The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
Correct Answer :
D. Resonance curve
Related Questions
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
Under the conditions of maximum power transfera a voltage source is delivering a power of 15 W to the load. What is the power generated by the source?
60 W
30 W
15 W
4 W
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
If two equal resistances connected in series across a certain supply are now connected in parallel across the same supplya the power produced will be _____ that of series connection
One-half
One-fourth
Two times
Four times
Which of the following combination of length and cross-sectional area will give a certain volume of copper the least resistance?
2L and1/2 A
Does not matter because the volume of copper remains the same
L and A
½ L and 2 A
If an emf in circuit A produces a current in circuit Ba then the same emf in circuit Bproduces the same current in circuit ? this theorem is known as
Maximum power transfer theorem
Millman�s theorem
Reciprocity theorem
Norton�s theorem
VL= VCin a series RLCcircuit when
The value of the impedance is minimum
The power factor is zero
The current leads the total voltage by 90�
The total voltage is zero
How many degrees of phase represents one full cycle?
Which is considered as the effect of a dielectric material?
Increasing capacitance
Decreasing capacitance
Reducing the working voltage
Increasing the distance between the plates
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 charging of a capacitor through a resistance follows what law?
Linear law
Hyperbolic law
Inverse-square law
Exponential law
In liquids and gasesa ionization current results from a flow of
Positive or negative ions
Free electrons
Ions that are lighter in weight than electrons
Protons
Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the
V(m)2
V(m)
V/m2
V/m
What is the value of a carbon composition resistor with the following color code: Browna whitea orangea red
190 ; 10 %
19 k ; 2 %
19 k ; 20 %
1.9 k ; 2 %
When resistance are connected in parallela the total resistance is
Less than the smallest resistance in the connection
Greater than the smallest resistance in the connection
Between the smallest and greatest resistance in the connection
Increasing and decreasing depending upon the supply voltage
What is the hot resistance of a 100 Wa 220 V incandescent lamp?
In a complex resistance-reactance planea XLis represented
By an axis opposite the R axis
By an axis perpendicular to the XC axis
By an axis opposite the XCaxis
By an axis parallel to the R axis
The temperature coefficient of resistance of electrolytes is
Negative
Positive
Zero
Infinite
A factor that states how much the resistance changes for a change in temperature?
Resistivity
Specific resistance
Coefficient of temperature change
Temperature coefficient of resistance
Which of the following does not generally affect the value of a capacitor?
The dielectric material used
The surface area of the plates
The thickness of the dielectric
The voltage applied to the plate
Which of the following is a way of decreasing mutual inductance?
Moving the coils closer
Moving the coils apart
Decreasing the number of turns of either coil
Increasing the number of turns of either coil
The capacitor opposes any change in voltage across it by
Passing a voltage proportional to the rate of change of current
Acting as a short circuit at time equal to zero
Passing a current proportional to the rate of change of voltage
Acting as a short circuit at time equal to infinity
A capacitor consists of two
Conductors only
Dielectric only
Conductors separated by a dielectric
Dielectric separated by a conductor
The curve between current and frequency is termed as
Voltage curve
Gain curve
Power curve
Resonance curve
The potential gradient in a cable is maximum in
Conductor
Outer sheath
Insulation
Uniformly all over
Which factor does not affect resistance?
Length
Resistivity
Cross-sectional area
Mass
Which of the following is also known as antiresonant circuit?
Parallel resonant circuit
Series resonant circuit
Tuned circuit
Tank circuit
The current is ____ times the maximum current at half-power points of a resonance curve.
Which statement is true?
A series resonant circuit is of high impedance
A parallel resonant circuit is of low impedance
A series resonant circuit is inductive if it operates at a frequency higher than the resonant frequency
A parallel resonant circuit is inductive if it operates at a frequency higher than the resonant frequency
When two pure sine waves of the same frequency and the same amplitude which are exactly 180� outof-phase are added togethera the result is
A wave with twice the amplitude
A wave with half the amplitude
Zero signal
A wave with twice the frequency