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Q1. | Most popular IF for receivers tuning to 540 to 1650 kHz is |

A. | 433 kHz [Wrong Answer] |

B. | 455 kHz [Correct Answer] |

C. | 545 kHz [Wrong Answer] |

D. | 555 kHz [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 modulation index of an FM is changed from 0 to 1. How does the transmitted power change?

Gets halved

Gets doubled

Gets increased by 50 percent

Remains unchanged

⇒ A step down cycloconverter has an input frequency

*f*. If it uses natural commutation, the output frequency

must be a sub-multiple of input frequency

can be any frequency

must be an even sub-multiple of input frequency

must be an odd sub-multiple of input frequency

⇒ The useful magnetic flux obtainable from any closed surface is

unity

constant

both (a) and (b)

none of the above

⇒ The phase velocity

*v*in a transmission line is

LC

C/L

L/C

1/LC

⇒ I-PD controlled system has

I, P and D actions in forward path

I, P and D actions in feedback path

I action in forward path but P and D action in feedback path

I action in feedback path but P and D actioins in forward path

⇒ Consider the following statements: In a differential amplifier using JFET, the differential output offset is due to

- mismatch between FET parameters
- difference in values of resistances used in circuit
- variation in supply voltage.

1 and 2

1, 2, 3

2, 3

1, 3

⇒ The coding system generally used in digital telemetry is

PPM (Pulse position modulation)

PAM (Pulse amplitude modulation)

PCM (Pulse code modulation)

PDM (Pulse duration modulation)

⇒ For an RC admittance function

all poles and zeros are simple

all poles and zeros are simple and lie on negative real axis

all poles and zeros lie on imaginary axis

all poles and zeros lie on positive real axis

⇒ 11011 in gray code = __________ .

10010

_{2}

11111

_{2}

11100

_{2}

10001

_{2}

⇒ Transient current in a loss free LC circuit when excited from an ac source is an __________ sine wave.

undamped

over damped

under damped

critically damped

⇒ In 2 out of 5 code, decimal number 8 is

11000

10100

11000

1010

⇒ Which of the following is abnormal variation in ionosphere?

Diurnal variation

Seasonal variation

Ionospheric storms

None of the above

⇒ In what range should Re(

*s*) remains so that Laplace transform of the function

*e*

^{(a + 2)t + 5}exists?

Re(

*s*) >

*a*+ 2

Re(

*s*) >

*a*+ 7

Re(

*s*) <

*a*

Re(

*s*) >

*a*+ 5

⇒ If

*f*=0

X

_{L}= 0 and X

_{C}= 0

X

_{L}= ∞, X

_{C}= ∞

X

_{L}= 0 and X

_{C}= ∞

X

_{L}= ∞ and X

_{C}= 0

⇒ If X = 1 in the logic equation [X + Z { Y + (Z + X Y)}] { X + Z (X + Y)} = 1, then

Y = Z

Y = Z

Z = 1

Z = 0

⇒ The synthesis of minimum function was suggested by

O'Brune

R. Richards

Bott and Duffin

none of the above

⇒ Some sources of TV programs are

- TV camera
- Telecine
- VTR
- External signal

1, 2, 3 and 4

1, 2, 3

1 and 3

1 2 and 4

⇒ The magnitude response of a normalised Butterworth low pass filter is

linear starting with value of unity at zero frequency and 0.707 at cut off frequency

non linear all through but with values of unity at zero frequency and 0.707 at cut off frequency

linear upto cut off frequency and nonlinear thereafter

nonlinear upto cut off frequency and linear thereafter

⇒ The sinusoidally time varying vector fi

elliptically polarized

circularly polarized

linearly polarized

unpolarized

⇒ When Schrodinger equation is applied to the motion of electron in the field of protons, the physically acceptable solutions for the wave function exist for quantum number which are

2

3

4

5

⇒ Read the following statements as regards register pairs in microprocessor 8085

- B represents B, C pair with B as high order register and C as low order register.
- D represents D, E pair with D as high order register and E as low order register.
- H represents H, L pair with H as high order register and L as low order register.

All

1 and 3

1 and 2

2 and 3 only

⇒ The antenna current of an AM transmitter is 8 A, when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by a single sine wave. Determine the antenna current when the percent of modulation changes to 0.8

9.19 A

9.91 A

10.56 A

8.61 A

⇒ The number of memory locations in which 14 address bits can access is

1024

2048

4096

16384

⇒ The sum of positive real functions

is a positive real function

may be a positive real function or not

can not be a positive real function

either (b) or (c)

⇒ Mobility of electrons and holes are equal.

TRUE

FALSE

⇒ The term 'Poisson's ratio' is connected with

strain gauge

LVDT

Bourden tube

capacitance transducer

⇒ A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1 Ω/m, if the line is distortion less, the attenuation constant (in Np/m) is

500

5

0.014

0.002

⇒ If the reverse voltage across a

*p*-

*n*junction is increased three times, the junction capacitance

will decrease

will increase

will decrease by an approximate factor of about 2

will increase by an approximate factor of about 2

⇒ The skin depth at 1000 MHz as compared to that at 500 MHz is

2

12

0.707

0.5

⇒ A line has an attenuation of 0.054 Np/m. The attenuation in decibels is

4.7 dB/m

0.47 dB/m

0.54 dB/m

5.4 dB/m