Series resonance occurs when
XL= XC
XL= R
Z = R
Both A and C
Correct Answer :
D. Both A and C
Related Questions
Points to be considered in choosing a capacitor
Working voltage
Type of dielectric
Capacitance
All of the above
A law which states that when a constant electromotive force is applied to a circuit consisting of a resistor and capacitor connected in seriesa the time taken for the potential on the plates of the capacitor to rise to any given fraction of its final value depends only on the product of capacitance and resistance.
Child�s law
CR law
Coulomb�s law
Debye T3 law
The rms value of a triangular or sawtooth waveform is ___ tim value.
A capacitor requires 12 C of charge to raise its potential of 3 V. What is the capacitance of the capacitor?
36 F
15 F
0.25 F
4 F
A series RLCcircuit has a ______ power factor at its half-power points
Unity
Leading
Lagging
Either B or C
What is the conductance of a circuit having three 10 resistors in parallel?
0.3 S
3.33 S
0.33 S
30 S
What is the total resistance of a two equal valued resistors in series?
The difference of both
The product of both
Twice as one
The sum of their reciprocals
In a series RLCcircuit
The current lags VLby 90�
The current leads VLby 90�
XL leads Xcby 90�
Z = jXL at resonance
Which of the following is a disadvantage of a wire-wound resistor?
It has reactance in radio-frequency circuits
It cannot handle much power
It draws a large amount of current
It cannot handle high voltage
When current and voltage arte in phase in an ac circuita the ___ is equal to zero.
Resistance
Reactance
Inductance
Capacitance
Which is considered as the effect of a dielectric material?
Increasing capacitance
Decreasing capacitance
Reducing the working voltage
Increasing the distance between the plates
If two complex conjugates are addeda ___ components results.
In-phase
Quadrature
Complex
Outof-phase
For a series circuita the higher the quality factor
The greater the bandwidth
The narrower the passband
The broader the resonance curve
The wider the passband
At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 F?
7.12 kHz
7.12 Hz
7.12MHz
7.12 GHz
Which of the following is not considered a physical factor affecting resistance?
Length
Material type
Temperature
Cross-sectional
The internal resistance of an ideal current source is
Infinite
Zero
Equal to the load resistance
To be determined
In a multiple capacitora the plate area is
Increased
The same
Decreased
Variable
The charging of a capacitor through a resistance follows what law?
Linear law
Hyperbolic law
Inverse-square law
Exponential law
The usual load of a dc circuit is a/an
Resistor
Capacitor
Inductor
Both inductor and capacitor
When two in-phase sine waves that have identical frequency and amplitude are added togethera then the result is a sine wave with ___ the amplitude of either.
Half
Twice
Four times
One-fourth
Which of the following is not a factor affecting dielectric strength?
Mass
Moisture content
Temperature
Thickness
If one resistance in a series connection is opena then
The current is zero in all the other resistances
The current is maximum in all the other resistances
The voltage is zero across the open resistance
The voltage is infinite across the open resistance
Which of the following conditions is not true for a series RLCcircuit at resonance?
Z = jXL
XL= XC
The power factor is one
The magnitude of Z is
The factor 0.707for converting peak to rms applies only to
Square waves
Triangle waves
Sawtooth waves
Sine waves
The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.
Algebraic
Arithmetic
Vector
Phasor
A linear circuit is one whose parameters
Change with change in voltage
Change with change in current
Do not change with voltage and current
Change with change in voltage and current
What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?
14.5 kHz
145 MHz
14.5 MHz
145 kHz
In dividing or multiplying phasor quantitiesa ___ form is used.
Polar
Rectangular
Trigonometric
Exponential
As applied to a series RLCcircuita bandwidth means
The frequency range for maximum power transfer
The difference between the highest and lowest frequencies of the oscillator
The separation of the half-power points
The frequency at which XL= XC
An open resistor when checked with an ohmmeter reads
Zero
Infinite
High but within the tolerance
Low but not zero