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Q1. | As compared to tuned radio frequency receivers which of the following is the advantage of using superheterodyne receivers? |

A. | High gain and better sensitivity [Correct Answer] |

B. | Better selectivity at high frequencies [Wrong Answer] |

C. | Stability [Wrong Answer] |

D. | Noise suppression [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ In which of the following logical group instructions of 8085 is the addressing mode 'immediate'?

`ANA `*r*

`ANA M`

`ANI data`

`XRA `*r*

⇒ Capacitance hats are installed on low frequency antenna is

increase the electrical length

reduce the electrical length

protect against lightening

protect against corona effects

⇒ A parity detector can detect

single error only

single error or odd number of errors

two errors

single or two errors

⇒ A magnetic circuit has an iron length of 20 cm and air gap length 0.1 cm. If μ

_{r}= 200 then

mmf for iron and air gap are equal

mmf for iron is much less than that for air gap

mmf for iron is much more than that for air gap

either (a) or (c)

⇒ An electrically neutral semiconductor has

no free charges

no majority carriers

no minority carriers

equal number of positive and negative charges

⇒ Shannon's Law relates

antenna gain to frequency

noise power to bandwidth

information-carrying capacity to S/N ratio

transmission losses to noise

⇒ If a RAM has 34 bits in its MAR and 16 bits its MAR, then its capacity will be

32 GB

16 GB

32 MB

16 MB

⇒ The Nyquist plot of a stable, transfer function

*G*(

*s*) is shown in the figure. We are interested in the stability of the closed loop system in the feedback configuration sh

G(

*s*) is an all-pass filter

G(

*s*) has a zero in the right-half plane

G(

*s*) is the impedance of a passive network

G(

*s*) is marginally stable

⇒ E

_{G}for silicon is 1.12 eV and that for germanium is 0.72 eV. Therefore, it can be concluded that

the conductivity of silicon will be less than that of germanium at room temperature

the conductivity of silicon will be more than that of germanium at room temperature

the conductivity of two will be same at 60°C

the conductivity of two will be same at 100°C

⇒ A number given in binary as 0101.01 is to be scaled up 4 times. The scaled up binary is

10101

1.0101

404.04

10.101

⇒ The equivalent inductance measured between the terminals 1 and 2 for the circuit shown in the figur

L

_{1}+ L

_{2}+ M

L

_{1}+ L

_{2}- M

L

_{1}+ L

_{2}+ 2M

L

_{1}+ L

_{2}- 2M

⇒ Which of these commutation methods is used in AC-DC converters?

Class A

Class C

Class D

Class F

⇒ Current through a charging capacitor exhibits

an exponential growth function

an exponential decay function

a step decay function

a linear decay function

⇒ The pole of a reactive function

lie on

*j*ω axis only

lie on negative real axis only

may lie anywhere on

*s*plane

lie on

*j*ω axis or on negative real axis

⇒ A typical signal strength received from a geosynchronous communication satellite is of the order of a few

milliwatts

kilowatts

picowatts

watts

⇒ For satellite communication, the frequency should be

equal to the critical frequency

more than the critical frequency

less than the critical frequency

none of these

⇒ The generally used value of EHV supply in TV receivers is

1 kV per diagonal cm

1 kV per diagonal inch

0.5 kV per diagonal cm

0, 5 kV per diagonal inch

⇒ The ASCII code is for information interchange by a binary code for

alphabet only

number only

alpha-numeric and other common symbols

none of these

⇒ The loops ' for , 'while' , 'do-while' are used in

Fortran 77

Pascal

C

none of the above

⇒ The portion of the atmosphere closest to ground is called ionosphere.

TRUE

FALSE

⇒ If load impedance Z

_{L}>> Z

_{0}, then

Z

_{0}= Z

_{L}(VSWR)

Z

_{L}= Z

_{0}(VSWR)

Z

_{L}= Z

_{0}(VSWR - 1)

Z

_{L}= Z

_{0}VSWR

⇒ A dependent source

may be a current source or voltage source

is neither a current source nor a voltage source

is always a voltage source

is always a current source

⇒ In a centre tap full wave rectifier, 50 V is the peak voltage between the centre tap and one of the ends of the secondary. The maximum voltage across the reverse biased diode will be

100 V

72 V

50 V

38 V

⇒ What are the contents of the accumulator after the RIC has been executed?

40 H

41 H

42 H

43 D

⇒ The name modem is a contraction of terms modulator demodulator.

TRUE

FALSE

⇒ If an admittance Y(

*s*) has a term K

*s*, the realization would give

an inductance of value K

a resistance of value K

a capacitance of value K

either (a) or(c)

⇒ Which of the following is NOT associated with a p-n junction?

Junction capacitance

Charge Storage Capacitance

Depletion Capacitance

Channel Length Modulation

⇒ The interface chip for 8086 and 16 bit ADC is

8259

8255

8253

8251

⇒ If

*f*is more than

*f*

_{unity}the gain of op-amp becomes less than 1.

TRUE

FALSE

⇒ A pole zero pattern of a certain filter is shown in figure. This filter mus

LPF

BFP

HPF

APF