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