Question is ⇒ Which of the following is present in both TRF receiver and superheterodyne receiver?, Options are ⇒ (A) Detector, (B) Mixer, (C) IF amplifier, (D) Local oscillator, (E) , Leave your comments or Download question paper.

Question is ⇒ Which of the following is present in both TRF receiver and superheterodyne receiver?, Options are ⇒ (A) Detector, (B) Mixer, (C) IF amplifier, (D) Local oscillator, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Which of the following is present in both TRF receiver and superheterodyne receiver?
A.	Detector [Correct Answer]
B.	Mixer [Wrong Answer]
C.	IF amplifier [Wrong Answer]
D.	Local oscillator [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 hexadecimal number system is
widely used in analyzing and programming microprocessors
an obsolete system no more in use
used in calculators only
none of the above

⇒ In 8085, the pins for SID and SOD are
4 and 5 respectively
5 and 4 respectively
3 and 4 respectively
4 and 3 respectively

⇒ The amplifier circuit shown below uses a silicon transistor. The capacitors C_c and C_E can be assumed to be short at signal frequency and the effect of output resistance r₀ can be ignored. If C_E is disconnected from the circuit, which one of the following statements is T
The input resistance R_i increases and the magnitude of voltage gain A_v decreases
The input resistance R_i decreases and the magnitude of voltage gain A_v decreases
Both input resistance R_i and the magnitude of voltage gain A_v decrease
Both input resistance R_i and the magnitude of voltage gain A_v increase

⇒ If the minimum range of a radar is to be doubled, the peak power has to be increased by a factor of
2
4
8
16

⇒ CE mode input V-I characteristic can be shown by a plot of
V_BE versus i_B for constant values of V_CE
V_CB versus i_C for constant values of I_E
V_CE versus i_E for constant values of V_EB
V_CE versus i_E for constant values of V_CE

⇒ In pulse transmitter the ratio of time on to time off is called
efficiency
duty cycle
base
bandwidth

⇒ For the amplifier circuit of figure, the h parameters of transistor are h_ib = 25 Ω, h_fb = 0.999, h_ob = 10^-6 Ω. The voltage gai
0.999
1.98
20
400

⇒ Which one of the following is used to change data from spatial code to temporal code?
Shift register
Counter
A/D converters
Combinational circuits

⇒ Which of the following is a self-complementing code?
8421 code
Excess 3 codes
Pure binary code
Gray code

⇒ The peak factor is the ratio of
peak and rms values
peak and average values
rms and average values
none of the above

⇒ ROC of sequence x[n] = (3)ⁿ ∪[n] + (4)ⁿ ∪[- n - 1]
|z| > 4
3 < |z| < 4
|z| < 4
|z| > 3

⇒ 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

⇒

Assertion (A): If an electron having charge e is revolving in an orbit of radius R and with angular velocity ω, the magnetic dipole moment of orbit is 0.5 eωR².

Reason (R): Orbital angular momentum and magnetic dipole moment are always equal.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true

⇒

Match the following:

	List I		List II
A.	h_ie	1.	49
B.	h_re	2.	25 x 10^-6siemens
C.	h_fe	3.	2.4 x 10^-4
D.	h_oe	4.	1000 ohms

A-1, B-2, C-3, D-4
A-4, B-3, C-2, D-1
A-3, B-4, C-1, D-2
A-4, B-3, C-1, D-2

⇒ Following is a reason of distortion in communication system
external interference
random variations
insufficient Channel Bandwidth
all

⇒ If temperature increases by about 50°, the resistance of thermistor changes to
half of its initial value
twice of its initial value
eight times of its initial value
one eight of its initial value

⇒ With regard to a transmission line, which of the following statements is correct?
Any impedance repeats itself every 1/4 on the Smith chart.
The S.W.R. = 2 circle and the magnitude of reflection coefficient = 0.5 circle coincide on the Smith chart.
At any point on a transmission line, the current reflection coefficient is the reciprocal of the voltage reflection coefficient.
Matching eliminates the reflected wave between the source and the matching device location.

⇒ When R and C are connected in parallel, phase angle of Y is positive.
TRUE
FALSE

⇒ Which of the following devices should be used for accurate measurement of a low dc voltage?
Small range moving coil voltmeter
Dc potentiometer
Small range thermocouple voltmeter
Hot wire instrument

⇒

Assertion (A): When excited by a unit step voltage, an inductor behaves as open circuit at t = 0.

Reason (R): Inductance has the property of inertia.

Both A and R are true and R is correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true

⇒ In sinusoidal PWM for inverters the width of different pulses are not the same.
TRUE
FALSE

⇒ P flag is for parity.
TRUE
FALSE

⇒ In a positive edge triggered JK flip flop, J = 1, K = 0 and clock pulse is rising Q will
be 0
be 1
show no change
toggle

⇒ In an ideal junction transistor the impurity concentration in emitter (E ), base (B) and collector (C) is such that
E > B > C
B > C > E
C > E > B
C = E = B

⇒ The given figure shows log magnitude versus ω plots of a system for different values of gain. For this sy
curve 1 shows highest gain margin and curve 2 shows poorest gain margin
gain margins shown by the three curves are equal
curve 1 shows poorest gain margin and curve 3 shows highest gain margin
curve 3 shows poorest gain margin while curve 1 shows highest gain margin

⇒ A (0.75 - j50) ohm load is connected to a coaxial transmission line of Z₀ = 75 ohms at a frequency of 10 GHz Which of the following will be the best method of matching?
Connecting an inductance at the end
Connecting a short circuited stub at the load
Connecting a capacitance at some distance from the load
Connecting a short circuited stub at some specified distance from the load

⇒ If the iron core of a coil is removed so that it becomes an air cored coil, its inductance
will increase
will decrease
will remain the same
may increase or decrease

⇒ A lossless transmission line with air dielectric is 6 m long. what is the phase constant?
1p rad/m
2p rad/m
0.2p rad/m
0.1p rad/m

⇒ The circuit in figure(1) is replaced by that in figure(2). It remains same R₀ wil
zero
R
2R
4R

⇒ For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the value of propagation constant P will be
15.9 radians/km
31.8 radians/km
63.6 radians/km
105.4 radians/km