Question is ⇒ A square corner reflector is used in which of the following?, Options are ⇒ (A) TV broadcast, (B) Point-to-point communication, (C) Radio astronomy, (D) All of the above, (E) , Leave your comments or Download question paper.

Question is ⇒ A square corner reflector is used in which of the following?, Options are ⇒ (A) TV broadcast, (B) Point-to-point communication, (C) Radio astronomy, (D) All of the above, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	A square corner reflector is used in which of the following?
A.	TV broadcast [Wrong Answer]
B.	Point-to-point communication [Wrong Answer]
C.	Radio astronomy [Wrong Answer]
D.	All of the above [Correct Answer]
View Answer 1 -1 Explanation:- Answer : D 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 :

⇒ The most important set of specifications of transformer oil include
dielectric strength and viscosity
dielectric strength and flash point
viscosity and flash point
flash point and viscosity

⇒ Integral control action
removes offset
may lead to oscillatory response
both (a) and (b)
neither (a) nor (b)

⇒ The knee voltages in silicon and germanium diodes respectively are
0.3 V and 0.7 V
0.7 V and 0.3 V
0.7 V each
0.3 V each

⇒ A 6 bit ladder A/D converter has input 101001. The output is (assume 0 = 0 V and 1 = 10 V)
4.23
6.41
5.52
9.23

⇒ In VCR, the chrominance signal's frequency is
up converted during recording and down converted during playback
down converted during recording and up converted during playback
not changed during recording and playback
any of the above depending on VCR system

⇒ A pulse transformer uses
ferrite core
air core
iron core
copper core

⇒

Assertion (A): For an underdamped system with damping ratio ξ, the maximum overshoot is e-ξp/(1-ξ²)^0.5

Reason (R): Peak time of a second order under damped system = p/ω_d where ω_d is frequency of damped oscillations.

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 correct but R is wrong
R is correct but A is wrong

⇒ Which of the following antennas is not wide band?
Marconi
Helical
Folded dipole
Discone

⇒ Cross talk is due to reception of portions of a signal from one channel into another.
TRUE
FALSE

⇒ The unit of displacement density is
volt/metre
ampere/metre²
coulombs/metre
coulombs/metre²

⇒ At a given probability of error, binary coherent FSK is interior to binary coherent PSK by
6 dB
3 dB
2 dB
0 dB

⇒ The number of leads in a power semiconductor diode are
2
3
4
2 or 3

⇒

Assertion (A): Impedance matching can be done by using stubs.

Reason (R): A double stub is used for impedance matching when frequency of signal varies.

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 correct but R is wrong
A is wrong but R is correct

⇒ If it is desired to have low output impedance in an amplifier circuit then we should use
common collector circuit
common base circuit
common emitter circuit
either (b) or (c)

⇒ The maximum forward current in case of signal diode is in the range of
1 A to 10 A
0.1 A to 1 A
few milli amperes
few nano amperes

⇒ One XOR gate can work as
one bit magnitude comparator
two bit magnitude comparator
either (a) or (b)
neither (a) nor (b)

⇒ 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

⇒ Ac signals are given to both inverting and non-inverting terminals of an op-amp. When will the output maximum
when the phase difference between the inputs is 0°
when the phase difference between the inputs in 90°
when the phase difference between the inputs is 180°
when the phase difference between the inputs is 0 or 180°

⇒ A 4 bit ripple counter starts in 0000 state. When the counter reads 0010 the number of clock pulses which have occurred is
2
18
2 or 18
2 or 18 or 34

⇒ Which configuration is suitable for impedance matching?
CB
CE
CC
CB and CE

⇒ The causal system given below is _______
minimum phase
maximum phase
mixed phase
none of these

⇒ Two linearly polarized plane waves A and B travelling in free space in the positive x direction meet at a point. Wave A is polarized in the y direction and the wave B is polarized in the z direction. If the two waves are of equal amplitude and are in phase quadrature, the resultant wave will be
circularly polarized
elliptically polarized
linearly polarized
vertically polarized

⇒ The switching expression corresponding
C D + B C
C ⊙ D
C ⊕ D
CD

⇒ A reactor is used in a dual converter operating in non-circulating current mode.
TRUE
FALSE

⇒ In TE₁₀mode the largest electric field in a rectangular wave guide, occurs
along centre line of broad wall (i.e. x = a/2)
along the broad wall (i.e. x = 0 and x = a)
either (a) or (b)
neither (a) nor (b)

⇒ For a semiconductor, the conductivity is a function of the products of the number of charge carriers and their mobilites. As result, if the temperature of a slab of intrinsic silicon increases, how does its conductivity vary?
Decreases
Increases
Remains unaffected
Increases or decreases depending upon the rise in temperature

⇒ A single phase half wave converter is used to charge a battery of 50 V. The thyristor is continuously fired by dc signal. Input voltage is v = V_m sin ωt. The thyristor will conduct
from 0 to 180°
when v > 50 V
from 0 to 90°
When v < 50 V

⇒ In the human eye, an image persists for a time of about
1 second
0.1 second
0.05 second
0.02 second

⇒ A permeable substance is one
which is strong magnet
which is a weak magnet
which is a good conductor
through which magnetic lines of force can pass easily

⇒ The skin depth of copper is found to be 66 mm at 1 MHz at a certain temperature. At the same temperature and at 2 MHz, the skin depth would be approximately
47 μm
33 μm
92 μm
1.22 μm