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Q1. | Logarithmic amplifiers are used in |

A. | adders [Wrong Answer] |

B. | dividers [Correct Answer] |

C. | multipliers [Wrong Answer] |

D. | all 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 :**

⇒ Figure shows characteristics curves for bipolar transistor. These curves

output characteristics of

*n*-

*p*-

*n*transistor (common base)

output characteristics of

*p*-

*n*-

*p*transistor (common base)

output characteristics of

*n*-

*p*-

*n*transistor (common emitter)

output characteristics of

*p*-

*n*-

*p*transistor (common emitter)

⇒

Match the following:

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

A. | lag compensation | 1. | Exterior of unit circle |z| = 1 |

B. | lead compensation | 2. | PD control |

C. | stability | 3. | Non-minimum phase |

D. | Instability | 4. | Left half s plane |

5. | PI control |

A-2, B-5, C-1, D-3

A-3, B-1, C-2, D-5

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

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

⇒ In a klystron amplifier the force on all electrons

causes acceleration of all electrons

causes retardation of all electrons

causes acceleration of some electrons and retardation of others

none of the above

⇒ For an amplifier, the coupling method which gives the highest gain in

impedance coupling

transformer coupling

capacitance coupling

resistance coupling

⇒ The horizontal intercept of dc load line is the same as ideal

cut off point

saturation point

operating point

quasi saturation point

⇒ A narrow band FM does not have the following feature

it has two sidebands

both sideband equal in magnitude

both sideband have same Phase Difference

it does not show Amplitude variation

⇒ High cut off frequency can be expected in case of

common-base

common-emitter

common-collector

all of the above

⇒

Match the following:

List I (Binary) | List II (Hexadecimal) | ||
---|---|---|---|

A. | 10101010 | 1. | FF |

B. | 11111111 | 2. | 88 |

C. | 10001000 | 3. | 92 |

D. | 10010010 | 4. | AA |

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

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

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

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

⇒ A d.c. power supply has an open circuit voltage of 100 V. When the full load current is drawn, the output drops to 80 V. The percentage voltage regulation is

0.9725

0.75

0.5

0.25

⇒ All of the output pulses are at full transmitter power for a strong signal in all of the following except

PWM

PAM

PFM

PCM

⇒ Two coils X and Y have self inductances of 5 mH and 10 mH and mutual inductance of 3 mH. If the current in coils X change at a steady rate of 100 A/s, the emf induced in coil Y is

0.3 V

0.5 V

1 V

1.5 V

⇒ In a transmission line, losses due to dielectric heating are

proportional to voltage and inversely proportional to Z

_{0}

proportional to voltage and proportional to Z

_{0}

proportional to current and proportional to Z

_{0}

proportional to current and inversely proportional to Z

_{0}

⇒ Over which frequency range the effect of atmospheric noise is significant?

Over 35 MHz

Below 30 MHz

Between 30 MHz and 100 MHz

Between 100 MHz and 150 MHz

⇒ Figure shows a dc circuit fed by a current source. With respect to terminals AB, Thevenin's voltage and Thevenin's resistance

V

_{TH}= 5 V, R

_{TH}= 0.75 Ω

V

_{TH}= 2.5 V, R

_{TH}= 0.75 Ω

V

_{TH}= 2.5 V, R

_{TH}= 1 Ω

V

_{TH}= 5 V, R

_{TH}= 1 Ω

⇒ Nichols chart consists of M and N locii in log magnitude versus phase diagram.

TRUE

FALSE

⇒ Drain feedback bias is often used with

D MOSFETs

E MOSFETs

both D and E MOSFETs

neither D nor E MOSFETs

⇒ Two passive elements are connected in series and a dc voltage is applied to the circuit. The time variation of the current is shown in figure. The two elements

one resistance and the other inductance

both resistances

one inductance and the other capacitance

one resistance and the other capacitance

⇒ When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .

reflection

refraction

transmission

none of the above

⇒ If R(t) is autocorrelation of a waveform

*v*(

*t*) and R(0) is autocorrelation for t = 0, then

R(0) > R(t)

R(0) ≥ R(t)

R(0) < R(t)

R(0) ≤ R(t)

⇒ If the changes in zener current in a voltage regulator circuit are too large, it can be corrected by using a

emitter follower

CE amplifier

capacitor

either (a) or (b)

⇒ At corner frequency the phase angle of factor 1/(1 +

*j*ωT) is

+90°

-90°

+45°

-45°

⇒ Which multivibrator can be used as a clock timer?

Astable multivibrator

Bistable multivibrator

Any of the above

None of the above

⇒ Which pair is correctly matched?

Symmetrical two port AD - BC = 1

Reciprocal two port

*z*

_{11}=

*z*

_{12}

Inverse hybrid parameter A, B, C, D

hybrid parameter (V

_{1}, I

_{2}) =

*f*(I

_{1}, V

_{2})

⇒ In figure, the current supplied by battery immediately after switching on the circui

0.0416666666666667

0.166666666666667

0.416666666666667

0

⇒ When a binary adder is used as BCD adder, the sum is

correct when it is < 9

correct when it is > 9

correct when it is < 16

none of these

⇒ In which frequency range is the noise figure in a transistor independent of frequency

intermediate frequencies

high frequency

low frequencies

both low and high frequencies

⇒ An

*m*derived low pass filter has

*f*

_{c}= 1000 Hz and

*m*= 0.6. This filter will have infinite attenuation at

*f*= 1250 Hz

all frequencies above 1000 Hz

*f*= 1562.5 Hz

*f*= 1666.67 Hz

⇒ The number of stator field windings in an ac tachometer are

1

2

3

4

⇒ The Boolean function realized by the logic circuit show

F = Σ

*m*(0, 1, 3, 5, 9, 10, 14)

F = Σ

*m*(2, 3, 5, 7, 8, 12, 13)

F = Σ

*m*(1, 2, 4, 5, 11, 14, 15)

F = Σ

*m*(2, 3, 5, 7, 8, 9, 12)

⇒ In figure, the switch is closed at

*t*= 0. At

*t*= 0

^{+},

*di*/

*dt*= 4 A/s. Then

10 V

20 V

40 V

80 V