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Q1. | Typical values of voltage gain for CE, CB and CC amplifiers are |

A. | 100, 100 and 1 respectively [Correct Answer] |

B. | 100, 1 and 100 respectively [Wrong Answer] |

C. | 100, 1 and 1 respectively [Wrong Answer] |

D. | 1, 100 and 100 respectively [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ The effective value of the waveform in the given figur

5

2.5

2.5

5.0

⇒ The relation between the apparent power, actual power and reactive power is given by

Apparent power = actual power + reactive power

Apparent power = actual power - reactive power

Apparent power = (actual power)

^{2}- (reactive power)

^{2}

Apparent power = (actual power)

^{2}+ (reactive power)

^{2}

⇒ A . 0 =

1

A

0

A or 1

⇒ The units of resistivity are ohm-metre.

TRUE

FALSE

⇒ Denominator polynomial of a transfer function of certain network

stable

oscillatory

unstable

depends on numerator polynomial

⇒ FM transmitting and receiving equipment as compared to AM equipment is

costly

cheaper

almost equally costly

none of the above

⇒ AM amplifier having noise figure of 20 dB and available power gain of 15 dB is followed by a mixer circuit having noise figure of 9 dB. The overall noise figure as referred to input in dB is

10.44

11.07

21.52

0.63

⇒ The signals in 8086 are classified into

minimum mode and maximum mode

decrement mode and increment mode

low mode and high mode

none of the above

⇒ A 1 μF capacitor is connected to 12 V battery. The energy stored in the capacitor is

12 x 10

^{-6}J

24 x 10

^{-6}J

48 x 10

^{-6}J

72 x 10

^{-6}J

⇒ The equivalent form of the logical expression (ABC + ABC + ABC + ABC + ABC) is:

C + (A ⊕ B)

(A + B + C)(A + B + C)

(A + B + C)(A + B + C)(A + B + C)

(A + B + C)(A + B + C)(A + B + C)

⇒ In integral cycle control of ac regulator, the input power factor is equal to

duty cycle a

a

^{2}

a

(a)

^{1/3}

⇒ The magnitude plot of a rational transfer function G(

*s*) with real coefficients is shown below. Which of the following compensators has such a magnitude p

Lead compensator

Lag compensator

PID compensator

Lead-lag compensator

⇒ A hertzian dipole has a radiation pattern with

a null in the direction of the dipole

a null in the plane perpendicular to the dipole

a peak in the direction of the dipole

none of the above

⇒ In the given figure the E and H lines in a coaxial c

The radial lines are E lines and circular lines are H lines

Radial lines are H lines and circular lines are E lines

The directions of E and H lines are wrong

Radial lines may be E and H lines depending an direction of current

⇒ In a colour TV receiver AFT stands for

Automatic Fine Tuning

Automatic Frequency Tuning

Automatic Field Tuning

Alignment Frequency Tuning

⇒ The direction of rotation of a CD is

clockwise

anticlockwise

clockwise or anticlockwise depending on frequency of data stored

mostly anticlockwise but some times clockwise

⇒ Which of the following is wrong for a magic used to tee?

E and H arms are decoupled

coplanar arms are coupled

all ports are perfectly matched

A signal into coplanar arm splits equally between E and H arms

⇒ If

*f*

_{1}(

*t*)<<

*F*(

_{1}*j*ω) and

*f*

_{2}(

*t*)↔ F

_{2}(

*j*ω), then [

*a*

_{1}

*f*

_{1}(

*t*) + a

_{2}

*f*

_{2}(

*t*)]↔

*a*

_{1}F

_{1}(

*j*ω) +

*a*

_{2}F

_{2}(

*j*ω)

*a*

_{1}

*a*

_{2}F

_{1}(

*j*ω) + F

_{2}(

*j*ω)

*a*

_{1}F

_{1}(

*j*ω) -

*a*

_{2}F

_{2}(

*j*ω)

*a*

_{1}F

_{1}*(

*j*ω) +

*a*

_{2}F

_{2}*(

*j*ω)

⇒

Match the following:

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

A. | Multiplexer | 1. | Sequential memory |

B. | De-multiplexer | 2. | Converts decimal number to binary |

C. | Shift register | 3. | Data selector |

D. | Encoder | 4. | Routes single input to many outputs |

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

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

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

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

⇒ Consider a baseband binary PAM receiver shown below. The additive channel noise

*n*(

*t*) is whit with power spectral density S

_{N}(

*f*) = N

_{0}/2 = 10

^{-20}W/Hz. The low-pass filter is ideal with unity gain and cutoff frequency 1 MHz. Let Y

_{k}represent the random variable

*y*(

*t*

0.5 x

0.5 x

0.5 x

_{k}0.5 x*e*^{-3.5}0.5 x

*e*^{-5}0.5 x

*e*^{-7}0.5 x

*e*^{-10}

⇒ Consider the following functions

1, 2 and 3

1, 2, 3 and 4

1 and 2

1, 2 and 4

⇒ It is necessary to measure the amplitudes of two signals and also the phase difference between them. This can be done by using a

phase meter

waveform meter

vector voltmeter

digital voltmeter

⇒ The depletion layer around

hole

electron

immobile charges

none of the above

⇒ The circuit shown in figure will ac

differentiator

adder

clipper

clamper

⇒ Current having waveform in figure flows through 10 Ω resistance. Average powe

1000 W

500 W

333.3 W

250 W

⇒ The image frequency of a superheterodyne receiver is

created within the receiver itself

not rejected by IF tuned circuits

independent of the frequency of tuning

due to insufficient adjacent channel rejection

⇒ When the light falling on a photodiode increases, the reverse minority current

increases

increases or decreases

decreases

remains the same

⇒ Absolute permeability (μ) is given by __________ henry/metre

4p x 10

4p x 10

8.854 x 10

8.854 x 10

⇒ (29)

11

12

13

16

⇒ If a two port network is represented by an equivalent T network, the impedance of shunt arm in terms of ABCD parameters is equal to

1/C

(A - 1)/C

1/B

(D - 1)/C

⇒ Consider the following functions

- It detects the AM video carrier IF so as to produce the video signal
- It produces and separates out the inter carrier sound IF of 5.5 MHz
- It amplifies the video signal
- It amplifies the audio signal

1, 2 and 3

1, 2, 3 and 4

1 and 2

1, 2 and 4

⇒ It is necessary to measure the amplitudes of two signals and also the phase difference between them. This can be done by using a

phase meter

waveform meter

vector voltmeter

digital voltmeter

⇒ The depletion layer around

*p*-*n*junction in JFET consists ofhole

electron

immobile charges

none of the above

⇒ The circuit shown in figure will ac

differentiator

adder

clipper

clamper

⇒ Current having waveform in figure flows through 10 Ω resistance. Average powe

1000 W

500 W

333.3 W

250 W

⇒ The image frequency of a superheterodyne receiver is

created within the receiver itself

not rejected by IF tuned circuits

independent of the frequency of tuning

due to insufficient adjacent channel rejection

⇒ When the light falling on a photodiode increases, the reverse minority current

increases

increases or decreases

decreases

remains the same

⇒ Absolute permeability (μ) is given by __________ henry/metre

4p x 10

^{-12}4p x 10

^{-7}8.854 x 10

^{-12}8.854 x 10

^{-7}⇒ (29)

_{13}÷ (29)_{12}x (29)_{x}= (23)_{16}Find*x*11

12

13

16

⇒ If a two port network is represented by an equivalent T network, the impedance of shunt arm in terms of ABCD parameters is equal to

1/C

(A - 1)/C

1/B

(D - 1)/C