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Q1. | The resonant frequency of an R_{F} amplifier is 1 MHz and its bandwidth is 10 kHz. The Q factor will be |

A. | 10 [Wrong Answer] |

B. | 100 [Correct Answer] |

C. | 0.01 [Wrong Answer] |

D. | 0.1 [Wrong Answer] |

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**Also Read Similar Questions Below :**

⇒ An RLC series circuit is fed form 100 V ac supply. Inductance is 1 H and Q = 7.5. At resonance, the voltage across inductance is

750 V

100 V

about 13.5 V

1500 V

⇒ A 24 mm long conductor has a resistance of 128 Ω. The change in resistance is 13.3 Ω and change in length is 1.6 mm under tension. The gauge factor is

1.2

1.6

2.1

2.6

⇒ For Bode plot of (1 +

*j*ωT) has

slope of 20 dB/decade and phase angle + tan

^{-1}(ωT)

slope of - 20 dB/decade and phase angle + tan

^{-1}(ωT)

slope of 20 dB/decade and phase angle - tan

^{-1}(ωT)

slope of - 40 dB/decade and phase angle - tan

^{-1}(ωT)

⇒ In a conventional AM superhetrodyne receivers, the detectors employed to extract intelligence include

Peak detectors

Ratio detectors

PLL

Slope detectors

⇒ Which of these has degenerate

*p*and

*n*materials?

Zener diode

PIN diode

Tunnel diode

Photo diode

⇒ It is required to measure a low magnitude high frequency current. The proper instrument is

moving iron

dynamometer

thermocouple

induction

⇒ Which of the following statements is/are true for the diamond structure?

- Coordination number is four.
- Packing fraction is 0.34
- Copper crystallizes into diamond structure
- Lattice is FCC.

1 only

1, 2 and 4

2 and 3 only

2, 3 and 4

⇒ T-flip-flop is commonly used as

a delay switch

a digital counter only

a digital counter and frequency divider

any of the above

⇒ Magnetic field intensity has the dimensions

IL

I

^{2}L

IL

^{-1}

IL

^{-2}

⇒ Find L

_{eq}if each L is

4/3 H

1/3 H

2/3 H

3/2 D

⇒ Fields are said to be circularly polarised if their magnitudes are

equal and they are in phase

equal but they differ in phase by ± 90°

unequal and differ in phase by ± 90°

unequal but are in phase

⇒ In the given figure,

(A + B)C + DE

AB + C(D + E)

(A + B)C + D + E

none of the above

⇒ The contrast control in colour TV receiver is done by

chroma amplifier

SAW filter

video detector

luminance amplifier

⇒ The ac input voltage of an amplifier

is always equal to ac signal voltage

may be equal to or more than ac signal voltage

is always less than ac signal voltage

may be equal or more or less than ac signal voltage

⇒ The time constant of the circuit in figur

RC

2 RC

3 RC

5 RC

⇒ A two port network is reciprocal if and only if

Z

_{11}= Z

_{22}

BC - AD = - 1

Y

_{12}= Y

_{21}

*h*

_{12}=

*h*

_{21}

⇒ 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

⇒ In an impedance smith chart, a clockwise movement along a constant resistance circle gives rise to

decrease in the value of reactance

an increase in the value of reactance

no change in the reactance value

no change in the impedance value

⇒ Binary multiplication 1 x 0 =

1

0

10

11

⇒ In ac bridge measurements, 'Wagner ground' means

a special RC connection to eliminate stray magnetic effects

a special RC connection to eliminate stray capacitance effects

an unwanted and unintended ground connection

a large metal plate buried in ground connected to one corner of bridge

⇒ Which of the following lines behaves as infinite line?

a line terminated in inductance

a line terminated in capacitance

a short line

a line terminated in

*z*

_{0}

⇒ Two ammeters A and B both 0-10 A have internal resistance of 1 Ω and 0.5 Ω respectively. They are connected in parallel. If total current is 15 A, then

I

_{A}= I

_{B}= 7.5 A

I

_{A}= 5 A, I

_{B}= 10 A

I

_{A}= 10 A, I

_{B}= 5 A

I

_{A}= 9 A, I

_{B}= 6 A

⇒ In cell communication

carrier frequency change

carrier frequency constant

depend upon location

depend upon geographical area

⇒ The minority carrier life time and diffusion constant in a semiconductor material are respectively 100 microsecond and 100 cm

^{2}/sec. The diffusion length is

0.1 cm

0.01 cm

0.0141 cm

1 cm

⇒ The purpose of series quadrature windings in amplidyne is to

neutralize the effect of armature reaction

reduce commutation difficulties

increase the gain

increase response time

⇒ The waveform shown in the given Figure can be written

*v*(

*t*) =

*u*(

*t*- 1) +

*u*(

*t*- 2) +

*u*(

*t*- 3) +

*u*(

*t*-4)

*v*(

*t*) =

*u*(

*t*- 1) +

*u*(

*t*- 2) +

*u*(

*t*- 3) +

*u*(

*t*-4) -

*u*(

*t*- 5)

*v*(

*t*) =

*u*(

*t*- 1) +

*u*(

*t*- 2) +

*u*(

*t*- 3) +

*u*(

*t*-4) - 4

*u*(

*t*- 5)

*v*(

*t*) =

*u*(

*t*- 1) +

*u*(

*t*- 2) +

*u*(

*t*- 3) +

*u*(

*t*-4) + 4

*u*(

*t*- 5)

⇒ The transfer function of transportation lag is

G(

*j*ω) =

*e*

^{jωT }

G(

*j*ω) =

*e*

^{-jωT }

G(

*j*ω) = (1 +

*j*ωT)

G(

*j*ω) = (1 -

*j*ωT)

⇒ The amplifier network is shown bel

6.42 kΩ, 5.6 kΩ

6.42 Ω, (5.62) kΩ

6.4kΩ, (5.62) kΩ

6.42 Ω, 5.6 kΩ

⇒ In figure, V

_{1}= 40 V when R = 10 Ω, if R = 0, V

_{2}wil

40 V

30 V

20 V

10 V

⇒ In tape recorders the hissing noise is due to irregularities in magnetic coating on tape.

TRUE

FALSE