Moja lekcja

the magnitude of the line voltage of a Y - connected generator is

1.73

balanced load means

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

V(s)=(1/sC)*I(s)+v(0)/s

According to the definition, the electric field strength is described by formula

F/Q

cut-off frequency of the RC filter is equal

1/(2pi*R*C)

The energy stored by an inductor can be described as

WL = 1/2 L Im^2

which property of the logarithm is true

log10(a*b)=log10(a)+log10(b)

The quality factor (Q) of the resonant circuit is described by the general formula:

q=req/ave

According to the maximum power transfer theorem, a maximum power will be delivered to a load when the load impedance is:

A conjugate of the Thevinin impudance across the terminals

The time constant of the R-L circuit is described as:

τ = L/R.

According to the definition, a capacitance is described by formula:

C=Q/V

The resonant condition of the RLC circuit is described as:

XC = XL

For an ideal capacitor, what is a value of dissipated energy when the voltage is supplied to it?

Wc = 1/2 CV^2

According to the definition, the electric field strength is described by formula:

Ę = F/Q

For charging phase of the R-C network, the current iC is determined by formula:

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?

6.242 E18

What is a starting mechanism of current flow?

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.

Superposition Theorem

The algebraic sum of the currents entering and leaving a junction of the network is zero.

kirchoffs current law

The definition of 1 volt is properly described by following equation:

V = W/Q

The relative permeability for diamagnetic materials is:

ur < 1

For an ideal capacitor, what is a value of dissipated energy when the voltage is supplied to it?

Wc = 1/2CV^2

if you move the conductor through field at right angles to the magnetic flux you will generate the...

Maximum inducted voltage

The Coulomb’s law, between Q1 and Q2 charges at a distance r, is described by formula:

F = k * (Q1Q2 / r^2)

The reactive power Q can be described as...

Power absorbed or returned by capacitor

The maximum value of the waveform measured from its average or mean value is called...

Peak amplitude

The higher value of sensitivity level of the resistor to temperature [ppm/°C] means

higher resistance changes due to temperature differences

The phase relationship between voltage and current for an inductor can be described as:

iL leads vL by 90°(probably)

Depicted Z =f(f) function (impedance vs. frequency) represents the practical equivalent for...

capacitor

For an ideal capacitor, what is a value of dissipated energy when the voltage is supplied to it?

wc=1/2CV^2

Which of the expressions does not describe the magnitude of average power (for sinusoidal waveform)?

P = Wm Im cos 0