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Q1. | The subcarrier frequency for transmission of colour difference signals in TV systems in India is |

A. | 9.47 MHz [Wrong Answer] |

B. | 4.43 MHz [Wrong Answer] |

C. | 2.06 MHZ [Wrong Answer] |

D. | 1.3 MHz [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 :**

⇒ Which liquid crystal is used for LCD display?

Mercury

Pneumatic fluid

Aqua regia

Liquid boron

⇒ Assuming that flip-flops are in reset condition initially, the count sequence observed at Q

_{A}in the circuit show

0010111...

0001011...

0101111...

0110100...

⇒ Which of the following statement number is not valid in Basic

12

521

662512

99999

⇒ 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

⇒ If X = 2.5 and Y = 2.5, which of the following expressions would give the result as 5/7?

X + 2.5 / Y + 3.0

(X + 2.5) / Y + 4.5

(X + 2.5) / (Y + 4.5)

(X + 2.5) / Y + 3.5

⇒ The figures shows the symbo

p channel depletion MOSFET

p channel enhancement MOSFET

complementary MOSFET

p channel JFET

⇒ The bandwidth required for amplitude modulation is

half the frequency of modulating signal

equal to the frequency of modulating signal

twice the frequency of modulating signal

four times the frequency of modulating signal

⇒ Assuming V

_{CE sat}= 0.2 V and β = 50, the minimum base current (I

_{B}) required to drive the transistor in the given figure to saturatio

56 μA

140 μA

60 μA

3 μA

⇒ For an RC admittance function Y,

Y(∞) < Y(0)

Y(0) < Y(∞)

Y (∞) may be lesser or greater than Y(0)

Y(∞) = Y(0)

⇒ The most commonly used semiconductor material is

silicon

germanium

mixture of silicon and germanium

none of the above

⇒ 74HCT00 series is

NAND IC

interface between TTL and CMOS

inverting IC

NOR IC

⇒ The phase angle corresponding to λ/4 in a standing-wave pattern is

30°

90°

135°

180°

⇒ Which one of the following effects is used in measuring power?

Seeback

Ferrari

Induction

Hall

⇒ In a series R-L circuit when excited by a 1 volt battery the current is 1 -

*e*

^{-t}. If it is excited by a source 2 sin

*t*, the current will be

2 sin (

*t*- 45°) +

*e*

^{-t}

2 sin (

*t*+ 45°) +

*e*

^{-t}

sin (

*t*- 45°) +

*e*

^{-t}

sin (

*t*+ 45°) +

*e*

^{-t}

⇒ For the K map of the given figure the simplified Boolean expressio

A + BC

A + BC

A + B C

A + B C

⇒

Match the following:

List I (Logic family) | List II (Characteristic of logic family) | ||
---|---|---|---|

A. | TTL | 1. | Maximum power Consumption |

B. | ECL | 2. | Highest Packing Density |

C. | NMOS | 3. | Least Power Consumption |

D. | CMOS | 4. | Saturated Logic |

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

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

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

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

⇒ 2's complement of binary number 0101 is

1011

1111

1101

1110

⇒ Four MSI TTL 4-bit ripple counters are cascaded to form a 16-bit binary counter. Its propagation delay is about __________ nanoseconds.

70

140

210

280

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | Digital counter | 1. | Measurement of harmonics |

B. | Schering Bridge | 2. | Measurement of frequency |

C. | Meggar | 3. | Measurement of loss angle of dielectric |

D. | Spectrum analyser | 4. | Measurement of insulation resistance |

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

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

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

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

⇒ For a reactance function H(

*s*)

Re [H(

*j*ω)] is positive for ω ≥ 0

Re [H(

*j*ω)] is zero for ω ≥ 0

Re [H(

*j*ω)] is positive or zero for ω ≥ 0

Re [H(

*j*ω)] is zero or negative for ω ≥ 0

⇒ The conductivity of an intrinsic semiconductor is

generally less than that of a doped semiconductor

given by σ

_{1}=

*en*

_{i}(μ

_{n}- μ

_{p})

given by σ

_{1}=

*en*

_{i}(μ

_{p}+ μ

_{n})

given by σ

_{1}=

*n*

_{i}(μ

_{n}+ μ

_{p})

⇒ The electric field in a TWT due to applied signal

is directed along the helix axis

is directed radially from helix axis

is inclined to the helix axis by about 60°

is inclined to the helix axis by about 45°

⇒ In a backward wave oscillator the efficiency

is much higher than in TWT

is much lower than in TWT

is almost the same as in TWT

either (a) or (b)

⇒ The emitter bias largely depends on

gain

signal input

I

_{E}

none of the above

⇒ The bandwidth required for amplitude modulation is

half the frequency of modulating signal

equal to the frequency of modulating signal

twice the frequency of modulating signal

four times the frequency of modulating signal

⇒ In a two terminals network the O.C. voltage measured at the given terminals is 100 V and s.c., currents at the same terminals 5 A. If a load of 80 Ω resistance is connected at the terminals, load current is

0.0416666666666667

1.25 A

0.25

6.25 A

⇒ Which one of following is correct condition to check the stability of sysytem in terms of impulse response?

Σ(

*x*(

*n*)) < ∞

Σ

*x*(

*n*) < 0

Σ

*x*(

*n*) = 0

Σ

*x*(

*n*) = ∞

⇒ Decimal 17 in octal system is represented by

888

111

21

27

⇒ Wide banding technique is employed in the

video amplifier of a TV receiver

IF amplifier of an FM receiver

RF amplifier of an AM receiver

input section of a communication receiver

⇒ A device has two resistances 300 Ω and 200 Ω respectively. The noise voltages due to these two resistance calculated separately are 5.38 μV and 4.38 μV respectively. When both of them are used together, the noise voltage will be

9.76 V

1 μV

23.56 μV

6.94 μV