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. | Laplace transform of unit doublet is |

A. | 1/s [Wrong Answer] |

B. | s^{2} [Wrong Answer] |

C. | s [Correct Answer] |

D. | none [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 S (sign) flag is set when the contents of accumulator become negative during an operation.

TRUE

FALSE

⇒ V-I relationship of a network N is given by, V = 8 -

0, 2

0, 4

2, 4

None of these

⇒ If L [

*f*(

*t*)] = F(

*s*), L

*f*(

*t*- T)

*e*

^{sT}F(

*s*)

*e*

^{-sT}F(

*s*)

F(

*s*) -

*e*

^{-sT}

F(

*s*) +

*e*

^{-sT}

⇒ Curl of gradient A is

∇ x (∇A) = 1

∇ x (∇A) = ∞

∇ x (∇A) = 0

∇ x (∇A) = - ∞

⇒ A multivibrator generates

sinusoidal waveforms

non-sinusoidal waveforms

both (a) and (b)

none of the above

⇒ A uniform plane wave in the free space is normally incident on an infinitely thick dielectric slab (dielectric constant ε

*= 9). The magnitude of the reflection coefficient is*

_{r}0

0.3

0.5

0.8

⇒ An electron for which

*l*= 0 has zero orbital magnetic dipole moment.

TRUE

FALSE

⇒ Hysteresis loss in a transformer working at 220 V and at a frequency of 50 Hz is 100 W. When the transformer is operated at 220 V and at a frequency of 100 Hz, what is the hysteresis loss?

50 W

100 W

200 W

400 W

⇒ A 4 input AND gate is equivalent to

4 switches in parallel

2 switches in series and 2 in parallel

three switches in parallel and one in series

4 switches in series

⇒ The modulation index of an FM is changed from 0 to 1. How does the transmitted power change?

Gets halved

Gets doubled

Gets increased by 50 percent

Remains unchanged

⇒ Consider the following rectifier circuits :

- half-wave rectifier without filter
- full-wave rectifier without filter
- full-wave rectifier with series inductance filter
- full-wave rectifier with capacitance filter.

1, 2, 3, 4

3, 4, 1, 2

1, 4, 3, 2

3, 2, 1, 4

⇒ As per Euler's identity

*e*

^{jωt}= cos ω

*t*+

*j*sin ω

*t*

TRUE

FALSE

⇒ A lag compensator is essentially a

low pass filter

high pass filter

band pass filter

either (a) or (b)

⇒ As regards single phase dual converter

the change in operation from one quadrant to the other is faster in non-circulating current mode

the change in operation from one quadrant to the other is faster in circulating current mode

the time response to change in operation from one quadrant to other is the same in both the modes

the time response to change in operation from one quadrant to the other may be faster in any of the two modes

⇒ Algebraic expression for

*z*-transform of

*x*[

*n*] is X[

*z*]... What is the algebraic expression of

*z*-transform of

*e*

^{jω0n}

*x*[

*n*]?

X(Z - Z

_{0})

X(

*e*

^{-jW0z})

X(

*e*

^{jω0z})

X(Z)

^{jω0z}

⇒ Which of the following is the software for financial accounting?

COBOL

MS WORD

Page maker

DB III plus

⇒ Which of the following devices has metal-silicon junction?

General purpose power diode

Schottky diode

SCR

MOSFET

⇒ In the given figure

*f*(

*t*) is an even funct

TRUE

FALSE

⇒ Consider the following statements:

- Acceptor level is formed very close to the conduction band.
- The effective mass of the free electron is same as that of a hole.
- The magnitude of the charge of a free electron is same as that of a hole.
- Addition of donor impurities adds holes to the semiconductor.

1 and 3

2 and 3

2 and 4

3 and 4

⇒ Consider the following stateme

1 and 2

2 and 3

3 and 4

4 and 5

⇒ A uniform plane wave travelling in air is incident on the plane boundary between air and another dielectric medium with e

*= 15. The reflection coefficient for normal incidence is*

_{r}0.6 ∠0°

1 ∠0°

0.6 ∠180°

1.2 ∠180°

⇒

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

⇒ Harmonic distortion analyser

measures amplitude of each harmonic

measures rms value of fundamental frequency component

measures rms value of all harmonics except fundamental frequency

displays rms value of each harmonic on screen of CRO

⇒ In the vacuum diode equation

*i*

_{b}=

*ke*

_{b}

^{1.5}, the current is

temperature limited current

space charge limited current

any of the above

none of the above

⇒ If the intrinsic resistivity at 300°K is 0.37

*ohm-m*and the electron and hole mobilities at 300°K are 0.28 and 0.15

*m*

^{2}/volt-sec, then the intrinsic carrier concentration of Germanium is __________ .

2.92 x 10

^{19}/

*m*

^{3}

2.92 x 10

^{-19}/

*m*

^{3}

1.92 x 10

^{19}/

*m*

^{3}

3.92 x 10

^{19}/

*m*

^{3}

⇒ A broadside array operating at 100 cm wavelength consist of 4 half-wave dipoles spaced 50 cm apart. Each element carries radio frequency current in the same phase and of magnitude 0.5 A. The radiated power will be

196 W

73 W

36.5 W

18.25 W

⇒ In a discharging R-L circuit voltage across the resistor exhibits

a linear rise

a linear decay

an exponential growth function

an exponential decay function

⇒ While keeping the down-link frequency constant, the diameter of a satellite antenna is reduced by half. To offer the same EIRP over the increased coverage area, the

*RF*output power has to be increases by a factor of

2

4

8

16

⇒ Which of the following best represents the bandwidth of an actual op-amp?

100 Hz to 1 MHz

0 Hz to 100 kHz

0 Hz to 10 MHz

0 Hz to infinity

⇒ In an

*n*channel JFET, the gate is

*n*type

*p*type

either

*n*or

*p*

partially

*n*& partially

*p*