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Q1. | The logic represented by the abbreviation ECL is |

A. | Emitter Coupled Logic [Correct Answer] |

B. | Electron Carrier Logic [Wrong Answer] |

C. | Encoding Clock Logic [Wrong Answer] |

D. | Electrostatic Channel Logic [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ 24 telephone channels are frequency division multiplexed using an SSB modulation. Assuming 3 kHz per channel, the required band width is

8 kHz

27 kHz

21 kHz

72 kHz

⇒ The maximum percent overshoot with maximum value of first overshoot as 3.5 V and steady state value as 2.575 V is

0.3592

0.2643

0.5761

0.1524

⇒ At room temperature the current in an intrinsic semiconductor is due to

holes

electrons

ions

holes and electrons

⇒ The most frequent users of long distance VLF transmission is

ship communication

radio broadcasting

TV broadcasting

telephone and telegraph

⇒

Match the following:

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

A. | Mu Metal | 1. | very high magnetic permeability |

B. | Samrium/cobalt | 2. | very high magnetic remanence |

C. | Sapphire | 3. | very high thermal conductivity |

D. | Ferrites | 4. | very stable magnetic permeability |

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

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

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

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

⇒ The most widely used LC oscillator is

Hartley oscillator

Crystal oscillator

Colpitt's oscillator

Clapp's oscillator

⇒ For a second order system ω

_{n}is natural frequency, ω

*is frequency of damped oscillations and ζ is damping factor. Then*

_{d}ω

_{d}= ω

_{n}ξ

ω

_{d}= ω

_{n}(1 - ξ)

^{2}

ω

_{d}= ω

_{n}(1 - ξ)

^{0.5}

ω

_{d}= ω

_{n}(1 - ξ

^{2})

^{0.5}

⇒ In JK flip flop toggle state exists if

J = 0, K = 1

J = 1, K = 0

J = 0, K = 0

J = 1, K = 1

⇒ Which memory does not require programming equipment?

RAM

EPROM

EEPROM

UVPROM

⇒ The pole zero plot of the given figure is

non-minimum phase function

minimum phase function

all pass function

either (b) or (c)

⇒ When P

_{c}is the unmodulated carrier power and P

_{t}is the total power in the modulated wave, then the maximum power in AM wave is

P

_{t}= 1.5 P

_{c}

P

_{t}= 2.5 P

_{c}

P

_{t}= 2

P

_{t}= 22 P

_{c}

⇒ Figure represen

NPN transistor

PNP transistor

Zener diode

Power diode

⇒ A volt ratio box should have low resistance.

TRUE

FALSE

⇒ A digital frequency counter can be converted to DVM by addition of a suitable

voltage controlled oscillator

D/A converter

power amplifier

operational amplifier

⇒ A capacitor stores 0.15C at 5 V. Its capacitance is

0.75 F

0.75 μF

0.03 F

0.03 μF

⇒ Consider two random processes

*x(t)*and

*y(t)*have zero mean, and they are individually stationary. The random process is

*z(t)*=

*x(t)*+

*y(t)*. Now when stationary processes are uncorrelated then power spectral density of

*z(t)*is given by

S

*+ S*

_{x}(f)*+ 2S*

_{y}(f)

_{xy}(f)S

*+ S*

_{x}(f)*+ 2S*

_{y}(f)*+ 2S*

_{xy}(f)

_{yx}(f)S

*+ S*

_{x}(f)

_{y}(f)S

*+ S*

_{x}(f)*- 2S*

_{y}(f)*- 2S*

_{xy}(f)

_{yx}(f)⇒ If G(

*s*)H(

*s*) = K (T

_{1}

*s*+ 1)/[

*s*

^{2}(T

_{2}s + 1)] the system stability depended an relative magnitudes of T

_{1}and T

_{2}.

TRUE

FALSE

⇒ A 12 bit ADC is employed to convert an analog voltage of zero to 10 volts. The resolution of the ADC is

2.44 mV

24.4 mV

83.3 mV

1.2 V

⇒ Stray capacitance is important at low frequencies.

TRUE

FALSE

⇒ Fleming's left hand rule is used to find

direction of force on a current carrying conductor

direction of flux in solenoid

direction of magnetic field due to a current carrying conductor

direction of induced emf

⇒ A capacitor is needed for an ac circuit of 230 V, 50 Hz the peak voltage rating of the capacitor should be

230 V

0.5 x 230 V

2 x 230V

230/2V

⇒ Which is not a software?

DOS

Windows

MS WORD

Hard disk

⇒

Match the following:

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

A. | TTL | 1. | Low propagation delay |

B. | ECL | 2. | Low power consumption |

C. | MOS | 3. | High packing density |

D. | CMOS | 4. | Saturated bipolar logic |

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

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

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

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

⇒ If the AF voltage is raised to 10 V, while the AM is dropped to 200 Hz, what is the deviation?

10 kHz

15 kHz

20 kHz

40 kHz

⇒ In waveguides the existing waves are

TE only

TM only

both (a) and (b)

all of the above

⇒ Consider the following library functions

- EXP (
*i.e., e*^{x}) - ARCTAN (
*i.e.* tan^{-1} *x*) - SQRT (
*i.e., x*) - AES (
*i.e. *|*x*|) <

All

1 and 3 only

1, 3, 4 only

1, 2 and 3 only

⇒ In cellular telephone each cell is designed to handle

45 two way communications

90 two way communications

45 one way communications

180 two way communications

⇒ In a metal the probability of a state 0.1 eV below Fermi level being occupied

is more than the probability of state 0.1 eV above Fermi level being occupied

is the same as the probability of state 0.1 eV above Fermi level being occupied

is less than the probability of state 0.1 eV above Fermi level being occupied

may be equal to or more or less than the probability of state 0.1 eV above Fermi level being occupied

⇒ A step up chopper can give an output voltage

higher than input voltage

lower than input voltage

both higher and lower input voltage

all of the above

⇒ Figure shows an RC potentiometer to measure ac voltage. It is desired that V_{0}/V_{i} should be independent of frequency. The value of C should

10 μF

11 μF

0.1 μF

0.09 μF

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