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Q1. | A Hartley oscillator uses |

A. | a tapped capacitor [Wrong Answer] |

B. | a tapped inductor [Wrong Answer] |

C. | a tapped inductor for inductive feedback [Correct Answer] |

D. | none 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 :**

⇒ In single tone AM modulation, the transmission efficiency for

*m*= 1 is

0.333

0.5

1

0.1665

⇒ Figure uses 10 V zener diode. The minimum and maximum current through series resistance

10 mA and 30 mA

20 mA and 40 mA

0 and 30 mA

0 and 40 mA

⇒

Match the following:

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

A. | Servomotor | 1. | Error detector |

B. | Amplidyne | 2. | Transducer |

C. | Potentiometer | 3. | Actuator |

D. | Flapper valve | 4. | Power amplifier |

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

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

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

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

⇒ If operator '

*a*' = 1 ∠120° then (1 -

*a*

^{2}) =

1 ∠ - 30°

1 ∠ 30°

1 ∠ - 60°

1 ∠60°

⇒ The disadvantage of FET over BJT is

poor high frequency performance

low power-handling ability

low values of voltage gain

all of the above

⇒ A frequency doubler has an FM signal input at 13 MHz with a deviation of 5 kHz. The output, frequency for the carrier will be

26 MHz

26.1 MHz

10 kHz

160 kHz

⇒

Match the following:

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

A. | Bode | 1. | Asymptotic plots |

B. | Evans | 2. | Polar plots |

C. | Nyquist | 3. | Root locus technique |

4. | M and N circles |

A-1, B-4, C-2

A-2, B-3, C-4

A-3, B-1, C-4

A-1, B-3, C-2

⇒ Maximum effective aperture (A

_{e})max of short dipole antenna is

1.119 λ

^{2}

0.119 λ

^{2}

1.19 λ

^{2}

1.919 λ

^{2}

⇒ The number of comparators of needed in a parallel conversion type 8 bit

*A*to

*D*converter is

8

16

255

256

⇒ Given below a block diagram of oscillator circuit with various reactance elemen

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= C

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= L

*x*

_{1}= C,

*x*

_{2}= C,

*x*

_{3}= L

*x*

_{1}= L,

*x*

_{2}= C,

*x*

_{3}= L

⇒ The primary function of a clamper circuit is to

suppress variations in signal voltage

raise +ve half cycle to the signal

Lower -ve half cycle of the signal

introduce a dc level into an a.c. signal

⇒ The number of roots of

*s*

^{3}+ 2

*s*

^{2}+ 7

*s*+ 3 = 0 in the left half of the s-plane is :

zero

one

two

three

⇒ To protect an SCR against high

*di*/

*dt*we connect

a capacitance in series with SCR

a capacitance in parallel with SCR

an inductance in parallel with SCR

an inductance in series with SCR

⇒ Consider isotropic radiator radiating a power of 1 watt. At a distance of 1 metre, the power per unit area with equal

1 watt/m

^{2}

4p watt/m

^{2}

1/4p watt/m

^{2}

2p watt/m

^{2}

⇒ Choose the correct option

var (X) = σ

_{x}^{2}

σ

^{2}= E(X

^{2}) - μ

^{2}

var (CX) = C

^{2}Var (X)

all

⇒ In a strain measuring device using a strain gauge, the output quantity is

voltage

resistance

impedance

either (a) or (b)

⇒ A good ohmic contact on a P-type semiconductor chip is formed by introducing

gold as an impurity below the contact

high concentration of donors below the contact

high concentration of acceptors below the contact

thin insulator layer between the metal and semiconductor

⇒ Data from a satellite is received in serial form (1 bit after another). If this data is coming at a 5 MHz rate and if the clock frequency is 5 MHz how long will it take to serially load a word in a 32-bit shift register?

1.6ms

3.2ms

6.4ms

12.8ms

⇒ In a transistor I

_{E}= 10 mA, I

_{CO}= 0.5 μA and a = 0.995. Then I

_{CEO}=

100 μA

25 μA

10.1 mA

10.5 mA

⇒

Match the following:

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

A. | D Layer | 1. | 110 km |

B. | E layer | 2. | 10 km |

C. | F layer | 3. | 60 km |

D. | Troposphere | 4. | 350 km |

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

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

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

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

⇒ The figure of merit for a logic family is

gain band width product

(propagation delay time) (power dissipation)

(fan out) (power dissipation)

(noise margin) (power dissipation)

⇒ In the following figure C = 0.02 μF, and V

_{th}is known to be of frequency ω = 10

^{7}rad/sec and

*r*

_{d}= 2.5 Ω and Z

_{Th}= R

_{Th}= 10 Ω Then phase angle between

*i*

_{d}and V

_{d26.5°25°30°0°}

⇒ For a type 0 system and unit ramp input, the steady state error is

0

∞

1

1/K

_{V}⇒ If a function Z(

*s*) has a pole at infinity, then

the degrees of numerator and denominator are equal

the degree of numerator is one higher than that of denominator

the degree of denominator is one higher than that of numerator

the difference between the degrees of numerator and denominator is 0 or 1

⇒ Which one of the following is true?

Alternating voltage and current contain odd and even harmonics

The inductance in a circuit reduces the effect of harmonics and makes current wave more sinusoidal than voltage wave

Alternating voltage and current waveforms, in general, do not contain odd harmonics

Inductance of a circuit does not alter wave shape at all

⇒ The attenuation in a waveguide near the cut off frequency is

zero

low

high

very high

⇒ Large scale integration refers to

more than 50 gates on the same chip

more than 80 gates on the same chip

more than 100 gates on the same chip

none of the above

⇒ The presence of some holes in an intrinsic semiconductor at room temperature is due to

valence electrons

doping

free electrons

thermal energy

⇒ In figure the output

*v*(

*t*)

phase modulated signal

amplitude modulated signal

frequency modulated signal

none of the above

⇒ Contents of RAM cannot be altered.

TRUE

FALSE