Question is ⇒ IF amplifiers for radio receivers are often tuned to, Options are ⇒ (A) 456 Hz, (B) 456 kHz, (C) 3456 MHz, (D) 456 GHz, (E) , Leave your comments or Download question paper.

Question is ⇒ IF amplifiers for radio receivers are often tuned to, Options are ⇒ (A) 456 Hz, (B) 456 kHz, (C) 3456 MHz, (D) 456 GHz, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	IF amplifiers for radio receivers are often tuned to
A.	456 Hz [Wrong Answer]
B.	456 kHz [Correct Answer]
C.	3456 MHz [Wrong Answer]
D.	456 GHz [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 :

⇒ In following circuit, steady state is reached with S open, S is closed at t = 0, the current I at t = 0⁺ is give
9 Ω
6 Ω
7 Ω
10 Ω

⇒ In a single-stage RC coupled common emitter amplifier, the phase shift at the lower 3 dB frequency is
zero
135°
180°
225°

⇒ While keeping the down-link frequency constant, the diameter of a satellite antenna is reduced by half. To offer the same EIRP over the increased coverage area, the RF output power has to be increases by a factor of
2
4
8
16

⇒ If the average power of radar transmitters is 2 kW and the peak power of the transmitter is 1000 kW, what will be the duty cycle?
0.002
0.02
0.001
0.01

⇒ A single phase energy meter operates on induction principle.
TRUE
FALSE

⇒ In a circuit the value of resistor is made four times. The noise voltage generated by this resistance will
be doubled
be increased four times
remain the same
become half

⇒ A 1000 kHz carrier is simultaneously modulated by 300 Hz and 2 kHz audio sine wave. Which of the following frequencies will not be present in the output?
998 kHz
999.7 kHz
1000.3 kHz
700 kHz

⇒ The inputs to a 4 channel MUX have the following bandwidths. Channel 1-50 Hz, channel 2-200 Hz. Channel 3-75 Hz. Channel 4-90 Hz. The theoretical minimum sampling rate of the MUX is
200 Hz
400 Hz
415 Hz
1600 Hz

⇒ The forbidden energy gap for germanium is
0.12 eV
0.32 eV
0.72 eV
0.92 eV

⇒ When a function Z(s) having a pole at infinity is realized, we get
a capacitance in series
a resistance in series
an inductance in series
a resistance or inductance in series

⇒ The logic circuit given below converts a binary code y₁ y₂, y₃
Excess - 3 code
Gray code
BCD code
Hamming

⇒ Surface impedance at high frequencies is a consideration for
ferrites
semiconductors
good conductors
dielectrics

⇒ In a typical microcomputer data transfer takes place between
μP and memory
μP and I/O devices
memory and I/O devices
all of the above

⇒ An electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis is
synchro control transformer
LVDT
stepper motor
tacho generator

⇒ A first order system will never be able to give a __________ response

band stop
band pass
all pass

Choose the correct option
1, 2, 3 true
1 and 3 true, 2 false
1, 2 are true 3 is false
1, 2 are false, 3 is true

⇒ In a clocked latch, clock drives
R NAND gate
S NAND gate
both R and S NAND gates
either R or S NAND gates

⇒ Out of the three transforms viz. Z-transform, Laplace transform and Fourier transform
all three are used in continuous time domain
all three are used in both continuous time domain and discrete time domain
Z transform is used in continuous time domain while Laplace and Fourier transforms are used in discrete time domain
Z transform is used is discrete time domain while Laplace and Fourier transforms are used in continuous time domain

⇒ To prevent overloading in the last IF amplifier one should use
variable sensitivity
squelch
double conversion
variable selectivity

⇒ Some words like READ, WRITE, STOP etc. cannot be used as variable names in Fortran 77.
TRUE
FALSE

⇒ The overall noise temperature T_e, absolute temperature T and noise figure F are related as
T_e = T(F - 1)
T_e = F(T - 1)
T = T_e(F - 1)
T_e = (T)(F)

⇒ Superheterodyne receiver can be used in
AM
FM
SSB
All of the above

⇒ In a modulator it is found that the amplitude spectrum consists a component at f_c, the carrier frequency and one component each at f_c - f_s and f_c + f_s where f_s is the modulating signal frequency. Then the modulator used is
AM
AM or MBFM with modulation index 0.5
FM
PAM

⇒ An antenna is synonymous to a
generator
transformer
regulator
reflector

⇒ The frequencies in ultra high frequency range are propagated by means of __________ waves
surface
ground
sky
space

⇒ Electric dipole moment is expressed in debye unit.
TRUE
FALSE

⇒ A transistor has two p-n junctions. The batteries should be connected such that
both junctions are forward biased
both junctions are reverse biased
one junction is forward biased and the other is reverse biased
none of the above

⇒

Assertion (A): Laplace transform of impulse function is equal to area under the impulse.

Reason (R): An impulse function whose area is unity is called unit impulse function.

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

⇒

Assertion (A): An artificial transmission line can be used as a pulse generator.

Reason (R): A pulse function is used very frequently in network analysis.

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

⇒ Secondary emission occurs in
diode
triode
tetrode
pentode

⇒

Assertion (A): Chopper always requires forced commutation

Reason (R): Morgan chopper uses a saturable reactor.

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