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Q1. | The IF amplifier in a superheterodyne receiver is |

A. | single-stage single-timed amplifier [Wrong Answer] |

B. | two stage of single tuned amplifier [Correct Answer] |

C. | double tuned amplifier [Wrong Answer] |

D. | class-C amplifier [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ The useful operational life of INSAT-IB (launched in 1983) is expected to end by

1992-93

1991-92

1989-90

1993-94

⇒ By the use of which of the following the PPM can be converted to PWM?

A stable multivibrator

Integrator

Monostable multivibrator

Bistable Multivibrator

⇒ Consider the following statements: The radar pulse must be flat topped to

- allow accurate range measurement
- allow good minimum range
- prevent frequency changes in magnetron
- make the returned echoes easier to distinguish from noise.

1, 2, 3, 4

1, 2, 3

1, 2

1, 3, 4

⇒ In FM, increased depth of modulation increases

modulation

modulation index

bandwidth

all of the above

⇒ To evaluate X = (A + B + 1.2) * (A + B - C) the sequence of operation is

+ + + - * =

* + + + - =

+ + - * + =

- + + + * =

⇒ In figure, I = 2A, then

5 V

3 V

2 V

1 V

⇒ An RLC series circuit has Q = 100 and ω

_{0}= 20 rad/sec. The bandwidth is

0.2 rad/sec

2 rad/sec

20 rad/sec

2000 rad/sec

⇒ A uniform wave have components

in the perpendicular direction E existing while H is zero

in the direction of propagation E existing while H is zero

E and H are zero in direction perpendicular to direction of propagation

E and H existing only in direction perpendicular to direction of propagation

⇒ The circuit shown depic

voltage series negative feedback

voltage shunt negative feedback

current series negative feedback

current shunt negative feedback

⇒ Who developed the concept of time varying electric field producing a magnetic field?

Gauss

Faraday

Hertz

Maxwell

⇒ When two

`ALU 1C 74181`

are cascadedthe carry out of first stage is connected to carry in of second stage

the carry in of first stage connected to carry in of second stage

the carry in of first stage is connected to carry out of second stage

the carry out of first stage is connected to carry out of second stage

⇒ In a modulator it is found that the amplitude spectrum consists a component at

*f*, the carrier frequency and one component each at

_{c}*f*-

_{c}*f*and

_{s}*f*+

_{c}*f*where

_{s}*f*is the modulating signal frequency. Then the modulator used is

_{s}AM

AM or MBFM with modulation index 0.5

FM

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⇒ The range of visible light is

300 to 2000 Å

200 - 4000 Å

4000 to 7700 Å

more than 10000 Å

⇒ In TV scanning sequence of lines is

left to right

right to left

left to right for odd fields and right to left for even field

left to right for even fields and right to left for odd field

⇒ In a 3 phase full converter, the firing angle is less than 60°. The instantaneous output voltage

will have positive part only

will have both positive and negative parts

may have both positive and negative parts

will have negative part if load is inductive

⇒ In a minimum function

the degree of numerator and denominator are equal

the degree of numerator and denominator are unequal

the degree of numerator is one more than degree of denominator

the degree of numerator is one less than degree of denominator

⇒ The enhancement type MOSFET is called a

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normally off MOSFET

P-type MOSFET

N-type MOSFET

⇒ Number of fundamental cut-sets of any graph will be

same as the number of twigs

same as the number of tree branches

same as the number of nodes

equal to one

⇒ The temperature coefficient of a thermistor

is positive

is negative

zero

may be positive or negative depending on its composition

⇒ The dynamic equalising circuit consists of a series combination of capacitor C and resistor R

_{C}across each thyristor. This resistance R

_{C}(along with parallel connected diode)

limits charging current

limits discharging current

limits both charging and discharging currents

none of the above

⇒ To couple a coaxial line to a parallel to wire line it is best to use a

slotted line

balun

directional coupler

quarter wave transformer

⇒ In the signal flow graph in the given figure the number of forward paths and pairs of non-touching loops are respecti

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3 and 2

4 and 2

2 and 4

⇒ The reverse saturation current in a semiconductor diode consists of

avalanche current

zener current

minority carrier current

minority carrier current and surface leakage current

⇒

**Assertion (A):** Demodulation of SSB and AM signals is exactly similar

**Reason (R):** The basic SSB demodulation device is product detector.

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

⇒ The probability density function of the envelope of narrow band noise is :

Uniform

Gaussian

Rayleigh

None

⇒ In the given figure the time taken by the wave to make one round tri

10

*ns*

20

*ns*

30

*ns*

40

*ns*

⇒ When iron rod is magnetised by the flowing through its coil, the polarities of its different points wil

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A is N, C is S

A is S, C is neutral, B is N

⇒ A balun transformer gives an impedance transformation of

0.167361111111111

0.0840277777777778

0.0444444444444444

0.0430555555555556

⇒ In colour television V and U signals are

same as I and Q signal

same as R - Y and B - Y

modified I and Q signal

modified R - Y and B - Y

⇒ Which of these are 16 bit microprocessors?

80286

MC68000

Z8000

All