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Pytanie Odpowiedź
the magnitude of the line voltage of a Y - connected generator is
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1.73
balanced load means
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z1=z2=z3
The algebraic sum of the currents entering and leaving a junction of the network is zero. This is a: citor in the s-domain is described by
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V(s)=(1/sC)*I(s)+v(0)/s
According to the definition, the electric field strength is described by formula
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F/Q
cut-off frequency of the RC filter is equal
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1/(2pi*R*C)
The energy stored by an inductor can be described as
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WL = 1/2 L Im^2
which property of the logarithm is true
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log10(a*b)=log10(a)+log10(b)
The quality factor (Q) of the resonant circuit is described by the general formula:
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q=req/ave
According to the maximum power transfer theorem, a maximum power will be delivered to a load when the load impedance is:
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A conjugate of the Thevinin impudance across the terminals
The time constant of the R-L circuit is described as:
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τ = L/R.
According to the definition, a capacitance is described by formula:
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C=Q/V
The resonant condition of the RLC circuit is described as:
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XC = XL
For an ideal capacitor, what is a value of dissipated energy when the voltage is supplied to it?
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Wc = 1/2 CV^2
According to the definition, the electric field strength is described by formula:
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Ę = F/Q
For charging phase of the R-C network, the current iC is determined by formula:
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Ic = Io*e^-t/RC
How many electrons have to pass through a copper wire in 1 second to get a 1 ampere of current?
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6.242 E18
What is a starting mechanism of current flow?
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Applied voltage
The current through, or voltage across, any element of a network is equal to the algebraic sum of the currents or voltages produced independently by each source.
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Superposition Theorem
The algebraic sum of the currents entering and leaving a junction of the network is zero.
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kirchoffs current law
The definition of 1 volt is properly described by following equation:
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V = W/Q
The relative permeability for diamagnetic materials is:
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ur < 1
For an ideal capacitor, what is a value of dissipated energy when the voltage is supplied to it?
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Wc = 1/2CV^2
if you move the conductor through field at right angles to the magnetic flux you will generate the...
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Maximum inducted voltage
The Coulomb’s law, between Q1 and Q2 charges at a distance r, is described by formula:
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F = k * (Q1Q2 / r^2)
The reactive power Q can be described as...
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Power absorbed or returned by capacitor
The maximum value of the waveform measured from its average or mean value is called...
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Peak amplitude
The higher value of sensitivity level of the resistor to temperature [ppm/°C] means
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higher resistance changes due to temperature differences
The phase relationship between voltage and current for an inductor can be described as:
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iL leads vL by 90°(probably)
Depicted Z =f(f) function (impedance vs. frequency) represents the practical equivalent for...
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capacitor
For an ideal capacitor, what is a value of dissipated energy when the voltage is supplied to it?
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wc=1/2CV^2
Which of the expressions does not describe the magnitude of average power (for sinusoidal waveform)?
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P = Wm Im cos 0

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