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. | A narrow band FM does not have the following feature |

A. | it has two sidebands [Wrong Answer] |

B. | both sideband equal in magnitude [Wrong Answer] |

C. | both sideband have same Phase Difference [Correct Answer] |

D. | it does not show Amplitude variation [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 maximum power dissipation capacity of a transistor is 50 mW. If the collector emitter voltage is 10 V, what is the safe collector current that can be allowed through the transistor?

5 mA

2.5 mA

10 mA

25 mA

⇒ For a nonlinear resistance

*v*-

*i*plot is not a straight line

resistance increases as current increases

resistance decreases as current increases

current decreases as voltage increases

⇒ The leakage current in CB configuration may be around

few micro amperes

few hundred micro amperes

few milliamperes

few hundred milliamperes

⇒ 2's complement of a given 3 or more bit number of non-zero magnitude is the same as the original number if all bits except

MSB are zero

LSB are zero

MSB are 1

LSB are 1

⇒ In TE

_{10 }mode the largest electric field in a rectangular wave guide, occurs

along centre line of broad wall (

*i*.

*e*.

*x*=

*a*/2)

along the broad wall (

*i*.

*e*.

*x*= 0 and

*x*=

*a*)

either (a) or (b)

neither (a) nor (b)

⇒ The current due to thermionic emission is given by Richardson Dushman equation.

TRUE

FALSE

⇒ Which of the following plot can be directly used to determine β?

V

_{CE}versus

*i*

_{C}for constant I

_{B}

V

_{BE}versus

*i*

_{B}for constant V

_{CE}

V

_{CB}versus

*i*

_{C}for constant I

_{B}

All of the above

⇒ Which one of the following is the correct statement of the system characterized by the equation

*y*(

*t*) =

*a*

*x*(

*t*) +

*b*?

linear for any value of

*b*

linear if

*b*> 0

linear if

*b*< 0

non-linear

⇒ The sum of two or more arbitrary sinusoidal is

always periodic

periodic under certain conditions

never periodic

periodic only if all the sinusoidals are identical in frequency and phase

⇒ In a J-K flip flop the input J = K = 1 pulse is about

set

reset

no change

toggle

⇒ A silicon sample A is doped with 10

^{18}Atoms/cm

^{3}of Boron. Another sample B of identical dimensions is doped with 10

^{18}atoms/cm

^{3}of phosphorus. The ratio of electron to hole mobility is 3. The ratio of conductivity of the sample A to B is

3

42738

42769

42796

⇒ (9)

_{11}x (9)

_{13}x(9)

_{15}= (?)

_{16}

933

2D9

339

9AB

⇒ As per Hall effect, if any specimen carrying a current I is applied in a transverse magnetic field B, then an electric field E is induced in the specimen in the direction.

parallel to I

perpendicular to B and parallel to I

parallel to I and B

perpendicular to both I and B

⇒

Match the following:

List I (Diode Rectifier) | List II (Efficiency is R_{f}/R_{L} = 0.25) | ||
---|---|---|---|

A. | Half wave | 1. | 0.54 |

B. | Bridge Rectifier | 2. | 0.65 |

C. | Full wave using tapped centre transformer | 3. | 0.325 |

A-1, B-2, C-3

A-2, B-1, C-3

A-3, B-2, C-1

A-3, B-1, C-2

⇒ For a semiconductor, the conductivity is a function of the products of the number of charge carriers and their mobilites. As result, if the temperature of a slab of intrinsic silicon increases, how does its conductivity vary?

Decreases

Increases

Remains unaffected

Increases or decreases depending upon the rise in temperature

⇒ The gain margin for a stable system

has a positive decibel value

has a negative decibel value

has a large negative decibel value

none of the above

⇒ An MTI radar operating at 5 GHz has a PRF of 800 pps. The lowest blind speed is

48 m/s

96 m/s

192 m/s

24 m/s

⇒ The Voltage

*e*

_{0}in the figu

2 V

4 V

4/3 V

8 V

⇒ In figure, I

_{D}= 4 mA. Then V

_{D20 V10 V30 V1 V}

⇒ In a circuit containing a complex impedance, maximum power transfer takes place when load is

pure resistance

equal to the complex impedance

conjugate complex of the circuit impedance

none of the above

⇒ The number of PM radio channels which can be accommodated in a spectrum of 300 MHz is about

10

100

500

1500

⇒ In filter system of sideband suppression the advantage of using mechanical filter is

smaller size

good bandpass

good attenuation characteristics

all of the above

⇒ The phase angle characteristic in the given figure is

all pass function

transport lag

minimum phase function

none of the above

⇒ In a phase discriminator

*f*, is the IF to which primary circuit is tuned. Consider the following statements: The primary and secondary voltages are

_{c}- exactly 90° out of phase when input frequency is
*f*_{c} - more than 90° out of phase when input frequency is higher than
*f*_{c} - less than 90° out of phase when input frequency is lower than
*f*_{c}

1 only

1 and 2

1, 2 and 3

2 and 3

⇒ When satellite radio beam is aimed towards earth, it illuminates on the earth for an oval shaped area called

foot print

beam area

satellite service area

radiated area

⇒ The load circuit of a single phase full bridge inverter

must be underdamped

must be overdamped

may be underdamped or overdamped

may be any type of load

⇒ What does the operator ( ) mean in C?

Function expression

Array expression

Structure operator

Increment / Decrement

⇒ For maximum transfer of power, internal resistance of the source should be

equal to load resistance

less than the load resistance

greater than the load resistance

none of the above

⇒ A frequency doubler has an FM signal input at 13 MHz with a deviation of 5 kHz. The output, frequency for the carrier will be

26 MHz

26.1 MHz

10 kHz

160 kHz

⇒ Choose proper substitutes for

*x*and

*y*to make the following statement corr

*x*: Reverse,

*y*: Reverse

*x*: Reverse,

*y*: forward

*x*: Forward,

*y*: Reverse

*x*: forward,

*y*: forward