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The power density spectrum of noise voltage of resistor R can be expressed as | |
A. | 2 kTR [Correct Answer] |
B. | 1 kTR [Wrong Answer] |
C. | 0.5 kTR [Wrong Answer] |
D. | 0.25 kTR [Wrong Answer] |
View Answer
Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
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counts for ten days
counts ten times faster than a binary counters
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reverts on the pulse after the tenth
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⇒ The number of flags available in 6800 are
6
5
7
4
⇒ In Modulation, "carrier" is
resultant wave
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voltage with constant frequency, phase or amplitude
voltage for which frequency, phase or amplitude is varied
⇒ In an ac network, Thevenin's impedance and Norton's impedance are
always the same
generally the same
sometimes the same
always different
⇒ In C-language f- = 9 is equivalent to
f = -9
f = f - 9
f = 9 - 1
-f = 9
⇒ The speed at which axial electric field due to signal advances in a TWT is equal to
speed of light
(speed of light) (helix pitch helix circumference)
(speed of light) (helix circumference helix pitch)
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⇒ In a power amplifier the collector current flows for 270° of the input cycle. The operations is
class A
class B
class AB
class C
⇒ Whenever a JFET operates above pinch-off voltage
depletion regions become smaller
drain current increase steeply
drain current starts decreasing
drain current remains nearly constant
⇒ An air-filled rectangular waveguide has dimensions 8cm x 10cm . The wavelength of waveguide at frequency 3 GHz
25 cm
100 cm
16.13 cm
23.09 cm
⇒ An 8085 executes the following instructions
PC = 30A0H HL = 2715H
PC = 6104 H HL = 6140 H
PC = 6140H HL = 2715H
⇒ Solution of Laplace equations, which are continuous through the second derivative, are called
bessel functions
odd functions
harmonic functions
fundamental functions
⇒ A ground wave travels along surface of ground.
TRUE
FALSE
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connect both S and R to D
connect D to S directly and D to R through inverter
connect D to R directly and D to S through inverter
connect S to D and leave R open
⇒ When a semiconductor bar is heated at one end, a voltage across the bar is developed. If the heated is positive the semiconductor is
P-type
n-type
intrinsic
highly degenerate
⇒ A computer memory is an ordered sequence of storage cells.
TRUE
FALSE
⇒ Ionospheric storm causes an abnormal decrease in the critical frequency.
TRUE
FALSE
⇒ When a function Z(s) having a pole at infinity is realized, we get
a capacitance in series
a resistance in series
an inductance in series
a resistance or inductance in series
⇒ Z_{L} = 200 Ω and it is desired that Z_{i} = 50 Ω The quarter wave transformer should have a characteristic impedance of
100 Ω
40 Ω
10000 Ω
4 Ω
⇒ At t = 0^{+}, the current i_{1- V/2R- V/4R- V/Rzero}
⇒ As regards ∈_{0} and ∈_{r} (absolute and relative permittivity)
both ∈_{0} and ∈_{r} can be interpreted in terms of atomic properties of medium
only ∈_{r} can be interpreted in terms of atomic properties of medium
only ∈_{0} can be interpreted in terms of atomic properties
∈_{r} has no physical significance
⇒ Which of the transistor models is most preferred for the analysis of a transistor circuit both at mid-band and at high frequencies?
h-parameter model
y-parameter model
s-parameter model
hybrid-p model
⇒ In an R-L circuit, the impedance is 30 Ω at a frequency of 100 Hz. At 200 Hz, the impedance should be
30 Ω or more
60 Ω or more
15 Ω or less
more than 30 Ω but less than 60 Ω
⇒ In microwave circuits, a mode transducer is used to
change mode of wave transmission
change direction of wave transmission
change polarization of wave transmission
change mode, direction or polarization wave transmission
⇒ If the function A, B are A = R + PQ + RS B = PQRS + PQRS + PQRSA = B
A = B
no direct relation between A and B
insufficient data
⇒ The maximum distance between television transmission and receiving antennas for reasonably good reception should be
less than 20 km
less than 100 km
less than 500 km
less than 1000 km
⇒ 'WRITE' is a
Word processor
Line editor
Text editor
Column editor