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Q1. | Which of the following noise becomes of great importance at high frequencies? |

A. | Shot noise [Wrong Answer] |

B. | Agitation noise [Wrong Answer] |

C. | Flicker noise [Wrong Answer] |

D. | Transit time noise [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 a perfect conductor the resistor noise is

maximum

zero

very high

almost infinite

⇒ For 10 bit PCM system, the signal to quantization noise ratio is 62 dB. If the number of bits is increased by 2, then the signal to quantization noise ratio will

increased by 6 dB

increased by 12 dB

decreased by 6 dB

decreased by 12 dB

⇒ For operation of enhancement only N-channel MOSFET, value of gate voltage has to be

zero

low positive

high negative

high positive

⇒ Entropy gives

measure of Uncertainty

rate of Information

average information

probability of Information

⇒ BCD equivalent of - 8

_{10}is

110

10110

11000

1000

⇒ When one operand is real and one integer in Pascal, which of the following operations are not allowed?

+ and -

*

/

Div and Mod

⇒ It is required that a strain gauge has gauge factor of 100. The proper strain gauge is

constantan strain gauge

nichrome strain gauge

semiconductor strain gauge

alloy strain gauge

⇒ In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.

TRUE

FALSE

⇒ The scale of dynamometer wattmeter is non linear.

TRUE

FALSE

⇒ In a three cavity klystron amplifier, the oscillations are excited in

input cavity

output cavity

intermediate cavity

both (a) and (b)

⇒ X and Y are two random variables and Z = X + Y . Letmz, m

*, m*

_{z}*, m*

_{x}*represent mean of Z, X and Y. Then*

_{y}*m*=

_{z}*m*+

_{x}*m*

_{y}*m*≤

_{z}*m*+

_{x}*m*

_{y}*m*<

_{z}*m*+

_{x}*m*

_{y}*m*>

_{z}*m*+

_{x}*m*

_{y}⇒ If the resolution of a printer is 1200 dpi, the number of dots per square inch is

1200

800

1200 x 1200

either (a) or (b)

⇒ Which of the following cannot be used to demodulate SSB?

Complete phase-shift generator

Product detector

Diode balanced modulator

Bipolar transistor balanced modulator

⇒ A voltage of 9 V is applied in forward direction to a semiconductor diode in series with a load resistance of 1000 Ω. The voltage across the load resistance is zero. It indicates that

diode is short circuited

diode is open circuited

resistor is open circuited

diode is either o.c or s.c

⇒ 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

⇒ An insulator will conduct when the

voltage applied is more than the breakdown voltage

temperature is raised to very high level

either (a) or (b) above

none of the above

⇒ NMOS devices have __________ switching speeds and __________ on-state resistance; as compared with PMOS devices.

slower, higher

faster, lower

faster, higher

slower, lower

⇒ A half adder adds __________ bits and a full adder adds __________ bits.

two, three

three, four

four, six

two, four

⇒ A series RL circuit is excited by a voltage

*v*(

*t*) = V

_{m }sin (ω

*t*+ Φ). The transient current will be zero if

Φ = 0

ω = 0

Φ = tan

^{-1}(ωL/R)

ω - tan

^{-1}(ωL/R) = p/2

⇒ The circuit of figure is ca

diode bias

current mirror

complementary mirror

none of the above

⇒ Which of the following buses does not exist in 8085?

Data bus

Address bus

Control bus

Exchange bus

⇒ Out of SR and JK flip flops, which is susceptible to race condition?

SR

JK

Both SR and JK

None of the above

⇒ Decimal 1932 when converted into 10's complement will become

8868

8060

8608

8806

⇒ Which of the following statement about TRIAC is incorrect?

It is not particularly suited to A.C. or mains power control

Any one of its main terminals can be used either as cathode or as anode

It can be triggered in response to both positive and negative gate terminals

None of the above

⇒ The signal m(

*t*) = 10 cos 100 p

*t*is sampled at the rate of F

_{s}= 75 H

_{z, }then determine signal after sampling.

4 cos 100 p

*t*+ 8 sin 200 p

*t*

4 cos 100 p

*t*+ 8 sin 200 p

*t*+ cos 75 p

*t*

4 cos 25 p

*t*+ 8 sin 50 p

*t*+ cos 75 p

*t*

none

⇒ A standard waveguide W R90 has inside wall dimensions of

*a*= 2.286 cm and

*b*= 1.016 cm. What is the cut-off wavelength for TE

_{01}mode?

4.572 cm

2.286 cm

2.032 cm

1.857 cm

⇒ In an

*n*type semiconductor

number of free electrons and holes are equal

number of free electrons is much greater than the number of holes

number of free electrons may be equal or less than the number of holes

number of holes is greater than the number of free electrons

⇒ In the FM wave described by equation

*v*= 15 sin (4 x 10

^{8}

*t*+ 3 sin 1100

*t*), the maximum frequency deviation is

175 Hz

525 Hz

3 Hz

58.33 Hz

⇒ 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*

⇒ Norton's theorem reduces a two terminal network to

a constant current source and an impedance is parallel

a constant current source and an impedance in series

a constant voltage source and an impedance in parallel

a constant voltage source and an impedance in series