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Q1. | Which of the following noise sources is different from others? |

A. | Cosmic [Wrong Answer] |

B. | Solar [Wrong Answer] |

C. | Atmospheric [Correct Answer] |

D. | Galactic [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss 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 :**

⇒ From an

*n*channel JFET for V

_{DS}constant and if V

_{GS}is made more negative, pinch off would occur at

higher value of drain current

saturation value of drain current

zero drain current

gate current equal to drain current

⇒ For an I/p of V

_{s}= 5 sin ω

*t*(assuming ideal diode), circuit shown in the figure will behave

clipper, sine wave clipped at -2 V

clamper, sine wave clamped at -2 V

clamper, sine wave clamped at 0 volts

clipper, sine wave clipped at 2 V

⇒ Out of the three transforms viz. Z-transform, Laplace transform and Fourier transform

all three are used in continuous time domain

all three are used in both continuous time domain and discrete time domain

Z transform is used in continuous time domain while Laplace and Fourier transforms are used in discrete time domain

Z transform is used is discrete time domain while Laplace and Fourier transforms are used in continuous time domain

⇒ 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

⇒ Two resistances of 2 Ω each are connected in series. A shunt having zero resistance is connected across the combination. The overall resistance will be

4 Ω

1 Ω

0.5 Ω

zero

⇒ For the system in the given figure the root l

is on real axis between points

*s*= -1 and

*s*= -3.6

is on real axis between points

*s*= 0 and

*s*= -1

is on real axis between points

*s*= -3.6 and

*s*= ∞

is on real axis between points

*s*= 0 and

*s*= -3.6

⇒ Time rate of change in heat energy is analogous to

voltage

charge

current

voltage gradient

⇒ Which of the following subtraction operations do not result in F

_{16}?

- (BA)
_{16}- (AB)_{161 and 21 and 32 and 31, 2 and 3}

⇒ 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

⇒ In a TWT the amplitude of resultant wave travelling down the helix remains constant

TRUE

FALSE

⇒ In an ac single phase energy meter, the potential coil is put on

both side limbs, of upper magnet

central limb of upper magnet

one side limb of upper magnet

either (a) or (b)

⇒ For a binary half subtractor having two inputs*A*and*B*the correct sets of logical expressions for the outputs*D*(*A*-*B*) and*X*= Borrow are

D = AB + AB, X = AB

D = AB AB, X = AB

D = AB + AB, X = AB

D = AB + A B, X = AB

⇒ For matching over a range of frequencies in a transmission line it is best to use

a balun

a broad band directional coupler

double stub

a single stub of adjustable position

⇒Match the following:

List I (Microwave device) List II (Application) A. Reflex Klystron 1. Wideband amplification B. TWT 2. Very low power amplification C. Cavity Klystron 3. Low power FM generation D. Maser 4. Frequency multiplication

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

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

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

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

⇒ One electron volt is equivalent to

1.6 x 10^{-10}joule

1.6 x 10^{-13}joule

1.6 x 10^{-16}joule

1.6 x 10^{-19}joule

⇒ The inputs to a 3 bit binary adder are 111_{2}and 110_{2}. The output will be

101

1101

1111

1110

⇒Match the following:

List I (Types of N-bit ADC) List II (Characteristics) A. Flash converter 1. Integrating Type B. Successive 2. Fastest converter approximation C. Counter ramp 3. Maximum conversion time = N bits D. Dual slow 4. Used a DAC in its feedback path

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

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

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

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

⇒**Assertion (A):**The forward resistance of a*p*-*n*diode is not constant.**Reason (R):**The*v*-*i*characteristics of*p*-*n*diode is non-linear.

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

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

A is true but R is false

A is false but R is true

⇒ The on voltage and forward breakover voltage of an SCR depend on

gate current alone

band gap of semiconductor alone

gate current and semiconductor band gap respectively

semiconductor band gap and gate current respectively

⇒**Assertion (A):**In register indirect addressing mode of 8085, the address of operand is in the specified register.**Reason (R):**An example of register indirect addressing mode is`MOV, A, M.`

.

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

⇒**Assertion (A):**A balun is an RF impedance matching transformer.**Reason (R):**Sometimes a booster amplifier is used with a TV set.

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

A is wrong but R is correct

⇒ A Hartley oscillator uses FET with*g*of 2 ms and_{m}*r*= 2 KΩ. The total coil inductance is 10 μH with turns ratio of input to output side of 1 : 10. It is tuned with a 50 pf capacitor. Find frequency of oscillations, amplifier gain margin in dB._{d}

7.11 MHz, 13.97 dB

7.3 MHz, 14.1 dB

6.93 MHz, 12.9 dB

7.4 MHz, 13 dB

⇒ A first-order system has a time constant t. For unit ramp input, the steady state error is

t^{2}

t

t

1/t

⇒ The simplest register is

buffer register

shift register

controlled buffer register

bidirectional register

⇒ The magnetic moment in units of Bohr magneton of a ferrous ion in any ferrite is

zero

2

4

6

⇒ The eign values of*n*x*n*matrix A are the root of the characteristic equation 1λI - AI = 0

TRUE

FALSE

⇒ A flip-flop circuit is

monostable

bistable

multistable

unstable

⇒ In E plane metal plate lens antenna

travelling wavefronts are retarded

travelling wavefront are accelerated

travelling wavefront remains unaffected

none of the above

⇒ Which of the following*h*parameters is an admittance?*h*_{ie}*h*_{re}*h*_{fe}*h*_{oe}

⇒ For the power amplifier circuit shown below, the maximum power dissipated by both output transisto

9.66 W

30.11 W

31.66 W

33.66 W