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Q1. | A static excitation system uses |

A. | transformer and thyristors [Correct Answer] |

B. | transformer and ac exciter [Wrong Answer] |

C. | dc exciter and ac exciter [Wrong Answer] |

D. | transformer and dc exciter [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒

**Assertion (A):** TTL uses multiple emitter transistor.

**Reason (R):** Multiple emitter transistors with about 60 emitters have been developed.

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 true, R is false

A is false, R is true

⇒ The V-

*i*relation for a varistor is

*i*=

*kv*

^{n}

*v*=

*ki*

^{n}

*i*=

*kv*

^{3}

*v*=

*ki*

^{3}

⇒ Temperature is analogous to

voltage

flux

charge

none of the above

⇒ In a N-type semi-conductor, the concentration of minority carriers is mainly depends on

the number of acceptor atoms

the number of donor atoms

the extent of doping

the temperature of the material

⇒ The system of the given fi

is unstable for all values of K

is stable for all values of K

can be stable for some values of K

data is insufficient to determine stability

⇒ Find the radiation resistance of an antenna of length λ/10 meter?

8 Ω

780 Ω

7.8 Ω

78 Ω

⇒ In which mode of rectangular waveguide are all field components zero?

TM

_{00}

TM

_{11}

TM

_{01}

TM

_{10}

⇒ If 4 in binary system is 100 then 8 will be

10

100

111

1000

⇒ In the given figure, the number of individual loop

2

4

5

6

⇒ Consider the following statements

- ECL has least propagation delay
- TTL has largest fan out
- CMOS has highest noise margin
- TTL has lowest power dissipation

1 and 3

2 and 4

3 and 4

1 and 2

⇒ The circuit shown depic

voltage series negative feedback

voltage shunt negative feedback

current series negative feedback

current shunt negative feedback

⇒ Which of the following Boolean algebra rules is correct?

A . A = 1

A + AB = A + B

A + A B = A + B

A(A + B) = B

⇒ IF V

_{CC}= 15 V, V

_{CEQ}= 5 V and I

_{CQ}= 50 mA, the efficiency in class A operation is

1

0.5

0.25

0.167

⇒ A memoryless source emits

*n*symbols each with a probability

*p*. The entropy of the source as a function of

*n*

increases as log

*n*

decreases as log (1/

*n*)

increases as

*n*

increases as

*n*log

*n*

⇒ The clock shown in figure has a frequency of 6 MHz. The frequency of the Q output wil

12 MHz

24 MHz

3 MHz

1.5 MHz

⇒ The minority carrier life time and diffusion constant in a semiconducting material are 100 μs and 100 cm

^{2}/s respectively. The diffusion length of carriers is

0.1 cm

0.01 cm

0.0141 cm

1 cm

⇒ Consider the following statements:

- In the 2's complement representation, negative numbers are stored in sign magnitude form.
- Taking 2's complement is equivalent to sign change.
- In a 4 bit complement representation of a binary number A.
- In the 2's complement representation the most significant bit (MSB) is zero for a positive number.

(I) and (III)

(I) and (IV)

(II) and (III)

(II) and (IV)

⇒ According to Siegel and Labus, antenna can be treated as

closed transmission line

shorted transmission line

earthed transmission line

opened-out transmission line

⇒ The capacitor filter provides poor voltage regulation because

the increase in ripple with load current causes a decrease in average voltage

the increase in ripple with load current causes a increase in average voltage

filter promotes ripple at peak voltage

none of the above

⇒

**Assertion (A):** In microprocessor 8085 DMA allows direct access to memory to speed up data transfer.

**Reason (R):** HOLD and HLDA signals are used for DMA operations.

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 first geostationary satellite launched in 1965 was called

ANIK

EARLY BIRD (Intelsat-I)

WESTAR

MOLNIYA

⇒ Virus is a

computer hardware problem

an operating system

a computer program

a computer language

⇒ In figure, V

_{G2.22 V22.2 V0.22 V0.022 V}

⇒ Both OR and AND gates can have only two inputs.

TRUE

FALSE

⇒ In metals the valence electron wave functions are strongly perturbed by the presence of neighbouring atoms.

TRUE

FALSE

⇒ The number of layers in a Shockley diode are

2

3

4

2 or 3

⇒ The log magnitude curve of factor

*j*ω is a straight line having a slope of 20 dB/decade.

TRUE

FALSE

⇒ Schrodinger wave equation is a

linear equation

differential equation

partial differential equation

none of the above

⇒ Two sinusoidal voltage sources

*v*

_{1}= 50 sin (100

*t*) and

*v*

_{1}= 50 sin (100

*t*+ p) are connected in parallel and fed an inductance X

_{L}= 2Ω. The cuirent through X

_{L}is

25 A

about 17.5 A

zero

50 A

⇒ A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

the gain is increased beyond upper critical value

the gain is decreased below lower critical value

both (a) and (b)

none of the above