Question is ⇒ The function of duplexer in a RADAR is, Options are ⇒ (A) to permit the use of same antenna for transmission and reception, (B) to provide gain to the transmitted power, (C) to amplify the received signal, (D) both (b) and (c), (E) , Leave your comments or Download question paper.

Question is ⇒ The function of duplexer in a RADAR is, Options are ⇒ (A) to permit the use of same antenna for transmission and reception, (B) to provide gain to the transmitted power, (C) to amplify the received signal, (D) both (b) and (c), (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The function of duplexer in a RADAR is
A.	to permit the use of same antenna for transmission and reception [Correct Answer]
B.	to provide gain to the transmitted power [Wrong Answer]
C.	to amplify the received signal [Wrong Answer]
D.	both (b) and (c) [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : A 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 attenuation in waveguide above to cut off frequency
very high
very low
zero
infinite

⇒ The number of bits in EBCDIC is
12
10
8
6

⇒

Assertion (A): Power transistors are more commonly of silicon npn type.

Reason (R): The fabrication of silicon npn transistors is easy.

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

⇒ An SBS can conduct is one direction only.
TRUE
FALSE

⇒ A trigonometric function is synonyms to
orthogonal function
triangular function
singular function
none of the above

⇒ The 8086 arithmetic instruction work on

signed and unsigned numbers
ASCII data
unpacked BCD data

Select the correct answer using the codes given below :
1 and 2
1 and 3
2 and 3
1, 2 and 3

⇒ In using KCL it is necessary that current leaving a node is written as negative.
TRUE
FALSE

⇒ To obtain very high I/P and O/P impedances in a feedback amplifier, the topology used is
voltage series
current series
voltage shunt
current shunt

⇒ Panel type instruments are used in
power stations
automobiles
industries
all of the above

⇒ Piezoelectric effect can be used to measure
force
strain
acceleration
all of the above

⇒ Both ROM and RAM can be accessed randomly.
TRUE
FALSE

⇒ Find 'X' in the circuit bel
p(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
0
Σ(14)
1

⇒ In energy band diagram of n type semiconductor, the donor energy level is
in valence band
in conduction band
slightly above valence band
slightly below conduction band

⇒ An electron in the conduction band
has higher energy than the electron in the valence band
has lower energy than the electron in the valence band
loses its charge easily
jumps to the top of the crystal

⇒ Race condition always arises in
synchronous circuit
asynchronous circuit
combinational circuit
digital circuit

⇒ In 8085 microprocessor, the interrupt enable flip-flop is reset by
DI instruction only
system RESET only
interrupt acknowledgment only
all of the above

⇒ Consider the following statements about Java variables

Java variable must start with a letter or underscore or dollor sign.
Java variable can not start with a digit.
After the first character the variable can have any combination of letters or numbers.
Capitalization of letters must be consistent.

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

⇒ Eddy current loss is
proportional to frequency
independent of frequency
proportional to (frequency)²
proportional to (frequency)³

⇒ Indicate the false statement: If SWR on a transmission line is infinite, the line is terminated in
open circuit
short circuit
pure reactance
complex impedance

⇒ A full adder has two outputs SUM and CARRY.
TRUE
FALSE

⇒ A full adder can be made out of
two half adders
two half adders and a OR gate
two half adders and a NOT gate
three half adders

⇒ An oscillator at 4.2 MHz is followed by two frequency doublers and two triplers. The output frequency will be
84 MHz
112.4 MHz
151.2 MHz
303.4 MHz

⇒ The relaxation time of electrons in a metal is of the order of
10^-6 secs
10^-10 secs
10^-14 secs
10^-20 secs

⇒ The digit F in hexadecimal system is equivalent to number __________ in decimal system.
16
15
17
8

⇒ In 8085 the instruction MOV A, M is an example of
Direct addressing
Immediate addressing
Register addressing
Register indirect addressing

⇒ Which of the following is a disadvantage of Vestigial Sideband (VSB) system?
Low video frequencies are attenuated
Bandwidth is conserved resulting in a saving of 2 MHz per channel over DSB system
It results in a power boost of two video frequencies
It possess the advantages of both DSB and SSB system

⇒

Assertion (A): Impatt diode can be used in both amplifiers and oscillators.

Reason (R): Impatt diode has a low resistance.

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

⇒ An m derived low pass filter has f_c = 1000 Hz, f_∞ = 1250 Hz and m = 0.6. If m is increased, then
both f_c and f_∞ will increase
both f_c and f_∞ will decrease
f_c will remain constant but f_∞ will decrease
f_c will remain constant but f_∞ will increase

⇒ Which of the following is an indirect method of generating FM?
Reactance BJT modulator
Armstrong modulation
Varactor diode modulation
Reactive FM modulator

⇒ Which of the following oscillator is not in FM?
Crystal oscillator
Hartley oscillator
Colpitts oscillator
All of the above