What can be used to estimate resonant frequency and to find reactance at any frequency for any value of capacitor or inductor?
Smith chart
Reactance chart
Impedance chart
Resonance chart
Correct Answer :
B. Reactance chart
Related Questions
The capacitance of a capacitor is ___ relative permittivity.
Directly proportional to
Inversely proportional to
Equal to
Inversely proportional to the square of
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Three times the value of a single resistor
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Nine times the value of a single resistor
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XL= is 50a000
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XC= is 50a000
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Current
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Because dc circuits require only resistance as load
Because they do not exist in a dc circuit
Because frequency of dc is zero
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½
Transient period is considered over after
For greater accuracya the value of phase angle should be determined from
Cos
Tan
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Sec
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Increase the voltage rating compared with one resistor alone
Reduce the voltage rating compared with resistor alone
Result in an expensive circuit
In liquids and gasesa ionization current results from a flow of
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Free electrons
Ions that are lighter in weight than electrons
Protons
Which of the following does not refer to electrical energy?
Volt-ampere
Joule
Watt-second
Volt-coulomb
Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
Skin effect
Night effect
Edge effect
Hall effect
The reciprocal of a complex number is
A complex number
A real number
An imaginary number
A whole number
The graph between an alternating quantity and time is called
Sine wave
Curve
Waveform
A plot
A series RLCcircuit has a ______ power factor at its half-power points
Unity
Leading
Lagging
Either B or C
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Power absorbed is maximum
Power absorbed is minimum
Power absorbed is zero
The impedance is minimum
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The rate at which electrons are produced
The type of material used
The current carrying capacity of the circuit
The rate at which electrons pass a given point
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Increases two times
Increases four times
Decreases two times
Decreases four times
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One half
Twice
Four times
One fourth
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Increases two times
Increases four times
Decreases two times
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A series RLCcircuit consists of a 10 resistor in series with L = 10 Ha and C= 100 F. Determine a new value of Ia for which the resonant frequency is one ±half the original value.
40 H
40 mH
40 pH
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Peak
Average
Rms
Instantaneous
A factor that states how much the resistance changes for a change in temperature?
Resistivity
Specific resistance
Coefficient of temperature change
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Reactive factor
Quality factor
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Length
Material type
Temperature
Cross-sectional
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Mass
Moisture content
Temperature
Thickness
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0 + j 300
300 + j 90
0 ± j 300
300 +j 0
An alloy composed of 84 % coppera 12 % manganese and 4 % nickel.
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Constantan
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Decreases
Increases
Decreases or increases
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Negative to positive
Negative to negative
Positive to negative
Positive to positive