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Q1. | A signum function is |

A. | zero for t greater than zero [Wrong Answer] |

B. | zero for t less than zero [Wrong Answer] |

C. | unity for t greater than zero [Wrong Answer] |

D. | 2∪(t) - 1 [Correct Answer] |

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

⇒ The leads in a TRIAC are denoted by

anode cathode, gate

T

_{1}T

_{2}, gate

T

_{1}, T

_{2}, anode

T

_{1}, T

_{2}, T

_{3}

⇒

Match the following:

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

A. | Reactance theorem | 1. | Foster |

B. | Driving point impedance | 2. | Bartlett |

C. | Continued fraction expansion | 3. | Cauer |

D. | Bisection Theorem | 4. | Positive real function |

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

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

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

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

⇒ It

*f*(

*t*) is an odd function, the coefficients F

*in the exponential form of Fourier series*

_{n}are real

are imaginary

are complex

may be real or imaginary

⇒ The depletion layer across a P

^{+}

*n*junction lies

mostly in the P

^{+}region

mostly in

*n*region

equally in both the P

^{+}and

*n*-region

entirely in the P

^{+}region

⇒ For Disk partitioning th DOS command is

F DISK

H DISK

A DISK

D DISK

⇒ The reactance of coupling capacitor for AC signals in an amplifier, should be

as low as possible

as high as possible

neither low nor high

either low or high

⇒

Match the following:

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

A. | Silicon | 1. | Donor Impurity |

B. | Antimony | 2. | Acceptor Impurity |

C. | Gallium | 3. | Most Commonly used semiconductor material |

D. | Germanium | 4. | Atomic number 32 |

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

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

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

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

⇒ For the two port of figure,

*z*

_{1126/7 Ω10/3 Ω6 Ω2 Ω}

⇒ The Fourier transform of

*f*(

*t*) = cos ω

_{0}

*t*is

p[δω

_{0}+ δ(- ω

_{0})]

p[δ(ω - ω

_{0}) + δ(ω + ω

_{0})]

p[δω

_{0}- δ(- ω

_{0})]

p[δ(ω - ω

_{0}) - δ(ω + ω

_{0})]

⇒ In FORTRAN 77 FLOAT (-28) gives the value

28

-28

-28

none of the above

⇒ In figure as the load resistance is cha

the zener current remain constant

the load current remains constant

the output voltage remains constant

the output voltage and current through

*R*remain constant

⇒ In a varistor, as the voltage increases beyond a certain value, its resistance

rapidly increases

rapidly decreases

becomes negative, i.e., varistor goes into negative resistance region

none of these

⇒ FORTRAN expression for 3

*b*

^{2}-5

*a*

^{2}is

SQRT (3 * B ** 2 - 5 * A ** 2)

SQRT 3 * B ** 2 - 5 * A ** 2

SQRT (3 * b ** 2 - 5 * a ** 2)

SQRT (3 * B ** 2) - SQRT (5 * A **2)

⇒ Which of the following is best suited for parity checking and parity generation?

AND, OR, NOT gates

XOR, Exclusive NOR gate

NAND gates

NOR gates

⇒ The frequencies in ultra high frequency range are propagated by means of __________ waves

surface

ground

sky

space

⇒ As compared to LED, LASER has

- higher emission efficiency
- no tuning arrangement
- narrow spectral width
- provision for confinement

1, 2, 3 are correct

1, 2, 4 are correct

1 and 3 are correct

1, 3, 4 are correct

⇒ An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. What percentage of feedback will cause oscillations?

0.001

0.005

0.01

0.02

⇒ To measure a resistance of about 8 ohms we should use

Kelvin's double bridge

Wheatstone bridge

Meggar

Either (b) or (c)

⇒ Consider the sequence

*x*[

*n*] = [- 4 -

*j*5 1 + J2 4]

[- 4 - J2.5 J2 4 -

*J*2.5]

[- J2.5 1 J2.5]

[- J5 J2 0]

[-

*x*1 4]

⇒ For the characteristic equation

*s*

^{5}+

*s*

^{4}+ 2

*s*

^{3}+ 2

*s*

^{2}+ 3

*s*+ 15 = 0, the number of roots in left half

*s*plane are

1

2

3

5

⇒ It is desired to reduce distortion in an amplifier from 8% to 2% by using 5% negative feedback. The open and closed loop gains respectively are

60 and 15

15 and 60

6 and 1.5

1.5 and 6

⇒ A parallel resonant circuit can be used

as a high impedance

to reject a small band of frequencies

both (a) and (b)

to amplify certain frequencies

⇒ If the transfer function has zeros only on

*j*ω axis or in left half plane, it is a minimum phase function.

TRUE

FALSE

⇒ Master control facility (MCF) for INSAT-2 series satellites is located at

Madras

New Delhi

Leh

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⇒ Which of the following is not considered as a useful quantity in comparing noise performance of receivers?

Noise temperature

Noise figure

Noise resistance

Input noise voltage

⇒ In the graphical analysis of CE amplifier circuit, the intersection of base current and dc load line is called

saturation point

cut off point

Q point

operating point

⇒ The EHT voltage in a picture tube of TV is

about 1000 kV

about 100 kV

about 15 kV

about 1 kV

⇒ Which of the following antennas uses a number of varying length parallel elements?

Helical antenna

Pyramidal Horn

Comer reflection antenna

Yagi-Uda antenna

⇒ In 180° mode of operation of a 3 phase bridge inverter, two thyristors conduct at one time.

TRUE

FALSE

⇒

**Assertion (A):** Gunn diode is a transferred electron device.

**Reason (R):** A Gunn oscillator uses the phenomenon of transferred electron effect.

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

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

A is correct but R is wrong

A is wrong but R is correct