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Q1. | A 200 Hz sound wave is to be transmitted by a 1000 kHz radio wave using frequency modulation. The instantaneous frequency variation will be |

A. | 100 times a second [Wrong Answer] |

B. | 200 times a second [Correct Answer] |

C. | 400 times a second [Wrong Answer] |

D. | 1000 times a second [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 current flowing through a pure capacitor is called displacement current.

TRUE

FALSE

⇒ Which one is correct option about ROC?

ROC does not contain any pole

ROC of finite duration sequence is entire plane expect

*z*= 0,

*z*= ∞

*a*and

*b*

only

*a*

⇒ With respect to transmission parameters, which one of the following is correct?

A and B are dimensionless

B and C are dimensionless

A and D are dimensionless

B and D are dimensionless

⇒ A three stage telephone switching structure is to have 128 input and 128 output terminals. It has been found that at peak time the utilization probability is 0.1. The number of intermediate links required for non-blocking configuration is 15. If the actual number of intermediate links is 5, the probability of blocking of call is

0.01

0.005

0.002

0.001

⇒ Which of the following

*cannot*provide as much time interval accuracy as the oscilloscope but can capture and display eight or more signals simultaneously, something that scopes cannot do?

Logic analyzer

Digital oscilloscope

Frequency analyzer

Wave analyzer

⇒ In a uniform plane wave E and H are related by

E/H = 1

E/H = ε/μ

E/H = μ/ε

none of the above

⇒ A casual LTI system is described by the difference equat

|a| = 2 |β| < 2

|a| > 2 |β| > 2

|a| < 2 any value of β

|β| < 2, any value of a

⇒ Which of the following measurements using a dc potentiometer do not require standardisation of potentiometer?

Measurement of unknown voltage

Measurement of resistance

Measurement of unknown current

Calibration of voltmeter

⇒ A/D parallel converter is also called flash converter.

TRUE

FALSE

⇒ The image frequency of a superheterodyne receiver is

independent of the frequency at which the receiver is tuned

always outside the operating range of the receiver

typical to FM receivers only

not rejected by the IF tuned circuits

⇒ Armstrong F.M. transmitter performs frequency multiplication in stages

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⇒ If a = 0.995, I

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⇒ In a 3 phase semiconverter, the output voltage becomes discontinuous for

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firing angle > 60°

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firing angle > 120°

⇒ If the ratio of ac to dc load impedance of a diode detector is low, the result will be

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poor AF response

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⇒ A circular waveguide carries TE

_{11}mode whole radial electric field is give

10 cm

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2 p cm

8 cm

⇒ The more negative gate voltage, the conductive channel becomes

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⇒ Fourier transform pair are

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autocorrelation and convoloution

convolution and power spectral density

autocorrelation and energy

⇒

Match the following:

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

A. | Silicon | 1. | Donor Impurity |

B. | Antimony | 2. | Acceptor Impurity |

C. | Gallium | 3. | Most Commonly used semiconductor material |

D. | Germanium | 4. | Atomic number 32 |

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

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

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

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

⇒ Which of these has poor overload capacity?

PMMC instrument

Hot wire instrument

Dynamometer instrument

Both (a) and (c)

⇒

**Assertion (A):** A transistor has lower voltage drop during conduction as compared to thyristor

**Reason (R):** Transistors are manufactured in very high voltage and current ratings.

Both A and R are correct and R is correct explanation of A

Both A and R correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ In oscillator circuits the energy feedback to its input terminal from output is

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90° out of phase with the input signal

180° out of phase with the input signal

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standard deviation

expectation

chebyshev inequality

⇒ A 4 bit down counter can count from

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1111 to 0000

000 to 111

111 to 000

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8 bit parallel adder

16 bit parallel adder

none of the above

⇒ A network has two sources of different frequencies. The only method of analysis which can be used to find current and voltages of different branches is the use of

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⇒ Which op-amp circuit uses a capacitor in series with input and resistance in feedback path?

Differentiating amplifier

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Logarithmic amplifier

None of the above

⇒ A discrete LTI system is non-casual if its impulse response is

*a*

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^{n}*n*- 2)

*a*

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^{n-2}*n*)

*a*

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*a*

*∪(*

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⇒ Virtual height of an ionospheric layer is always greater than its actual height.

TRUE

FALSE