ECE 330 || FINAL EXAM
admittance
1/impedance
suceptance
1/reactance
conductance
1/resistance
Balanced phase voltages are out of phase with each other by ______ degrees.
120
Order from largest to smallest: 1 - R 2 - R||R 3 - R in series with R
312
In a 1st order RC circuit, when does the transient response occur?
5 time constants
What is the current divider rule?
Io=Ii(R2/R1+R2)
the sum of the current into a node must be equal to the sum of the currents out of that same node
Kirchoff's Current Law
the sum of the voltage drops over any closed loop is equal to 0
Kirchoff's Voltage Law
__________ occurs when the load impedance (Z_L) is equal to the complex conjugate of the Thevenin impedance (Z_Th*)
Maximum average power transfer
current source in parallel with a resistor
Norton equivalent
voltage source in series with a resistor
Thevenin equivalent
What is the voltage divider rule?
Vo=Vi(R2/R2+R1)
What type of circuit is used to determine value of unknown resistance?
Wheatstone Bridge
What is the impedance of a capacitor?
Z=1/jwC
What is the impedance of an inductor?
Z=jwL
Transfer Function Components : what is K?
constant
The process of increasing the power factor without altering the voltage or current to the original load is known as power factor ___________.
correction
α=ω0
critically damped
What cannot change instantaneously in an inductor?
current
Balanced phase voltages are _________ in magnitude.
equal
What is the Norton equivalent resistance?
equivalent resistance
What is the Thevenin equivalent resistance?
equivalent resistance
A ______-pass filter is designed to pass all frequencies above its cutoff frequency ωc
high
When a DC circuit is at equilibrium, inductors are analyzed as __________.
ideal wires
How does inductor impedance change with frequency?
increases with frequency
The ratio of the magnetic flux to the current is __________.
inductance
How is capacitor impedance related to frequency?
inversely proportional
What is the power drawn from one circuit and used by another?
load
A circuit that suppresses high-frequency signals is called a _____________.
low-pass filter
Power transfer is _________ when load resistance RL =RS
maximized
1) label ____ currents 2) solve easy ____(s) first 3) write KVL for each ____ 4) solve system of equations
mesh
The ability of one inductor to induce a voltage across a neighboring inductor
mutual inductance
If a current leaves the dotted terminal of one coil, the reference polarity of the mutual voltage in the second coil is ___________ at the dotted terminal of the second coil.
negative
1) assign reference ____ 2) assign ____ voltage names 3) solve easy ____(s) first 4) write KCL for each ____ 5) solve system of equations
node
when there is a break in a wire such that current cannot flow
open circuit
What is the Thevenin equivalent voltage?
open circuit voltage
Transfer Function Components zero or pole at the _________
origin
When α>ω0 in an RLC circuit, what is the natural response?
overdamped
A band-______ filter is designed to pass all frequencies within a band of frequencies, ω_1 < ω < ω_2.
pass
a complex number that represents the amplitude and phase of a sinusoid
phasor
If a current enters the dotted terminal of one coil, the reference polarity of the mutual voltage in the second coil is ____________ at the the dotted terminal of the second coil.
positive
The ratio of real to apparent power is the __________.
power ratio
Transfer Function Components _____________ poles or zeros
quadratic
The ratio of resonant frequency to bandwidth that decides how selective a circuit is the _____________.
quality factor
The imaginary part of a complex number representing a phasor is the _____________.
reactance
The frequency __________ of a circuit is the variation in behavior with a change in the frequency of the input signal.
response
Bode plots are _________ plots of the magnitude (in decibels) and phase (in degrees) of a transfer function versus frequency.
semilog
when current can flow between two points with no/little resistance such that the voltage potential is the same at both points
short circuit
What is the Norton equivalent current?
short circuit current
Transfer Function Components _________ pole or zero
simple
A band-______ filter is designed to stop or eliminate all frequencies within a band of frequencies, ω_1 < ω < ω_2.
stop
principle that the total output of a circuit with multiple inputs is the sum of the individual outputs for each input
superposition
Frequency response is the plot of the _____________ function vs ω.
transfer
four-terminal device comprising two or more magnetically coupled coils
transformer
α<ω0
underdamped
What cannot change instantaneously in a capacitor?
voltage
What is the significance of the time constant in a 1st order RC circuit?
when the transient response will occur