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Q1. | An amplifier with loop gain Aβ will be more stable for value of Aβ as |

A. | 0.95 [Wrong Answer] |

B. | 0.7 [Correct Answer] |

C. | 1.2 [Wrong Answer] |

D. | 1.5 [Wrong Answer] |

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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 :**

⇒ The discrete time system describes by

*y*(

*n*) =

*x*(

*n*

^{2}) is

casual, Linear, time varying

casual, non-linear, timevari

non-casual, Linear, time invariant

non-casual, non-linear, time variant

⇒

Match the following:

List I (Transmission system) | List II (Mode) | ||
---|---|---|---|

A. | Rectangular waveguide | 1. | TE/TM |

B. | Circular waveguide | 2. | TEM |

C. | Coaxial line | 3. | Quasi TEM |

D. | Microstrip line |

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

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

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

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

⇒ A current source inverter has simple commutation circuit.

TRUE

FALSE

⇒ A low-pass filter frequency responce H (

*j*ω) = A (ω)

*e*

^{jΦ}(ω) does not produce any phase distortion, if

A(ω) = Cω

^{2}, Φ (ω) =

*k*ω

^{3}

A(ω) = Cω

^{2}, Φ (ω) =

*k*ω

A(ω) = Cω

^{2}, Φ (ω) =

*k*ω

^{2}

A(ω) = C, Φ (ω) =

*k*ω

^{-1}

⇒ Which display device resembles vacuum tube?

LED

LCD

VF

None of these

⇒ An end fire array consisting of several half-wave lengths of directive gain 40, then Find width of major lobe for broadside

6°

5.73

51.25

0°

⇒ Directivity of antenna is defined as

maximum directive gain

average directive gain

∞

0

⇒ The voltage across a zener diode

is constant in forward direction

is constant in reverse direction

is constant in both forward and reverse directions

none of the above

⇒ Which of the following statements is not correct for thermistors?

They have negative temperature coefficient of resistance

The sensing element is made of sintered ceramics, which are oxides of metals in the form of beads

The variation of resistance with temperature is linear

The resistance value at ambient temperature may range from 100 Ω to 100 kΩ

⇒ Which of the following instruments is used almost exclusively to measure radio frequency currents?

Moving coil

Rectifier

Moving iron

Thermocouple

⇒ In the circuit of figure, the value of

*r*

_{e}is (neglecting

*v*

_{be100 Ω75 Ω50 Ω25 Ω}

⇒ Inverse Fourier transform of '1' is

U(

*t*)

δ(

*t*)

0'

infinite

⇒ The open loop gain of an amplifier is 50 but likely to decrease by 20% due to various factors. If negative feedback with β = 0.1 is used, the change in gain will be about

0.2

0.02

0.005

0.0005

⇒ High frequency waves are

absorbed by the F

_{2}layer

reflected by the D layer

affected by the solar cycle

none of the above

⇒ For the infix expression (A/B) * (C * F + (A - D) * E) the corresponding Post fix notation is

A / D * CF AD - F * +

AB / CF * AD - E * + *

AB / C * FAD - E * + *

None of the above

⇒ A DC voltage source is connected across a series R - L - C circuit. Under steady-state conditions, the applied DC voltage drops entirely across the

R only

C only

L only

R and L combination

⇒ Figure represen

Diode rectifier

Schottky diode

Varistor

None of the above

⇒ In the given circuit, viewed from AB, the circuit can be reduced to an equivalent circui

5 volts source in series with 10 Ω resistor

7 volts source in series with 2.4 Ω resistor

15 volts source in series with 2.4 Ω resistor

1 volt source in series with 10 Ω resistor

⇒ If the circumference of a spherical target is between 1 to 10 wavelength in a radar system, the situation is called

resonance region

Rayleigh region

optical region

binomial region

⇒ Eddy current loss is

proportional to frequency

independent of frequency

proportional to (frequency)

^{2}

proportional to (frequency)

^{3}

⇒ A radio frequency choke permits an easy flow of __________ current and at the same time it offers a very impedance to __________ currents.

A.C., low frequency

A.C., high frequency

D.C., low frequency

D.C. high frequency

⇒ Ferromagnetic materials exhibit

a linear B-H behaviour

a non-linear B-H behaviour

an exponential B-H behaviour

none of the above

⇒

Match the following:

List I (μP) | List II (Number of bits in register) | ||
---|---|---|---|

A. | 8085 | 1. | 32 bit |

B. | 8086 | 2. | 16 bit |

C. | 68000 | 3. | 8/16 bit |

A-1, B-2, C-3

A-2, B-3, C-1

A-3, B-2, C-1

A-3, B-1, C-2

⇒ The voltage in a circuit follows the law

*v*= 100 sin ω

*t*if the frequency is 25 Hz, how long will it take for the voltage to rise to 50 volts?

1/150

*s*

1/100

*s*

1/300

*s*

1/600

*s*

⇒ For parallel plane waveguides, which is the mode with lowest cut-off frequency?

TE

_{10}

TM

_{10}

TEM

TE

_{11}

⇒

Match the following:

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

A. | Reactance theorem | 1. | Foster |

B. | Driving point impedance | 2. | Bartlett |

C. | Continued fraction expansion | 3. | Cauer |

D. | Bisection Theorem | 4. | Positive real function |

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

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

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

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

⇒ Characteristic impedance of a coaxial cable is inversely proportional to ∈

*.*

_{r}TRUE

FALSE

⇒ If the functions

*w, x, y, z*are as foll

*w = z x = z*

*w = z, x = y*

*w = y*

*w = y = z*

⇒ If VSWR is infinite, the transmission line is terminated in

short circuit

complex impedance

open circuit

either (a) or (c)

⇒ In the circuit shown in the given figure, power dissipated in the 5 Ω resisto

zero

80 W

125 W

405 W