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Q1. | Multiplex techniques are used for |

A. | low density communications [Wrong Answer] |

B. | low density point-to-point communications [Wrong Answer] |

C. | high-density point-to-point communications [Correct Answer] |

D. | all of the above [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ Consider the following expressions in J

42, 40, 42 respectively

42, 42, 42 respectively

40, 42, 42 respectively

40, 40, 42 respectively

⇒ The circuit show

voltage series feedback amplifier

transconductance amplifier

transresistance amplifier with open circuit mutual resistance R

_{F}

transresistance amplifier with short circuit mutual resistance R

_{F}

⇒

Match the following:

List I (F.T and F.S) | List II (Properties) | ||
---|---|---|---|

A. | Fourier Series | 1. | Discrete, Periodic |

B. | Fourier Transform | 2. | Continuous, Periodic |

C. | Discrete Time Fourier | 3. | Discrete aperiodic |

D. | Discrete Fourier Transform | 4. | Continuous, aperiodic |

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

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

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

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

⇒ In root locus analysis the breakaway and break in points

lie on the real axis

either lie on the real axis or occur in complex conjugate pairs

always occur in complex conjugate pairs

none of the above

⇒

**Assertion (A):** 1C 74181 is an ALU in TTL 7400 series.

**Reason (R):** 1C 74181 can accept two 4 bit words and can perform any one of possible 16 arithmetic or logic operations.

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 correct R is wrong

A is wrong R is correct

⇒ The most important primary force of attraction in the formation of solids is

electromagnetic

electrostatic

quantum-electrostatic

quantum electromagnetic

⇒ A transmitted using AM has in modulated carrier output power of 10 KW and can be modulated to a maximum depth of 90% by a sinusoidal modulating voltage without causing overloading. Find the value to which an modulated carrier power can be increased without resulting in overloading if the maximum permitted modulating index is 40%

14 KW

12.96 KW

26.96 KW

2.96 KW

⇒ Which of the following noise becomes of great importance at high frequencies?

Transit-time noise

Shot noise

Flicker noise

Agitation noise

⇒ For a second order system, the position of poles is shown in the given figure. This syste

undamped

overdamped

underdamped

critically damped

⇒ PAM stands for

Pulse Analogue Modulation

Phase Analogue Modulation

Pulse Amplitude Modulation

Phase Amplitude Modulation

⇒ Which of the following is a better recording medium?

Ferric oxide

Ferrous oxide

Chromium di oxide

Either (a) or (b)

⇒ The reading of the voltmeter V in figure should be __________ v

60

10

66

0

⇒ Consider the following in C

- Arithmetic operations can be performed on ints.
- Arithmetic operations can be performed on floats.
- Arithmetic operation can be performed on chars

All

1 and 2 only

1 and 3 only

2 and 3 only

⇒ In a network

the number of tree branches is always less than the number of links

the number of tree branches is always more than the number of links

the number of tree branches and links are always equal

the number of tree branches has no relation with the number of links

⇒ Directive gain is

a power ratio

a voltage ratio

a current ratio

a distance ratio

⇒ In Z

_{RC}(

*s*) = 0 at

*s*= ∞, the last element in first Cauer form is

R

C

R and C in series

R and C in parallel

⇒ Each instruction in assembly language program has the following fields:

- Lable field
- Mnemonic field
- Operand field
- Comment field

1, 2, 3, 4

1, 2, 4, 3

2, 1, 3, 4

2, 1, 4, 3

⇒ A pulse function having magnitude E and duration from

*t*= 0 to

*t*=

*a*can be represented as

sum of two pulse functions

difference of two pulse functions

difference of two step functions each of magnitude E and one originating at

*t*= 0 and the other at

*t*=

*a*

none of the above

⇒ For a short dipole having an effective length less than half the wavelength the radiation resistance is

proportional to length

proportional to square root of length

proportional to square of length

none of the above

⇒ The minority carrier life time and diffusion constant in a semiconducting material are 100 μs and 100 cm

^{2}/s respectively. The diffusion length of carriers is

0.1 cm

0.01 cm

0.0141 cm

1 cm

⇒ An ac bridge uses galvanometer as detector.

TRUE

FALSE

⇒ Consider the following statements:

- A flip-flop is used to store 1-bit of information.
- Race-around condition occurs in a J-K flip-flop when both the inputs are 1.
- Master-slave configuration is used in flip-flops to store 2-bits of information
- A transparent latch consists of a D-type flip-flop.

1 only

1, 3 and 4

1, 2 and 4

2 and 3 only

⇒

**Assertion (A):** For satellites and space probes, PRF of a radar is pretty low.

**Reason (R):** PRF of a radar depends on the range of a radar.

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 correct but R is wrong

A is wrong but R is correct

⇒

Match the following:

List I (BHE, A0) | List II (Word is read/write) | ||
---|---|---|---|

A. | 0, 0 | 1. | 1 byte from/to odd address |

B. | 0, 1 | 2. | 1 byte from/to even address |

C. | 1, 0 | 3. | 16 bit word |

D. | 1, 1 | 4. | None |

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

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

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

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

⇒ In a tape recorder

both record and erase heads have high permeability core

the record head has high permeability core but the erase head has low permeability core

the record head has low permeability core but the erase head has high permeability core

both record and erase heads have low permeability core

⇒ In a voltage regulator circuit using zener diode the load voltage is nearly constant only if

zener current is very small

zener current is very large

zener current is neither small nor large

None of the above

⇒ One limitation of constant

*k*filters is that Z

_{0}is not constant in the pass band.

TRUE

FALSE

⇒ In intrinsic semiconductor at 300 K, the magnitude of free electron concentration in silicon is about

15 x 10

^{4}per cm

^{3}

5 x 10

^{12}per cm

^{3}

1.45 x 10

^{10}per cm

^{3}

1.45 x 10

^{6}per cm

^{3}

⇒ Circuit shown in the figur

astable multivibrator

monostable multivibrator

VCO

ramp Generator

⇒ The pole of a reactive function

lie on

*j*ω axis only

lie on negative real axis only

may lie anywhere on

*s*plane

lie on

*j*ω axis or on negative real axis