturable reactor is saturated, the inductance is high.
TRUE
FALSE

⇒ The circuit show
voltage series feedback amplifier
transconductance amplifier
transresistance amplifier with open circuit mutual resistance R_F
transresistance amplifier with short circuit mutual resistance R_F

⇒ In indicating instruments the controlling torque is provided by a spring.
TRUE
FALSE

⇒ Ferromagnetic materials show hysteresis in B - H characteristic. As the magnetic field in increased slowly from zero value, what is the first process which sets the material to give net magnetization?
Growth of favourably oriented domains at the cost of other domains by reversible boundary displacements
Growth of favourably oriented domains at the cost of other domains by irreversible boundary displacements
Domain wall orientation
A combination of processes (a) and (c) above

⇒ Dual slope ADC uses an op amp comparator.
TRUE
FALSE

⇒ Which of the following is not a proper FORTRAN expression?
B + A / C - D
(A + C) / (B + D)
B + * A / C
A ** (B + 2)

⇒ In anti-ferromagnetic materials, the graph of susceptibility versus temperature shows a sharp maximum at a certain temperature. This temperature is known as
Curie temperature
Neel temperature
Weiss temperature
Bitter temperature

⇒ A divide by 78 counters can be realized by using
six mod-13 counters
thirteen mod-6 counters
one mod 13 counter followed by one mod-6 counter
thirteen mod-13 counters

⇒ Coulomb friction is
the force of sliding friction between dry surfaces
the force of friction between moving surfaces separated by viscous fluid
the force required to initiate motion between two contacting surfaces
all of the above

⇒ Which of the following is non-sinusoidal oscillator?
Multivibrator
Relaxation oscillator using UJT
Relaxation oscillator using tunnel diode
Any of the above

⇒ In the circuit of figure the current through L at t = &infin
0
0.416666666666667
6.67 A
5.1 A

⇒ If C is spring constant and θ is deflection, controlling torque is
Cθ
C/θ
θ/C
C²θ

⇒ Find the Fourier transform of the half cosine pulse as shown bel
0.5 {sin c [0.25(f - 1)] + sin c [2.5(f + 1)]}
0.5 {sin c [0.5(f - 1)] + sin c [0.5(f + 1)]}
0.25 {sin c [0.25(f - 1)] + sin c [0.25 (f - 1)]}
0.25 {sin c [0.5(f - 1)] + sin c [0.5(f - 1)]}

⇒ In figure V_CC = + 30 V, I_C corresponding to Q point is 1 mA. If R_C = 5 kΩ and R_E = 5 kΩ, V_CE corresponding to Q poin
30 V
20 V
25 V
5 V

⇒ A transmission line having 50 Ω impedance is terminated in a load of (40 + j 30) Ω. The VSWR is
j 0.033
0.8.+ j 0.6
1
2

⇒ In a normally biased N-P-N transistor the main current crossing the collector junction is
a drift current
a hole current
a diffusion current
same as the base current

⇒ In graphical analysis of BJT amplifier the slope of ac line is more than that of dc load line.
TRUE
FALSE

⇒ In a Vidicon camera tube
grid G₁ accelerates electrons
grid G₂ accelerates electrons and grid G₃, slows down electrons
grid G₃ accelerates electrons and grid G₂ slows down electrons
both grids G₂ and G₃ accelerate electrons

⇒ Which mode has the lowest cut off frequency in circular wave guides?
TE₀₁
TE₁₁
TE₂₀
TE₂₁

⇒ In a superheterodyne receiver, having no RF amplifier, the IF is 455 kHz. The image frequency at 1000 kHz is
1455 kHz
545 kHz
1910 kHz
90 kHz

⇒ The scale of a dynamometer is linear when used as
ammeter
voltmeter
wattmeter
both (a) and (c)

⇒ The capacitance of a cylindrical capacitor is directly proportional to its length.
TRUE
FALSE

⇒ Which of the following assembler directives in 8085 does not cause any memory location to be used μp?
D S
D B
D W
E Q U

⇒ Which of the following is an indirect way of generating FM?
Armstrong modulator
Varactor diode modulator
Reactance FET modulator
Reactance bipolar transistor