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Q1. | The value of capacitor C for dynamic equalising circuit of series connected thyristors is determined by |

A. | forward characteristics of thyristors [Wrong Answer] |

B. | reverse recovery characteristics of thyristors [Correct Answer] |

C. | both forward and reverse recovery characteristics of thyristors [Wrong Answer] |

D. | none of the above [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 :**

⇒ In TE and TM modes of rectangular waveguides having propagation in

*z*direction

E

_{z}and H

_{z}are both zero

In TE mode E

_{z}is zero and in TM mode H

_{z}is zero

In TE mode H

_{z}is zero and in TM mode E

_{z}is zero

In both TE and TM modes both E

_{z}and H

_{z}are non-zero

⇒ The impulse response

*h*(

*t*) of a linear invariant continuous time system is given by h(

*t*) = exp (- 2

*t*)

*u*(

*t*), where

*u*(

*t*) denotes the unit step function. The output of this system to the sinusoidal input

*x*(

*t*) = 2cos(2

*t*) for all time

*t*, is

0

2

^{-0.25}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.125p)

2

^{-0.5}cos (2

*t*- 0.25p)

⇒ Wagner earthing device is used to eliminate error due to

electromagnetic coupling

electrostatic coupling

both electrostatic and electromagnetic coupling

either (a) or (b)

⇒

Match the following:

List I (Application of circuit) | List II (Circuit Name) | ||
---|---|---|---|

A. | Divider | 1. | Astable multivibrator |

B. | Clips input voltage at two predetermined levels | 2. | Schmitt trigger |

C. | Square wave generator | 3. | Bistable multivibrator |

D. | Narrow current pulse generator |

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

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

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

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

⇒ ALE stands for

Address Latch Enable

Accumulator Latch Enter

Address Latch Enter

Accumulator Latch Enable

⇒ The force in a magnetic field is given by F =

*qv*B

F and

*q*are perpendicular and

*v*and B are perpendicular

F and

*q*only are perpendicular to each other

F and

*v*, F and B are mutually perpendicular to each other and

*v*and B at any angle between them

All the four components are perpendicular to each other

⇒

Match the following:

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

A. | CTFS | 1. | Periodic |

B. | DTFS | 2. | Non-periodic |

C. | CTFT | ||

D. | DTFT |

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

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

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

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

⇒ A photoconductor is a

conductor

semiconductor

insulator

superconductor

⇒ The value of susceptibility in case of vacuum is taken as

zero

0.5

unity

infinity

⇒ In a hi-fi system the frequency response over the audio frequency range should be within

± 10 dB

5 dB

2 dB

1 dB

⇒ Consider the following circuit configuration

- common Emitter
- common Base
- emitter follower
- emitter follower using Darlington pair.

2, 1, 4, 3

1, 2, 4, 3

2, 1, 3, 4

1, 2, 3, 4

⇒ A source generates three symbols with probabilities 0.25, 0.25, 0.50 at a rate of 3000 symbols per second. Assuming independent generation of symbols, the most efficient source encoder would have average bit rate is as

6000 bits/sec

4500 bits/sec

3000 bits/sec

1500 bits/sec

⇒ A voltage V(

*t*) which is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt

^{2}is measured by a true rms meter. The reading will be

0

4

2

16

⇒ If resistance is 20 Ω and inductance is 2 H in a R-L series circuit, then time constant of this will be

0.001

*s*

0.1

*s*

10

*s*

100

*s*

⇒

Match the following:

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

A. | DMA controller | 1. | Interface between computer and video display adapter |

B. | CKT controller | 2. | Used to read data directly from disk into directly memory |

C. | Interrupt controller | 3. | Supervises the operation of control signal |

A-1, B-2, C-3

A-2, B-3, C-1

A-3, B-2, C-1

A-2, B-1, C-3

⇒ In a CE amplifier, the collector resistance is 6 kΩ and load resistance is 3 kΩ. The ac load resistance is

9 kΩ

6 kΩ

3 kΩ

2 kΩ

⇒ In figure, the time constant for the capacitor chargin

6 μ

*s*

10 μ

*s*

15 μ

*s*

25 μ

*s*

⇒ Which of the following has highest resistivity?

Mica

Paraffin wax

Air

Mineral oil

⇒

**Assertion (A):** Nyquist stability criterion uses the number of encirclements around (-1 + *j*0) point in GH plane to determine stability

**Reason (R):** The (-1 + *j*0) point in the *s* plane lies in the Nyquist path.

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

R is correct but A is wrong

⇒ Which of the following bridges is also used in an oscillator?

Maxwell

Schering

Hay

Wien

⇒ The gain of a current element is

0 dB

1.67 dB

1.76 dB

3 dB

⇒ A binary ladder network D/A converter requires

resistors of one value only

resistors of many different values

resistors of two different values

none of the above

⇒ Entropies associated with an extremely unlikely message and that with an extremely likely message are respectively

0 and 0

1 and 1

1 and 0

0 and 1

⇒ A linear displacement digital transducer generally uses

straight binary code

BCD

gray code

hexadecimal code

⇒ A lossless transmission line with air dielectric is 6 m long. What is the line length at 30 MHz?

1 wavelength long

0.5 wavelength long

0.6 wavelength long

0.25 wavelength long

⇒ When a TTL is driving an CMOS gates it is necessary to ensure that

V

_{OL}(for TTL) ≤ V

_{IL}(for CMOS) and V

_{0H}(for TTL) ≥ VIH (for CMOS)

V

_{0L}(for TTL) ≥ V

_{IL}(for CMOS)

V

_{0H}(for TTL) ≤ V

_{IH}(for CMOS)

V

_{0L}(for TTL) ≥ V

_{IL}(for CMOS) and V

_{0H}(for TTL) ≤ VIH (for CMOS)

⇒

**Assertion (A):** In Fortran 77 the statement `IMPLICIT INTEGER (A - E)`

identifies all variable name which begin with A, B, C, D, or E as being of integer type.

**Reason (R):** `IMPICIT`

statement in Fortran 77 is an improvement over earlier versions of Fortran.

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 R is wrong

A is wrong R is correct

⇒ The gain of an antenna with a circular aperture of diameter 3 metres at a frequency of 5 GHz, will be

2.4674

24.674

246.74

24674

⇒ An antenna is considered to be in free space where its height above the ground is

λ

2λ

less than 3λ

more than 5λ

⇒ The hexadecimal number system is

widely used in analyzing and programming microprocessors

an obsolete system no more in use

used in calculators only

none of the above