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Q1. | The main use of JFET with a |

A. | frequency mixer [Wrong Answer] |

B. | source follower [Correct Answer] |

C. | voltage doubler [Wrong Answer] |

D. | trigger [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 :**

⇒ An energy signal has G(

*f*) = 10. Its energy density spectrum is

10

100

50

20

⇒ Two numbers are 131 ± 5 and 629 ± 3. The sum of the numbers with range of doubt is

760 ± 8

760 ± 2

760 + 8

760 - 8

⇒ Industrial heating furnaces such as arc and induction furnaces operate on __________ power factor

low leading

low lagging

high leading

very low lagging

⇒

Match the following:

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

A. | V_{OH}(min) | 1. | 2.4 V |

B. | V_{IH}(min) | 2. | 1.5 V |

C. | V_{OL}(max) | 3. | 0.4 V |

4. | 2.0 V | ||

5. | 0.8 V |

A-1, B-3, C-4

A-1, B-4, C-3

A-5, B-4, C-3

A-1, B-5, C-2

⇒ The coefficients F

_{n}in the exponential form of Fourier series are

independent of frequency

functions of frequency

even function of frequency

odd functions of frequency

⇒ If

*x*

_{1}(

*t*) = 2 sin p

*t*+ cos 4 p

*t*and

*x*

_{2}(

*t*) = sin 5 p

*t*+ 3 sin 13 p

*t*then

*x*

_{1},

*x*

_{2}both periodic

*x*

_{1}

*x*

_{2}both not periodic

*x*

_{1}periodic,

*x*

_{2}not periodic

*x*

_{1}is not periodic ; but

*x*

_{2}is periodic

⇒ Troposphere is the portion of atmosphere

nearest to ground

between 50 to 90 km above ground

between 110 to 220 km above ground

between 250 to 350 km above ground

⇒ The common gate amplifier has a characteristically __________ input resistance and a __________ output resistance.

low, low

high, high

low, high

high, low

⇒ Y signal has maximum percentage of

red colour

blue colour

green colour

red and blue colours

⇒ In a resistance loaded amplifier, the gain decreases at high frequencies because

decreasing reactance of the stray C

_{T}

increasing reactance of the stray C

_{T}

increasing reactance of C

_{T}

decreasing reactance of C

_{T}

⇒ The sum of positive real functions

is a positive real function

may be a positive real function or not

can not be a positive real function

either (b) or (c)

⇒ The properties of FETs closely resemble those of a

thermionic valve

P-N-P transistor

N-P-N transistor

UJT

⇒ Which of the following is not correct for two phase servomotor?

Rotor diameter is small

Applied voltages are seldom balanced

Rotor resistance is low

Torque speed curve is linear

⇒ A 10 bit ADC with a full scale output voltage of 10.24 V is to be designed to have ± LSB/2 accuracy. If ADC is calibrated at 25°C, the maximum net temperature coefficient of ADC should not exceed

± 200 μV/°C

± 400 μV/°C

± 600 μV/°C

± 800 μV/°C

⇒ Calculate

*i*(

*t*) for

*t*≥ 0, assuming the switch has been in position A for a long time at

*t*= 0, the switch is moved to positio

1 +

*e*

^{-5 x 103t}

*e*

^{-5 x 103t}

1.11

*e*

^{-5 x 103t}

1.11 (1 -

*e*

^{-5 x 103t})

⇒ Which of the following terminations makes the input impedance of a line equal to characteristic impedance Z

_{0}?

line open circuited at far end

line terminated in Z

_{0}

line short circuited at far end

line terminated in inductance

⇒ The factor n in the equation for calculating current for a silicon diode is

1

2

2.5

2 for low levels of current and 1 for high levels of current

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

`KPR`

`LINE`

`JOB`

`RATE`

⇒ What is the normal range of analog input voltage?

0 to 1 V

0 to 5 V

5 to 15 V

15V to 30V

⇒ The

*n*state variables can be considered as

*n*components of a state vector.

TRUE

FALSE

⇒ Find current flowing through 1 H inductor at

*t*= 0, at which switch 'S' is ope

0

2

3

5

⇒ PCM : Quantising Noise :: Transistor :

Partition noise

Shot noise

Whirl

No noise

⇒ In rectifier circuits, the rms value of ac component of output voltage is equal to

V

_{rms}

0.5 V

_{rms}

(V

_{rms}- V

_{dc})

^{0.5}

(V

_{rms}

^{2}- V

_{dc}

^{2})

^{0.5}

⇒ An enhancement mode MOSFET is on when the gate voltage is

zero

positive

high

more threshold value

⇒ Photoconductive devices uses

metallic conductors

good quality insulators

semiconductors

either (a) or (c)

⇒ In which of the following circuits is op-amp used in open loop configuration?

Comparator

Summing amplifier

Integrating amplifier

Logarithmic amplifier

⇒ Which of the- following display consumes least amount of power?

LCD

LED

Fluorescent display

All display consume same power

⇒ Resonant circuits are used in

audio amplifiers

RF amplifiers

both audio and RF amplifiers

none of the above

⇒ The polarization of dielectric materials results in

production of eddy currents

creation of electric dipoles

absorption of electrons

release of high velocity protons

⇒ The colour code on a carbon resistor is yellow-violet-orange. The value of resistance is

17000 Ω

27000 Ω

37000 Ω

47000 Ω