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Assertion (A): Wien bridge can be used for measuring frequency. Reason (R): A frequency meter for 50 Hz system has a frequency range of 40 to 60 Hz. | |
A. | Both A and R are true and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are true but R is not correct explanation of A [Wrong Answer] |
C. | A is true R is false [Correct Answer] |
D. | A is false R is true [Wrong Answer] |
View Answer
Explanation:-
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Which one of the following theorem can be conveniently used to calculate the power consumed by the 10 Ω resistor in the network shown in the above fig
Thevenin's theorem
Maximum power transfer theorem
Millman's theorem
Superposition theorem
⇒ If C is thermal capacitance, m is mass of liquid and c is specific heat, then
C = mc
c = mC
m = cC
C = (mc)^{2}
⇒ If A = 3 + j1, A^{4}
100 ∠18.43°
100 ∠73.72°
10 ∠18.43°
10 ∠73.72°
⇒ The number of valence electrons in pentavalent impurity is
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⇒ Silicon and germanium are elements in the
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third column of periodic table
fourth column of periodic table
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⇒ In bridge circuit of figure, equivalent resistance between A and B
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h_{ie} = 5 kΩ, h_{re} = 0, h_{fe} = 50, h_{oe} = 2 m mho
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⇒ Which one of the following theorem can be conveniently used to calculate the power consumed by the 10 Ω resistor in the network shown in the above fig
Thevenin's theorem
Maximum power transfer theorem
Millman's theorem
Superposition theorem
⇒ If C is thermal capacitance, m is mass of liquid and c is specific heat, then
C = mc
c = mC
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C = (mc)^{2}
⇒ If A = 3 + j1, A^{4}
100 ∠18.43°
100 ∠73.72°
10 ∠18.43°
10 ∠73.72°
⇒ The number of valence electrons in pentavalent impurity is
5
4
3
1
⇒ In high power AM transmission modulation is done at
IF stage
RF power
buffer stage
oscillator stage
⇒ In the Taylor series expansion of exp(x) + sin(x) about the point x = p, the coefficient of (x - p)^{2} is
exp (p)
0.5 exp (p)
exp (p) + 1
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⇒ Silicon and germanium are elements in the
second column of periodic table
third column of periodic table
fourth column of periodic table
fifth column of periodic table
⇒ In bridge circuit of figure, equivalent resistance between A and B
1 Ω
0.5 Ω
2 Ω
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⇒ The disadvantage of counter type ADC as compared to comparator ADC is that
resolution is low
conversion time is more
circuit is more complex
stability is low
⇒ The number of spectral component when two cosine waves are multiplied of different frequency
1
2
8
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⇒
Assertion (A): A slight change in pole-zero configuration can cause only minor changes in root locus configuration.
Reason (R): Asymptotes show the behaviour of root loci for |s| >> 1
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
R is correct but A is wrong
⇒ What is the RF amplifier plate voltage when the audio-modulating voltage is +600
-600 V
Zero
600 V
1200 V
⇒ Current density has the dimensions
IL
IL^{-2}
IL^{-3}
I^{2}L^{-2}
⇒ For an ideal antenna, numerical value of directivity must be
∞
0
1
any value
⇒ Electronic tubes used for transmitter differ from their counterparts in the receivers in respect that
they are large in size
they are capable of handling large powers
they generate large amount of heat when in operation
none of the above
⇒ The simplest mixer circuit for public address system uses
fixed resistances
variable resistances
inductances
capacitances
⇒ Whether a linear system is stable or unstable that it
is a property of the system only
depends on the input function only
both (a) and (b)
either (a) or (b)
⇒ In parallel in-parallel out shift register all bits are loaded and read simultaneously.
TRUE
FALSE
⇒ In controlled heating circuits, thyristors act as
rectifier
inverter
ac regulator
chopper
⇒ To realize following function 'f'
3
6
4
10
⇒ Cells are connected in series to increase
current-rating
both voltage and current rating
the life of cell
voltage rating
⇒ When negative feedback is used the fractional changes in closed loop gain are desensitized by the factor (1 + A_{v}β)
TRUE
FALSE
⇒ The specific gravity of tungsten is 13.8 and its atomic weight is 184.0 Assume that there are two free elements per atom. Then the Fermi level or characteristic energy for the crystal in eV will be
8.95 eV
-8.95 eV
7.326 eV
-7.326 eV
⇒ As frequency increases, the transmission efficiency
decreases
increases
is not affected
either (a) or (c)
⇒ Surface impedance at high frequencies is a consideration for
ferrites
semiconductors
good conductors
dielectrics
⇒ For an RC admittance function Y, the slope dY/dσ
is positive
is negative
may be positive or negative
0
⇒ The series element in band pass filter is
capacitive
inductive
parallel combination of inductance and capacitance
series combination of inductance and capacitance
⇒ Typical values of h parameters at about 1 mA collector current for small signal audio amplifier in CE configuration are :
h_{ie} = 100 Ω, h_{re} = 10^{-1}, h_{fe} = 50, h_{oe} = 1 m mho
h_{ie} = 5 kΩ, h_{re} = 10^{-4}, h_{fe} = 200, h_{oe} = 20 m mho
h_{ie} = 5 kΩ, h_{re} = 0, h_{fe} = 50, h_{oe} = 2 m mho
h_{ie} = 100 kΩ, h_{re} = 10^{-2}, h_{fe} = 100, h_{oe} = 10 m mho
⇒ Fundamental mode is another name for
level operation
pulse operation
clock operation
none of these
⇒ An XOR gate with 8 variable is as foll
255
127
128
256