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Q1. | The frequency of the driving network connected between pins 1 and 2 of a 8085 chip must be |

A. | equal to the desired clock frequency [Wrong Answer] |

B. | twice the desired clock frequency [Correct Answer] |

C. | four times the desired clock frequency [Wrong Answer] |

D. | eight times the desired clock frequency [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 INHIBIT operation

output is 1 when both inputs are 0

output is 0 when blocking input is 1

output is 0 when blocking input is 0

output is 1 when blocking input is either 0 or 1

⇒ TTL inverter has

one input

two inputs

one or two inputs

three inputs

⇒ The maximum range of a transmitter depends on

its frequency

its power

both its frequency and power

none of the above

⇒ As regards ferromagnetic Curie temperature Q

*and paramagnetic curie temperature θ*

_{f}Q

*> θ*

_{f}θ > Q

_{f}θ equal to or less than Q

_{f}θ may be equal to less than or more Q

_{f}⇒ 5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?

20 days

18 days

16 days

15 days

⇒ The spectral component of noise associated with

*k*

^{th}frequency is given, in the limit as Δ

*f*→ 0 by

*n*(

_{k}*t*) written as

*n*(

_{k}*t*) = C

_{k}cos (2p

*k*Δ

*ft*+ θ

_{k1, 2 only1, 3 only1, 2, 32, 3 only}

⇒ Waves of frequencies higher than 30 MHz penetrate the atmosphere.

TRUE

FALSE

⇒ In an end fire array, the radiation pattern

is in the plane of array

is at right angles to array

is at an angle to the plane of array

either (b) or (c)

⇒ High frequency waves are

absorbed by F

_{2}layer

affected by solar cycle

reflected by D layer

none of the above

⇒ The noise margin of a TTL gate is about

0.2 V

0.4 V

0.6 V

0.8 V

⇒ In the circuit of figure both diodes are ideal. If

*v*

_{1}= 10 V and

*v*

_{2}= 10 V which diode will cond

D

_{1}only

D

_{2}only

Both D

_{1}and D

_{2}

Neither D

_{1}nor D

_{2}

⇒ Which of the following is taken as reference antenna for directive gain?

Half wave dipole

Elementary doublet

Isotropic

Infinitesimal dipole

⇒ Electric dipole is located at origin in a medium with ε

_{r}= 6, has a moment P = (4

*a*- 2

_{x}*a*+

_{y}*a*)

_{z}*n*C. Then potential at (2, 4, 4) is:

0.062

0.027

0.042

0.072

⇒ If the input to the ideal comparator shown in the figure is a sinusoidal signal of 8 V (peak to peak) without any DC component, then the output of the comparator has a duty cycl

42737

42738

42741

42747

⇒ Consider two random processes

*x(t)*and

*y(t)*have zero mean, and they are individually stationary. The random process is

*z(t)*=

*x(t)*+

*y(t)*. Now when stationary processes are uncorrelated then power spectral density of

*z(t)*is given by

S

*+ S*

_{x}(f)*+ 2S*

_{y}(f)

_{xy}(f)S

*+ S*

_{x}(f)*+ 2S*

_{y}(f)*+ 2S*

_{xy}(f)

_{yx}(f)S

*+ S*

_{x}(f)

_{y}(f)S

*+ S*

_{x}(f)*- 2S*

_{y}(f)*- 2S*

_{xy}(f)

_{yx}(f)⇒ In order to rectify sinusoidal signals of millivolt range (< 0.6 V)

bridge rectifier using diodes can be employed

full wave diode rectifier can be used

a diode is to be inserted in the feedback loop of an op-amp

a diode is to be inserted in the I/P of an op-amp

⇒ Which of the following can provide a digital signal?

Slow change in the value of a resister

Sine wave

Square wave

Gradual turning of a potentiometer

⇒ For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the velocity propagation will be

15.8303 km/s

15.830 km/s

1.583 km/s

0.1583 km/s

⇒ The power consumption of a present day colour TV receiver is about

8 W

80 W

200 W

400 W

⇒ If N bits are lumped together to get an N-bit symbol, the possible number of symbols is

2

^{N}

2

^{N - 1}

2

^{N - 2}

2

^{N - 4}

⇒ In an ac series RLC circuit the maximum phase difference between any two voltages can be

90°

45°

- 90°

180°

⇒ In a diode rectifier with a capacitance input filter, a surge current is likely to flow when the circuit is switched on. The cause of this surge current is

the non linear behaviour of diodes

the capacitor acts as a short circuit at the instant of switching,

the inductance of leads

both (a) and (b)

⇒ Consider the following statements about data structures in Pascal

- Arrays and files are types of data structures.
- List structure is not a data structure in Pascal.
- Each element of a binary tree is called a node of the tree.

All

1, and 2 only

1 and 3 only

2 and 3 only

⇒ The parity bit is

always 1

always 0

1 or 0

none of the above

⇒ AM transmitter employing low level modulation

uses class C amplifier for amplification

requires higher audio power

has a poor efficiency

has a higher efficiency

⇒ The relaxation time of electrons in a metal is of the order of

10

^{-6}secs

10

^{-10}secs

10

^{-14}secs

10

^{-20}secs

⇒ The signumm function written as [

*sgn(*] is defined as

*t*)*sgn(t)*= - 1 for

*t*< 0, = 0 for

*t*= 0 and = 1 for

*t*> 0

*sgn(t)*= 1 for

*t*< 0, = 0 for

*t*= 0 and = - 1 for

*t*> 0

*sgn(t)*= 0 for

*t*< 0, = 1 for

*t*= 0 and = 0 for

*t*> 0

*sgn(t)*= 0 for

*t*< 0, = 1 for

*t*

^{3}0

⇒ Which distortion is least objectionable in case of audio amplifiers?

Phase distortion

Frequency distortion

Harmonic distortion

Inter-modulation distortion

⇒ A signal with ± 10 V ranged and 1 KHz band width is being digitized using a sample and hold circuit and a 10 bit quantizer. The quantization step is :

1 x 10

^{-9}V

5 x 10

^{-9}V

2.5 x 10

^{-9}V

0.5 x 10

^{-9}V

⇒ For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is Y. Y is give

A + (B + C) D

A + BC + D

A(BC + D)

none of these