Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | Consider the amplitude modulated (AM) signal A cos ω_{c} + 2 cos ω_{c}t_{m}t cos ω For demodulating the signal using envelope detector, the minimum value of A_{c}t_{c} should be |

A. | 2 [Correct Answer] |

B. | 1 [Wrong Answer] |

C. | 0.5 [Wrong Answer] |

D. | 0 [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ Generally op amp is used in

open loop

closed loop

cascaded loop

either (a) or (c)

⇒ BCD equivalent of - 8

_{10}is

110

10110

11000

1000

⇒ In TV broadcast, UHF range is

606 - 790 MHz

100 - 150 MHz

41 - 68 MHz

174 - 230 MHz

⇒ Which one of the following is true?

Alternating voltage and current contain odd and even harmonics

The inductance in a circuit reduces the effect of harmonics and makes current wave more sinusoidal than voltage wave

Alternating voltage and current waveforms, in general, do not contain odd harmonics

Inductance of a circuit does not alter wave shape at all

⇒ Digital television is also called

High digital television

High definition television

High deflection television

High display television

⇒ Which of the following parameters is not specified for digital ICs?

Gate dissipation

Propagation delay

Noise margin

Bandwidth

⇒ The domain mode in rectangular waveguide is

TE

_{01}

TE

_{02}

TE

_{10}

TM

_{11}

⇒ A P-N junction diode dynamic conductance is directly proportional to

the applied voltage

the temperature

its current

thermal voltage

⇒ Which statement is incorrect for parallel resonance?

P.f. is 1

Y is minimum

B is zero

Z is minimum

⇒ CATV stands for

Common Antenna Television

Community Antenna Television

Cable Antenna Television

Channel Antenna Television

⇒ Consider the following DO statement in Fortran 77

10

3

4

⇒ Which of the following microphones is the cheapest?

Moving coil

Condenser

Ribbon

Carbon

⇒ BCD number 1100111 = __________

_{10}

66

67

68

69

⇒ The PC contains 0450 H and SP contains 08D 6 H. What will be content of P and SP following a CALL to subroutine at location 02 AFH?

0453 H, 08 D 8 H

0453 H, 08 D 4 H

02 AFH, 08 D 8 H

02 AFH, 08 D 4 H

⇒ Among the filter, Bessel, Butterworth and chebyshev, the filter with maximally flat response is

all

butterworth

bessel

butterworth, Chebyshev

⇒ To multiply a number by 8 in 8085 we have to use

`RAL`

instructiononce

twice

thrice

four times

⇒ Manganin, an alloy of copper and manganese, is used in

Soldering material

Heating elements

Ballast resistors

Standard resistances

⇒ If a function Z(

*s*) has a pole at infinity, then

the degrees of numerator and denominator are equal

the degree of numerator is one higher than that of denominator

the degree of denominator is one higher than that of numerator

the difference between the degrees of numerator and denominator is 0 or 1

⇒ Which of the following are voltage controlled devices?

Vacum triode

FET

SCR

Both (a) and (b)

⇒ Each frequency in the modulating wave gives rise to four side bands.

TRUE

FALSE

⇒ The ground waves eventually disappear as one moves away from the transmitter because of

tilting

maximum single-hop distance limitation

interference from the sky waves

loss of line-of sight condition

⇒ The effect of a finite gain of operational amplifier used in an integrator is that

it would not integrator

slope of the O/P will varied with time

final value of the O/P

there will be instability in the cirucuit

⇒ The use of thermocouple meters for ac measurement leads to a scale which is

linear

square law

logarithmic

exponential

⇒ Personal computer cannot be used for which one of the following?

Game playing

Weather forecasting

Office Automation

Home computing

⇒ 4 bit ripple counter and 4 bit synchronous counter are made using flip-flop having a propagation delay of 10 ns each. If the worst case delay in the ripple counter and the synchronous counter be R and S respectively, then

R = 10 ns, S = 40 ns

R = 40 ns, S = 10 ns

R = 10 ns, S = 30 ns

R = 30 ns, S = 10 ns

⇒ An increase in temperature increases the width of depletion layer.

TRUE

FALSE

⇒ In a multiphase chopper, the different choppers operate in

series and all simultaneously

parallel and one at a time

parallel and simultaneously

either (b) or (c)

⇒ A 4 bit parallel type A/D converter uses a 6 volt reference. How many comparators are required and what is the resolution in volts?

0.375 V

15 V

4.5 V

10 V

⇒ In a half wave diode rectifier circuit the current flows in the load circuit for

90° in each cycle

180° in each cycle

270° in each cycle

360° in each cycle

⇒ A transistor may fail due to

open weld at the wire leads to the semi-conductor

short circuit caused by momentary overloads

overheating due to circuit failures

any of the above