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Q1. | Efficiency of class A power amplifier is very poor. |

A. | TRUE [Correct Answer] |

B. | FALSE [Wrong Answer] |

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

⇒ The function δ (

*t*-

*b*) is a

unit impulse

unit step

unit doublet

none of the above

⇒ If the absolute value of a number is less than decimal 1, the sign of exponent in floating point representation is

zero

negative

zero or negative

positive

⇒ The simplified logic expression for the circuit of the given figur

Y = A

Y = AB

Y = A + B

Y + A + B

⇒ If V

_{in}is 0.99 V, what is the digital output of the ADC 0801 after INTER goes low?

0011 0011

0101 1111

0111 1100

1111 1111

⇒ A parallel plate capacitor with air as dielectric has a capacitance C. If the dielectric has a dielectric constant ∈

_{r}and the remaining dimensions are the same, the capacitance will be

C/∈

_{r}

∈

_{r}C

∈

^{2}

_{r}C

∈

^{3}

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⇒ If N bits are lumped together to get an N-bit symbol, the possible number of symbols is

2

^{N}

2

^{N - 1}

2

^{N - 2}

2

^{N - 4}

⇒ If the frequency is less than the damped frequency in a series- inverter

the distortion of output voltage waveform is low

the distortion of output voltage waveform is high

the distortion of output voltage may be high or low depending on the load impedance

none of the above

⇒ Which of the following are included in the architecture of computer?

- Addressing mode, design of CPU
- Instruction set, data format
- Secondary memory, operating system

1 and 2

2 and 3

1 and 3

1, 2 and 3

⇒ Elements R, L, C are connected in parallel and excited by a dc current I. If

*i*

_{R},

*i*

_{L}and

*i*

_{C}are the currents through R, L, C respectively then at

*t*= 0

*i*

_{R}>

*i*

_{L}>

*i*

_{C}

*i*

_{L}>

*i*

_{R}>

*i*

_{C}

*i*

_{C}= 0

*i*

_{C}= I

⇒ Which gives minimum probability of error?

ASK

FSK

PSK

DPSK

⇒ A capacitor can be represented by a capacitance C in parallel with a resistance R. For a good capacitor, the resistance R should be

very high

high

very low

low

⇒ Fermi level in intrinsic semiconductor is at the centre of forbidden energy band.

TRUE

FALSE

⇒ Tuned amplifiers are used at radio frequencies.

TRUE

FALSE

⇒ Which of the following is not necessarily the advantages of a push pull amplifier?

It gives more output

It removes odd a well as even harmonics

There is no effect of ripple of the power supply

It consumes least power

⇒ Computers use thousands of flip-flops. To coordinate the overall action, a common signal is sent to all flip-flop known as

debug signal

toggle signal

active signal

clock signal

⇒ The effective channel length of a MOSFET in saturation decreases with increase in

gate voltage

drain voltage

source voltage

body voltage

⇒ The pre-emphasis circuit is used

prior to modulation

after demodulation

for low frequency components of the signal

none of the above

⇒ In a communication system, noise is most likely to affect the signal

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at the transmitter

at the information source

in the channel

⇒ If X = - 285.56 and the Pascal write statement used is

`WRITE (X : 8).`

Then the print out will appear as-285.56

-2.85 E + 02

-2.85560 E + 02

-2.8 E + 02

⇒

**Assertion (A):** Moving iron instrument can be used on ac or dc.

**Reason (R):** In a moving iron instrument deflecting torque is proportional to square of current.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true R is false

A is false R is true

⇒ The Clapp oscillator shown in figure will operat

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46 kHz

460 kHz

4600 kHz

⇒ A TV. transmitting aerial is fixed on top of a 150 metre tower located on a mountain 1200 m height. The range of transmitter is

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152 km

152 m

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⇒ A m

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*ms*

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⇒ Intel 2004 is a

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⇒ A single mode fibre not suffer from which type of dispersion?

Waveguide dispersion

Material dispersion

Intermodal dispersion

Polarization mode dispersion

⇒

Match the following:

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

A. | Evanescent wave | 1. | Pattern multiplication |

B. | Skip distance | 2. | Mismatched transmission line |

C. | Return loss | 3. | Propagation in lossy medium |

D. | Antenna array | 4. | Short wave propagation |

5. | Propagation below cut-off |

A-5, B-2, C-4, D-3

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

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

A-1, B-3, C-4, D-5

⇒ If I = J = K = 13, then in Fortran 1 = 10 - (1 / 10) * 10 + (J / 5) * 4 + K ** (- 2) is equal to

8

7

6

5

⇒ A sinusoidal carrier voltage, having frequency 1000 Hz is amplitude modulated by a sinusoidal voltage of frequency 15 kHz. The frequency of upper and lower sidebands will be

1015 kHz and 985 kHz

1030 kHz and 970 kHz

13 kHz and 17 kHz

14 kHz and 16 kHz

⇒ If a function

*f*(

*t*) is an odd, function, its Fourier series

contains only sine terms

contains only cosine terms

contains a constant and sine terms

contains a constant and cosine

⇒ The current

*i*(

*t*), though a 10 Ω resistor in series with an inductance, is given by

*i*(

*t*) = 3 + 4 sin (10

*t*+ 45°) + 4 sin (300

*t*+ 60°) Amperes. The RMS value of the current and the power dissipated in the circuit are

41 A, 410 W, respectively

35 A, 350 W, respectively

5 A, 250 W, respectively

11 A, 1210 W, respectively