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Q1. | Which family of logic circuits uses field effect transistors? |

A. | TTL [Wrong Answer] |

B. | CMOS [Correct Answer] |

C. | Both LED and well as LCD [Wrong Answer] |

D. | None of the above [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 :**

⇒ In the circuit of figure the current through 5 Ω resistance at

*t*= &infin

0

0.416666666666667

6.67 A

5.1 A

⇒ Strip lines are used at

microwave frequency

low frequency

High frequency

at any frequency

⇒ The network shown in figur

reciprocal

reciprocal and symmetrical

non-reciprocal

unsymmetrical

⇒ In a current transformers

the number of turns in primary and secondary windings are nearly equal

the number of primary turns is very small as compared to number of secondary turns.

the number of secondary turns is very small as compared to the number of primary turns

either (a) or (c).

⇒ Consider the following statements.

- Etching
- Exposure to UV radiation
- Stripping
- Developing

2, 4, 3, 1

2, 4, 1, 3

4, 2, 1, 3

3, 2, 3, 1

⇒ For a transistor to have-a larger β it must have and a

close to zero

close to 0.5

close to unity

nearly infinite

⇒ In the network of figure, the voltage drops across R

_{1}, R

_{2}, R

_{3}are 6 V, 8 V and 12 V with polarities as shown. The value of R

_{312 Ω8 Ω5 Ω3 Ω}

⇒ A coil is wound having a diameter

*d*. Its inductance is 10 mH. If it is rewound on the same core with a wire having diameter 0.5

*d*and total weight of the wire is the same as before, the inductance will be

5 mH

10 mH

160 mH

40 mH

⇒ The gain margin of first and second order systems is infinite.

TRUE

FALSE

⇒ The application of gate signal decreases the break over voltage of on SCR.

TRUE

FALSE

⇒

**Assertion (A):** A half cycle of sine wave can be expressed as sum of sine wave and another sine wave shifted by *T*/2 where T is the time period.

**Reason (R):** The function *u*(*t* - *t*_{0}) - *u*(*t* - *t*_{0} - T) is a gate function occuring at *t* = *t*_{0} and of duration T.

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 carrier is modulated by a digital bit stream having one of the possible phases of 0°, 90°, 180°, and 270°, then modulation is called

BPSK

QPSK

QAM

MSK

⇒ Thyristors connected in series need :

static equalizing circuit

dynamic equalizing circuit

both static and dynamic equalizing circuits

none of the above

⇒ A message signal with bandwidth 10 kHz is lower sideband SSB modulated with carrier frequency

*f*

_{c1}= 10

^{6}Hz. The resulting signal is then passed though a narrow band frequency modulator with carrier frequency

*f*

_{c2}= 10

^{9}Hz. The bandwidth of the output would be

4 x 10

^{4}Hz

2 x 10

^{6}Hz

2 x 10

^{9}Hz

2 x 10

^{10}Hz

⇒

Match the following:

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

A. | Poles and zeros of lie an real axis driving point LC network | 1. | lie an real axis |

B. | Canonic LC network has | 2. | a zero |

C. | The number of Canonic networks for the given driving point function | 3. | minimum number of elements |

D. | The first critical frequency nearest the origin for RL driving point impedance | 4. | four |

5. | minimum number of elements | ||

6. | alternate | ||

7. | either a pole or zero | ||

8. | three |

A-1, B-5, C-8, D-7

A-6, B-5, C-3, D-2

A-1, B-5, C-4, D-2

A-1, B-3, C-4, D-7

⇒ The first and the last critical frequencies (singularities) of a driving point impedance function of a passive network having two kind of elements, are a pole and a zero respectively. The above property will be satisfied by

RL network only

RC network only

LC network only

RC as well as RL network

⇒ In a single phase full wave regulator feeding a resistive load, the average current over one full cycle

is always zero

cannot be zero

may be sometimes zero

is always positive

⇒ Two similar mutually coupled coils have a total inductance of 900 mH and coefficient of coupling 0.5. The self inductance of each coils is

300 mH

150 mH

75 mH

50 mH

⇒

Match the following:

List I (Microwave device) | List II (Application) | ||
---|---|---|---|

A. | PIN diode | 1. | Microwave amplification |

B. | GaAs MOSFET | 2. | Low noise microwave generation |

C. | Transferred electron device | 3. | Electronic tuning of MW oscillator |

D. | Varactor diode | 4. | Light wave detection |

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

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

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

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

⇒ For TM waves in a parallel plate waveguide, the minimum attenuation arising from imperfect conductors would occur at a freq. of (

*f*is the cut off frequency)

_{c}3

*f*

_{c}3

*f*

_{c}2

*f*

_{c}2

*f*

_{c}⇒ In electromagnetic wave polarization is caused by

refraction

reflection

longitudinal nature of electromagnetic waves

transverse nature of electromagnetic waves

⇒ A computer window has a bar at its top to bear the name of window. This bar is called

title bar

status bar

menu bar

control bar

⇒ The relative stability of a system is given by

gain margin alone

phase margin alone

both phase and gain margins

either (a) or (b)

⇒ The symbol in figure is

DIAC

P-N junction diode

Schottky diode

None of the above

⇒

Match the following:

List I (Types of N-bit ADC) | List II (Characteristics) | ||
---|---|---|---|

A. | Flash converter | 1. | Integrating Type |

B. | Successive | 2. | Fastest converter approximation |

C. | Counter ramp | 3. | Maximum conversion time = N bits |

D. | Dual slow | 4. | Used a DAC in its feedback path |

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

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

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

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

⇒ In given figure a silicon diode is carrying a constant current of 1 mA. When the temperature of the diode is 20°C, V

_{D}is found to be 700 mV. If the temperature rises to 40°C, V

_{D}becomes approximately equa

747 mV

660 mV

680 mV

700 mV

⇒ The reverse saturation current in a semiconductor diode consists of

avalanche current

zener current

minority carrier current

minority carrier current and surface leakage current

⇒ A unipole is also known as

omnidirectional radiator

unidirectional radiator

line radiator

none of the above

⇒ A counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time

8 μ sec

10 μ sec

2 μ sec

5 μ sec

⇒ Consider an arbitrary distribution of conducting bodies in a charge free space according to the uniqueness theorem, which of following are required to be specified in order that the field is uniquely determined everywhere?

- Total charge on each conductor
- Potential at each conductor surface
- Potential at same of conductor and total charge on the remainder
- Total charge as well as potential gradient on each conductor surface

1 and 3

2 and 4

1, 2, and 3

1, 2, 3, 4