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Q1. | Thermal noise is independent of |

A. | temperature [Wrong Answer] |

B. | bandwidth [Wrong Answer] |

C. | centre frequency [Correct Answer] |

D. | Boltzmann constant [Wrong Answer] |

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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 :**

⇒ JFET is also known as

linear device

square law device

inverse law device

logarithmic law device

⇒ In waveguides the existing waves are

TE only

TM only

both (a) and (b)

all of the above

⇒ Which one of the following statements is not a property of RL driving point impedance?

The first critical frequency at the origin is a zero

The last critical frequency is a pole

The impedance at S = ∞ always less than the impedance at S = zero

The slope of the impedance curve is positive at all points

⇒ Bandwidth will be

*a*.

*b*

*a*+

*b*

*a*

*b*

⇒ The number of gates in an SCR is

1

3

4

6

⇒ Induction wattmeter is an absolute instrument.

TRUE

FALSE

⇒ The resistivity of ferrites is

very much lower than that of the ferromagnetic metals

slightly lower than that of the ferromagnetic materials

slightly higher than that of the ferromagnetic metals

very much higher than that of the ferromagnetic metals

⇒ The process of deliberately adding impurity to a semi-conductor material is called

impurification

pollution

deionisation

doping

⇒ The voltage drop per ampere-metre of an aluminium conductor is higher as compared to a copper conductor of the same size due to its higher

insulation resistance

resistivity

conductivity

current density

⇒ The scale factor for half wave and full wave rectifier is __________ respectively.

1.11, 1.414

1.11, 1.57

1.57, 1.11

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⇒ In AM receiver the oscillator frequency is

always equal to signal frequency

always equal to 455 kHz

always higher than signal frequency

always lower than signal frequency

⇒ Minimum number of J-K flip-flop needed to construct a

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3

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5

⇒ In a four variable K map eight adjacent cells give

single variable term

two variable term

three variable term

four variable term

⇒ In single tone FM discriminator (S

_{0}/N

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proportional to cube of deviation

proportional to square of deviation

none of the above

⇒ The dominant mode in a rectangular wave-guide is

TE

_{01}

TM

_{01}

TE

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TM

_{11}

⇒ The current gain of a bipolar transistor drops at high frequencies because of

transistor capacitance

high current effects in the base

parasitic inductive elements

the early effect

⇒ A delay equalizer is a

low pass filter

band pass filter

all pass filter

high pass filter

⇒ A network has two sources of different frequencies. The only method of analysis which can be used to find current and voltages of different branches is the use of

Kirchoff's laws

Superposition theorem

Thevenin's theorem

Tellegen's theorem

⇒ In figure, the capacitor is charged to 1 V. At

*t*= 0 the switch is closed so that

*i*=

*e*

^{-t}. When

*i*= 0.37 A, the voltage across capacito

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0.63 V

0.37 V

0.185 V

⇒ By connecting external resistances to a differential amplifier we can adjust

voltage gain

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both voltage gain and bandwidth

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⇒ To realize following function

*'f'3*

6

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6

4

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⇒ In a base driver amplifier the voltage gain is the ratio of

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ac emitter voltage to ac base voltage

ac collector voltage to ac emitter voltage

ac base voltage to ac emitter voltage

⇒ A divide by 78 counters can be realized by using

six mod-13 counters

thirteen mod-6 counters

one mod 13 counter followed by one mod-6 counter

thirteen mod-13 counters

⇒ 8085 has 6 sign flags.

TRUE

FALSE

⇒ Which of the following is not considered as a useful quantity in comparing noise performance of receivers?

Noise temperature

Noise figure

Noise resistance

Input noise voltage

⇒ In deriving ac equivalent circuit for an amplifier circuit we short circuit

all resistors

all transistors

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⇒ The initial contents of

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⇒ In Intel 8085, the integer range per word length is

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⇒ A potential of 7 V is applied to a silicon diode. A resistance of 1 kΩ is also connected in series. If the diode is forward biased, the current in the circuit is

7 mA

6.3 mA

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0

⇒ For an R-C impedance function, the residues at all poles are

real

imaginary

real and positive

positive

⇒ In a base driver amplifier the voltage gain is the ratio of

ac collector voltage to ac base voltage

ac emitter voltage to ac base voltage

ac collector voltage to ac emitter voltage

ac base voltage to ac emitter voltage

⇒ A divide by 78 counters can be realized by using

six mod-13 counters

thirteen mod-6 counters

one mod 13 counter followed by one mod-6 counter

thirteen mod-13 counters

⇒ 8085 has 6 sign flags.

TRUE

FALSE

⇒ Which of the following is not considered as a useful quantity in comparing noise performance of receivers?

Noise temperature

Noise figure

Noise resistance

Input noise voltage

⇒ In deriving ac equivalent circuit for an amplifier circuit we short circuit

all resistors

all transistors

all inductors

all capacitors

⇒ The initial contents of

`ACC and CY`

in 8085 are - CY = 1
- ACC = 10000001

After instruction `RAL`

is executed once the contents of `CY and ACC`

respectively will be1 and 00000011

0 and 00000011

1 and 00000001

0 and 00000001

⇒ In Intel 8085, the integer range per word length is

-128 to 127

-127 and 128

-64 and 63

-63 and 64

⇒ A potential of 7 V is applied to a silicon diode. A resistance of 1 kΩ is also connected in series. If the diode is forward biased, the current in the circuit is

7 mA

6.3 mA

0.7 mA

0

⇒ For an R-C impedance function, the residues at all poles are

real

imaginary

real and positive

positive