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Q1. | Which one of the following is digital? |

A. | Pulse code modulation [Correct Answer] |

B. | Pulse width modulation [Wrong Answer] |

C. | Pulse frequency modulation [Wrong Answer] |

D. | Pulse position modulation [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 a piezoelectric crystal, application of a mechanical stress would produce

plastic deformation of the crystal

magnetic Dipoles in the crystal

electric polarization in the crystal

shift in the Fermi level

⇒ In a single phase full wave regulator feeding an R-L load, the power factor angle of load is θ. The range of control of firing angle a is

0 ≤ a ≤ p

θ ≤ a ≤ p

0 ≤ a ≤ (p - θ)

θ ≤ a ≤ (p + θ)

⇒ The strength of controlled voltage source depends on

value of current elsewhere in the circuit

value of voltage elsewhere in the circuit

value of current or voltage elsewhere in the circuit

none of the above

⇒ An audio signal of FM radio station is sampled at a rate of 15% above the Nyquist rate. Signal is sampled in 512 levels and bandwidth of the signal is 4 KHz. The minimum bandwidth required to transmit this signal will be

77 K bits/sec

92 K bits/sec

84.8 K bits/sec

82.8 K bits/sec

⇒ For a 16 bit computer the range of integer constants in C is

-32768 to + 32767

-32767 to + 32768

-65536 to + 65535

-65535 to + 65536

⇒

Match the following:

List I (Modes) | List II (Characteristic) | ||
---|---|---|---|

A. | Evanescent | 1. | Rectangular waveguide does not support |

B. | Dominant mode | 2. | No wave propagation |

C. | TM_{10} and TM_{01} | 3. | Lowest cut-off frequency |

A-1, B-2, C-3

A-2, B-3, C-1

A-1, B-3, C-2

A-2, B-1, C-3

⇒ The logic realized by the circuit shown in figure belo

F = A - C

F = A + C

F = B ⊙ C

F = B ⊕ C

⇒ If

*f*(

_{h}*t*) is the Hilbert transform of

*f*(

*t*), and

*f*(

*t*) is a real valued signal, the pre-envelope of

*f*(

*t*) is

*f*(

*t*) -

*jf*(

_{h}*t*)

*f*(

*t*) +

*jf*(

_{h}*t*)

*f*(

_{h}*t*) +

*jf*(

*t*)

*f*(

_{h}*t*) -

*jf*(

*t*)

⇒ The sum of two sine waves of different frequencies is a sine wave.

TRUE

FALSE

⇒ The Boolean expression (A + B) (A + C) (B + C) simplifies to

(A + B) C

(A + B) C

(A + B) C

none of these

⇒ A thyristor has a maximum allowable junction temperature of 120°C and the ambient temperature is 40°C. If thermal resistance is 1.6° C/W, the maximum allowable internal power dissipation is

20 W

50 W

92 W

128 W

⇒ Which of the following is a valid real variable in FORTRAN 77?

IT

GURGAON

42892

SUNDAY

⇒ The image frequency of a superheterodyne receiver is

created within the receiver itself

not rejected by IF tuned circuits

independent of the frequency of tuning

due to insufficient adjacent channel rejection

⇒

**Assertion (A):** Even if TTL gates and CMOS gates used in a realization have the same power supply of + 5 V, suitable circuit is needed to interconnect them

**Reason (R):** V_{OH}, V_{OL}, V_{IH} and V_{IL} of a TTL gave are respectively 2.4, 0.4, 2 and 0.8 V respectively. If supply voltage is + 5 V. V_{IL} and V_{IH} for CMOS gate for the supply voltage of + 5 V are 1.5 V and 3.5 V respectively.

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

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

A is true, R is false

A is false, R is true

⇒ The energy to cause thermionic emission is supplied by heating the cathode.

TRUE

FALSE

⇒ The signumm function written as [

*sgn(*] is defined as

*t*)*sgn(t)*= - 1 for

*t*< 0, = 0 for

*t*= 0 and = 1 for

*t*> 0

*sgn(t)*= 1 for

*t*< 0, = 0 for

*t*= 0 and = - 1 for

*t*> 0

*sgn(t)*= 0 for

*t*< 0, = 1 for

*t*= 0 and = 0 for

*t*> 0

*sgn(t)*= 0 for

*t*< 0, = 1 for

*t*

^{3}0

⇒ The probability giving distribution of electrons over a range of allowed energy levels is known as

Maxwell's Distribution

Fermi-Dirac Distribution

Richardson Dushman Distribution

none of the above

⇒ Logic hardware is available only in NAND and NOR.

TRUE

FALSE

⇒ In figure the voltage distribution on a vertical earthed antenna is represented

curve A

curve B

curve C

curve D

⇒ A two port network is symmetrical if

*z*

_{11}

*z*

_{12}-

*z*

_{12}

*z*

_{21}= 1

AD - BC = 1

*h*

_{11}

*h*

_{22}-

*h*

_{12}

*h*

_{41}= 1

*y*

_{11}

*y*

_{22}=

*y*

_{12}

*y*

_{21}= 1

⇒ Two resistances R

_{1}= 18.7 Ω. and R

_{2}= 3.624 Ω in series. The total resistance to the appropriate number of significant figures is

22.324 Ω

22.32 Ω

22.3 Ω

22 Ω

⇒ Which component is allowed to pass through it by a choke filter?

Dc

Ac

Both dc and ac

Only high frequency ac

⇒ The sum of 1110101

_{2}and 11011

_{2}in decimal form will be

65

75

85

95

⇒

Match the following:

List I (Instruction) | List II (Flag's getting affected) | ||
---|---|---|---|

A. | ORI | 1. | CY reset |

B. | DAA | 2. | CY reset and AC reset |

C. | PCHIL | 3. | S, Z, AC, P, CY flags affected |

4. | S, S, P are modified | ||

5. | No flags affected |

A-2, B-3, C-5

A-4, B-3, C-5

A-1, B-2, C-3

A-2, B-4, C-1

⇒ In Schottky TTL, a Schottky diode is used for

forming the gate

connecting the resistor

clamping of the basic collector junction

none of the above

⇒

**Assertion (A):** L[*e*^{-at}*f*(*t*)] = F(*s* + *a*)

**Reason (R):** In use of Laplace transform method, initial conditions may be neglected.

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

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

A is true, R is false

A is false, R is true

⇒ If the characteristic equation of a closed loop system is

*s*

^{2}+ 2

*s*+ 2, then the system is :

over damped

critically damped

under damped

undamped

⇒ The resistance of a standard conductor.

increases with frequency

same for

*ac*and

*dc*

increases with frequency

increases as square root of frequency

⇒ Which of the following is open loop system?

Wind screen wiper

Aqualing

Respiratory system of animal

System for controlling antirocket missiles

⇒ A vertical wire of 1 meter length carries a current of 1 A at 10 MHz. The total radiated power is nearly

0.13 W

0.88 W

7.3 W

73 W