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. | If f(t)↔ F(jω), and f(t) is real, then F(- jω) |

A. | F(jω) [Wrong Answer] |

B. | F*(j↔) [Correct Answer] |

C. | F*(- jω) [Wrong Answer] |

D. | none of these [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss 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 :**

⇒ An increase of reverse voltage decreases the junction capacitance.

TRUE

FALSE

⇒ The O/P Power of a power amplifier is several times its input power. It is possible because

power amplifier introduces a -ve resistance

there is +ve feed back in the circuit

step up transformer is use in the circuit

power amplifier converts a part of I/P d.c. power into a.c. power

⇒ Dielectric constant, under the condition of alternating fields, is a complex quantity.

TRUE

FALSE

⇒ A series RLC circuit is supplied from a variable frequency ac source. The resonant frequency is ω

_{0}. The voltage across C is maximum at a frequency

equal to ω

_{0}

slightly less than ω

_{0}

slightly more than ω

_{0}

none of the above

⇒ Wire-wound resistors are unsuitable for use at high frequencies because they

are likely to melt under excessive eddy current heat

exhibit unwanted inductive and capacitive effects

create more electrical noise

consume more power

⇒ In hexadecimal number system, A is equal to decimal number

10

11

17

18

⇒ Which of the following waves do not exist in waveguides?

TE waves

TM waves

TE and TM waves

TEM waves

⇒ In position control system the device used for providing rate feedback voltage is

potentiometer

synchro-transmitter

synchro-transformer

tacho generator

⇒ The pressure coil of a wattmeter should be connected to the supply side of the current coil when

load impedance in high

load impedance is low

voltage is high

voltage is low

⇒ An RC series circuit is charged by a voltage E. After a long time the battery is removed and a short circuit is placed across R-C. Then

the polarity of voltage across R is same during discharge and during charge

the polarity of voltage across R during discharging is opposite to that during charging

the polarity of voltage across R depends on time constant RC

none of the above

⇒ The diffusion current is proportional to

applied electric field

concentration gradient of charge carrier

square of the electric field

cube of the applied electric field

⇒ In an R-S latch, race condition occurs when

R is low and S is high

R and S are high

R and S are low

R is high and S is low

⇒ Which one of the following circuits is used for converting a sine wave into a square wave?

Astable multivibration

Monostable multivibration

Bistable multivibration

Schmitt trigger

⇒ The output V

_{0}in figur

-100 V

-100 mV

10 V

10 mV

⇒ A small signal source

*v*(

_{i}*t*) = A cos 20

*t*+ B sin10

^{6}

*t*is applied to a transistor amplifier as shown below. The transistor has β = 150 and

*h*= 3 kΩ. Which expression best approximates V

_{ie}_{0}(

*t<*

v

v

v

V

v

_{0}(*t*) = -1500 (A cos 20*t*+ B sin 10^{6}*t*)v

_{0}(*t*) = -150 (A cos 20*t*+ B sin 10^{6}*t*)v

_{0}(*t*) = -1500 B sin 10^{6}*t*V

_{0}(*t*) = -1500 sin 10^{6}*t*

⇒ The fabrication of microstrip line is done by

photo etching

printed circuit technique

oxidation

cladding

⇒ The Z-inverse of the given Z-transform is _______

unit step

unit ramp

unit impulse

unit parabola

⇒

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

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

A is true but R is false

A is false but R is true

⇒ At resonance, the parallel circuit constituted by an iron-cored coil and a capacitor behaves

open circuit

short circuit

pure resistor of value R

pure resistor of value much higher than R

⇒ The feedback resistance r

1000 MΩ

1 MΩ

1 KΩ

100 Ω

⇒ The number of address lines in EPROM 4096 x 8 is

2

4

8

12

⇒ In ferromagnetic materials, the orientation between neighbouring permanent dipoles is parallel.

TRUE

FALSE

⇒ The energy of constant amplitude complex valued exponential sequence is ...

A

∞

1

0

⇒ Logic analyser is

a multichannel oscilloscope

similar to logic pulser

similar to current tracer

none of the above

⇒ A better SNR can be obtained in a PCM by

increasing sampling rate above Nyquist rate

decreasing the code bits

reducing channel bandwidth

increasing Quantization levels

⇒ The operator precedence in Java is in the order

arithmetic operation, increment and decrement operation, comprassion, logical operation and assignment operation.

increment and decrement operation, arithmetic operation, comparison, logical operation and assignment operation.

comparison, arithmetic operation, increment and decrement operation, logical operation and assignment operation.

arithmetic operation, comparison operation, increment and decrement operation, logical operation and assignment operation.

⇒ What does the B register contain after the first MOV B, A has been executed?

40 H

60 H

80 H

80 D

⇒ The current flowing through the resistance R in the circuit in the figure has the form 2 cos 4

(0.18 +

(0.46 +

- (0.18 +

(0.23 - 0.35

⇒ Which of the following statements is correct?

Convex lens has positive focal power and concave lens have negative focal power

Convex lens has negative focal power and concave lens have positive focal power

All lens have positive focal power

All lens have negative focal power

⇒

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

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

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

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

⇒ The fabrication of microstrip line is done by

photo etching

printed circuit technique

oxidation

cladding

⇒ The Z-inverse of the given Z-transform is _______

unit step

unit ramp

unit impulse

unit parabola

⇒

**Assertion (A):** When *p*-*n* junction is forward biased, steady current flows.

**Reason (R):** When a *p*-*n* junction is forward biased, free electrons cross the junction from *n* to *p* and holes from *p* to *n*.

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

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

A is true but R is false

A is false but R is true

⇒ At resonance, the parallel circuit constituted by an iron-cored coil and a capacitor behaves

open circuit

short circuit

pure resistor of value R

pure resistor of value much higher than R

⇒ The feedback resistance r

_{d}in small signal model of MOSFET is of the order of1000 MΩ

1 MΩ

1 KΩ

100 Ω

⇒ The number of address lines in EPROM 4096 x 8 is

2

4

8

12

⇒ In ferromagnetic materials, the orientation between neighbouring permanent dipoles is parallel.

TRUE

FALSE

⇒ The energy of constant amplitude complex valued exponential sequence is ...

A

^{2}∞

1

0

⇒ Logic analyser is

a multichannel oscilloscope

similar to logic pulser

similar to current tracer

none of the above

⇒ A better SNR can be obtained in a PCM by

increasing sampling rate above Nyquist rate

decreasing the code bits

reducing channel bandwidth

increasing Quantization levels

⇒ The operator precedence in Java is in the order

arithmetic operation, increment and decrement operation, comprassion, logical operation and assignment operation.

increment and decrement operation, arithmetic operation, comparison, logical operation and assignment operation.

comparison, arithmetic operation, increment and decrement operation, logical operation and assignment operation.

arithmetic operation, comparison operation, increment and decrement operation, logical operation and assignment operation.

⇒ What does the B register contain after the first MOV B, A has been executed?

40 H

60 H

80 H

80 D

⇒ The current flowing through the resistance R in the circuit in the figure has the form 2 cos 4

*t*, where(0.18 +

*j*0.72)(0.46 +

*j*1.90)- (0.18 +

*j*1.90)(0.23 - 0.35

*j*)⇒ Which of the following statements is correct?

Convex lens has positive focal power and concave lens have negative focal power

Convex lens has negative focal power and concave lens have positive focal power

All lens have positive focal power

All lens have negative focal power

⇒

Match the following:

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

A. | Ternary | 1. | 0, 1, 3 |

B. | Quaternary | 2. | 0, 1, 2, 3, 4, 5, 6 7, 8, 9, A, B |

C. | Quinary | 3. | 0, 1, 2, 3, 4 |

D. | Duodecimal | 4. | 0, 1, 2 |

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

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

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

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