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Q1. | In a oscillator, a sine wave generator starts at t = 0. It consist of |

A. | Pure sine wave [Correct Answer] |

B. | Pure cosine wave [Wrong Answer] |

C. | Unity for t > 0 [Wrong Answer] |

D. | 2∪(t) - 1 [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 :**

⇒ In the following non-planar graph no.of independent loop equations

8

12

7

5

⇒ A mod 4 counter will count

from 0 to 4

from 0 to 3

from any number n to n + 4

none of the above

⇒ In which one of the following types of analog to digital converts the conversion time is practically independent of the amplitude of the analog signal?

The dual slope integrating type

Successive approximation type

Counter ramp type

Tracking type

⇒ The main advantage of using micro waves for communications is

large bandwidth

small bandwidth

low power

high power

⇒ Which of the following statements regarding two transistor model of

*p*-

*n*-

*n*-

*p*device is correct?

It explain only the turn on portion of the device characteristics

It explain only the turn off portion of the device characteristics

It explain only the negative region portion of the device characteristics

It explain all the regions of the device characteristics

⇒ Consider the following features:

- negative operands cannot be used
- when immediate operand changes, the program should be reassembled
- the program is difficult to read
- the size of operand is restricted by word length of the computer

1 and 2

2 and 4

2 and 3

1 and 4

⇒ Which of the following is invariably found in SSB?

Tuned modulator

Class B, RF amplifier

Class C, audio amplifier

All of the above

⇒ A certain JK FF has

*t*= 12 nsec. The largest MOD counter that can be constructed from these FFs and still operate up to 10 MHz is

_{pd}any

8

256

10

⇒ Which of the following cannot be the Fourier series expansion of a periodic signal?

*x*(

*t*) = 2 cos

*t*+ 3 cos 3

*t*

*x*(

*t*) = 2 cos pt + 7 cos

*t*

*x*(

*t*) = cos

*t*+ 0.5

*x*(

*t*) = 2 cos 1.5p

*t*+ sin 3.5 p

*t*

⇒ Power handling capacity of wire wound potentiometer used in control systems is about

0.1 W

5 W

25 W

100 W

⇒ The inverse Laplace transform of 1/(

*s*-

*a*)

^{2}is

*e*

^{at}*t*

*e*

^{at}*t*

^{2}

*e*

^{at}*e*/

^{at}*t*

⇒ Saturation of iron core causes distortion.

TRUE

FALSE

⇒

**Assertion (A):** Moving iron instrument can be used on ac or dc.

**Reason (R):** In a moving iron instrument deflecting torque is proportional to square of current.

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

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

A is true R is false

A is false R is true

⇒ The phase difference (

*j*ω -

*p*

_{1})

phasor directed from

*p*

_{1}to

*j*ω

phasor directed from origin to

*p*

_{1}

phasor directed from origin to

*j*ω point

phasor directed from

*j*ω to

*p*

_{1}

⇒ An RL impedance function is to be synthesised in second Foster form. The proper function to be expanded is

Z(

*s*)

*s*Z(

*s*)

1/Z(

*s*)

Z(

*s*)/

*s*

⇒ There is no hysteresis phenomenon is any dielectric material.

TRUE

FALSE

⇒ A transistor with a = 0.9 and I

_{CBO}= 10 μA is biased so that I

_{BQ}= 90 μA. Then I

_{EQ}will be

5.15 mA

5.2 mA

5 mA

990 mA

⇒ Two passive elements are connected in series and a dc voltage is applied to the circuit. The time variation of the current is shown in figure. The two elements

one resistance and the other inductance

both resistances

one inductance and the other capacitance

one resistance and the other capacitance

⇒ A control system is as shown in given figure The maximum value of gain K for which the system is stable

more than 5

equal to 5

less than 1

less than 5

⇒ In a single phase semi-converter the number of thyristors is

16

8

4

2

⇒ In a resistance loaded, RC coupled amplifier the d.c. component is blocked by

Transistor

C

_{C}

R

_{B}

R

_{C}

⇒ The value of a in a transistor

is always equal to 1

is less than 1 but more than 0.9

is about 0.4

is about 0.1

⇒ In the integer expression

`- A * B div C + D`

which operation is done first in Pascal-

*

div

+

⇒ A circuit is replaced by its Thevenin's equivalent to find current through a certain branch. If V

_{TH}= 10 V and R

_{TH}= 20 Ω, the current through the branch

will always be 0.5 A

will always be less than 0.5 A

will always be equal to or less than 0.5 A

may be 0.5 A or more or less

⇒ The process of extension of a single-crystal surface by growing a film in such a way that the added atoms form a continuation of the single-crystal structure is called

Ion implantation

Chemical vapour deposition

Electroplating

Epitaxy

⇒ Auto correlation for t = 0 is equal to

average power S of waveform

square of average power S of waveform

half of average power S of waveform

square root of average power S of waveform

⇒

**Assertion (A):** In root locus the breakaway and break in points either lie on real axis or occur in complex conjugate pairs.

**Reason (R):** All root locus asymptotes intersect on real axis.

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

⇒ The spins in a ferrimagnetic material are

all aligned parallel

partially aligned antiparallel without exactly cancelling out sublattice magnetisation

randomly oriented

all aligned antiparallel such that the sublattice cancels out exactly

⇒ Whenever a wave is incident on a perfect conductor then the reflection coefficient is

1

0

1 < 180°

depend upon η

_{1}, η

_{2}

⇒ The load end of a quarter wave transformer gets disconnected thereby causing an open-circuited load. What will be the input impedance of the transformer?

Zero

Infinite

Finite and Positive

Finite and Negative