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Q1. | Frequency shift keying is used mostly in |

A. | telegraphy [Correct Answer] |

B. | telephony [Wrong Answer] |

C. | satellite communication [Wrong Answer] |

D. | radio transmission [Wrong Answer] |

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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 :**

⇒ If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative number the result is

a larger floating point number

a smaller floating point number

either (a) or (b) depending on the actual number

a negative floating point number

⇒ Start and stop bit do not contain any information but are used in serial communication for

error correction

error detection

synchronization

slowing down the communication

⇒ The minimum decimal equivalent of the number 11C0 is

183

194

268

269

⇒ In colour TV system the colour sub carrier frequency is 4.43 MHz.

TRUE

FALSE

⇒ A

*Q*meter uses the principle of

variation of self inductance

variation of mutual inductance

series resonance

none of the above

⇒ The pointer of an indicating instrument should be

very light

very heavy

neither heavy nor light

heavy

⇒ For static electric and magnetic fields in an homogenous source-free medium, which of the following represents the correct form of Maxwell's equations?

Δ.E = 0

Δ.E = 0

Δ x E = 0

Δ x E = 0

⇒ A bypass capacitor produces

dc ground

ac ground

both dc and ac ground

none of the above

⇒ Calculate the stability factor and change in I

_{c}from 25°C to 100°C for, β = 50, R

_{B}/R

_{E}= 250, ΔI

_{CO}= 19.9

*n*A for emitter bias configuration

42.553, 0.85 μF

40.91, 0.58 μF

38.53, 0.85 μF

41.10, 0.39 μF

⇒ Which of these has a layer of intrinsic semiconductor?

Zener diode

PIN diode

Photo diode

Schottky diode

⇒ Which has the highest power dissipation per gate?

ECL

TTL

CMOS

PMOS

⇒ The output of basic DTL configuration is

low when one of the input is high

low when all inputs are high

high when all inputs are high

high when all inputs are low

⇒ For real and odd signals, the Fourier series coefficient

*a*is

_{n}purely imaginary

purely real and even

purely imaginary and odd

purely real and odd

⇒ An RLC series circuit is excited by an ac voltage

*v*= 1 sin

*t*. If L = 10 H, C = 0.1 F peak value of voltage across R is

0.707 V

1 V

1.44 V

indeterminate as value of R is not given

⇒ The most commonly used semiconductor material is

silicon

germanium

mixture of silicon and germanium

none of the above

⇒ Armstrong FM transmitter uses

LC oscillator

crystal oscillator

RC oscillator

either (a) or (c)

⇒ For insulators the energy gap is of the order of

0.1 eV

0.7 eV

1.1 eV to 1.2 eV

5 to 15 eV

⇒ When a power diode is conducting, the voltage drop across it is about

I V

5 V

20 V

50 V

⇒ The dynamic resistance of a forward biased

*p*-

*n*diode

varies inversely with current

varies directly with current

is constant

is either constant or varies directly with current

⇒ In FORTRAN 77 FLOAT (-28) gives the value

28

-28

-28

none of the above

⇒ A wire strain gauge has a gauge factor of 2, resistance of 125 Ω and length 1 m. If length of wire changes by .005 m, change in resistance will be

0.25 Ω

0.5 Ω

1.25 Ω

2.5 Ω

⇒ Which of the following binary product is incorrect?

1100 x 1010 = 1111000

1.01 x 10.1 = 11.001

1100110 x 1000 = 1100110000

None of the above

⇒ (22)

_{4}+ (101)

_{3}- (20)

_{5}= (

*x*)

_{4}+ (4)

_{x+1}where

*x*> 4. The value of

*x*is

6

4

12

8

⇒ A divide by 78 counters can be realized by using

six mod-13 counters

thirteen mod-6 counters

one mod 13 counter followed by one mod-6 counter

thirteen mod-13 counters

⇒ A series resonant circuit is capacitive at

*f*= 150 Hz. The circuit will be inductive somewhere at

*f*greater than 150 Hz

*f*less than 150 Hz

*f*equal to 150 Hz by increasing the value of the resistance

none of the above

⇒ The circuit in figure will act as ideal current source with respect to terminals A and B when frequenc

0

1 rad/sec

4 rad/sec

16 rad/sec

⇒ If number of information bits is 4, the parity bits in Hamming code are located at bit positions __________ from the LSB.

1, 2, 5

1, 2, 4

1, 2, 3

1, 2

⇒ Identify which of the following is not a tree of the graph shown in fi

*bcgh*

*defg*

*abfg*

*aegh*

⇒ The gain margin for a stable system

has a positive decibel value

has a negative decibel value

has a large negative decibel value

none of the above

⇒ In a number system with radix

*r*, the decimal value of 110 is equal to 4

*r*. The decimal values of 111 and

*r*respective are equal to

20, 5

16, 4

13, 3

8, 2