Question is ⇒ The absorption of EM wave by the atmosphere depends on, Options are ⇒ (A) polarization of waves, (B) frequency in use, (C) dist. from Ty, (D) height of antenna, (E) , Leave your comments or Download question paper.

Question is ⇒ The absorption of EM wave by the atmosphere depends on, Options are ⇒ (A) polarization of waves, (B) frequency in use, (C) dist. from Ty, (D) height of antenna, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The absorption of EM wave by the atmosphere depends on
A.	polarization of waves [Wrong Answer]
B.	frequency in use [Correct Answer]
C.	dist. from T_y [Wrong Answer]
D.	height of antenna [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : B 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 :

⇒ Strength of space wave is not dependent on distance.
TRUE
FALSE

⇒ Equation x_l0 = 11001001₂ when solved for x gives the value of x as
8
111
152
201

⇒ A battery charger can drive a current of 5A with 1Ω resistance connected at its output. If it can charge 2 V battery at 7 A rate, its Thevenin's equivalent circuit will be
7.5 in series with 0.5 Ω resistance
1.25 V in series with 1.5 Ω resistance
7.5 V in parallel with 0.5 Ω resistance
12.5 V in parallel with 1.5 Ω resistance

⇒ In a hi-fi system the frequency response over the audio frequency range should be within
± 10 dB
5 dB
2 dB
1 dB

⇒ At corner frequency the phase angle of factor 1/(1 + jωT) is
+90°
-90°
+45°
-45°

⇒ The channel required for FM telemetry is
same as required for AM telemetry
smaller than that required by AM telemetry
100 times that required for AM telemetry
10 times that required for AM telemetry

⇒ In a common Emitter BJT amplifier, the maximum usable supply voltage is limited by
avalanche breakdown of Base emitter junction
collector to Base Breakdown voltage with emitter open (βV_CBO)
collector Emitter Breakdown voltage with base open (βV_CBO)
zener breakdown voltage of the emitter base Junction

⇒ In switching devices, gold doping is used to
improve bonding
reduce storage time
increase the mobility of the carrier
protect the terminals against cooperation

⇒ If figure, power dissipated in 30Ω resistance will be maximum when value of
30 Ω
16 Ω
9 Ω
zero

⇒ When a lead acid cell is in fully charged condition the specific gravity of electrolyte is about 1.22.
TRUE
FALSE

⇒ The magnitude plot of a composite signal x(t) = e^2jt + e^3jt is
Half wave rectified sinusoid
Full wave rectified sinusoid
Exponentially increasing sinusoid
Exponentially decreasing sinusoid

⇒ In which one of the following types of analog to digital converts the conversion time is practically independent of the amplitude of the analog signal?
The dual slope integrating type
Successive approximation type
Counter ramp type
Tracking type

⇒ The saving of power in DSB-SC modulated at 80% is
NIL
0.8
0.7576
0.5

⇒ The parity bit is
always 1
always 0
1 or 0
none of the above

⇒ Consider the following statements about root locus

The intersection of root locus branches with the imaginary axis can be determined by the use of Routh criterion
Segments of real axis having an odd number of real axis open loop poles plus zeros to their right are not parts of root locus
The number of root locus branches terminating on infinity is always zero

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

⇒ To cover all inhabited regions of the Earth, the number of geosynchronous communication satellites required
5
3
10
2

⇒ The transconductance curve of a JFET is
a straight line
parabolic
hyperbolic
inverted V-type

⇒ Special circuits using neon tubes, contact relays and capacitors are used in many domestic appliances. The role of capacitor in figure i
reduce power loss
function as resistor when relay is on
delay the operation of the contact relay after switching on
open circuit the relay terminals

⇒ A sinusoidal signal with peak to peak amplitude of 1.536 volt is quantized into 128 levels using a mid-rise uniform quantizer. The quantization noise power is
0.768 V
48 x 10^-6 V
12 x 10^-6 V
3.072 Volt

⇒ The product kT (where k is Boltzmann's constant and T is absolute temperature) at room temperature is about
0.051 eV
0.026 eV
0.01 eV
0.001 eV

⇒ Which dc servomotor has minimum inertia?
Slotted armature construction
Surface wound armature
Surface wound with stationary rotor
Either (a) or (b)

⇒ For high frequency response of a transistor amplifier, suitable model to use is
Kelvin network
Lattice network
Hybrid p
T-network

⇒ If each frequency component of f(t) is shifted by p/2, the resulting signal is
Hilbert transform of f(t)
Inverse Hilbert transform of f(t)
Laplace transform of f(t)
Fourier transform of f(t)

⇒ Find resistance R_B to bring transistor to threshold of saturation V_CB = 0, V_BE = 0.7 V, a =
1.5 kΩ
15 kΩ
10 kΩ
1 kΩ

⇒ A string constant in basic is
a string of capital alphabets A to Z, included in question mark
a string of capital alphabets A to Z and digits 0 to 9 included in question mark
a string of capital alphabets A to Z, digits 0 to 9 and special characters
a string of capital alphabets A to Z, digits 0 to 9 and special characters included in question mark

⇒ Maximum usable frequency is [f_muf]
f_c sec i
f_c cos i
f_c sin i
f_c sec i

⇒ DC servomotors are, generally
permanent magnet dc motors
shunt field motors
separately excited dc motors
none of the above

⇒ McMurrary full bridge inverter uses
auxiliary commutation
complementary commutation
natural commutation
any of the above

⇒ MCVF telegraphy causes
SSB techniques
pulse modulation
Out of bond signalling
FM

⇒ One T state is precisely equal to one clock period.
TRUE
FALSE