EE 305 Final

A non-inverting amplifier

provides a positive voltage gain

You have a circuit with four sources embedded. To find the total current through one of the resistors you use the principle of superposition. For this you take the following steps:

step 1: turn off all sources step 2: turn one source on step 3: find the requested current with the single source in the circuit step 4: turn the one source off again step 5: if you haven't turned on all sources yet, go back to step 2 and repeat with next source, otherwise proceed to step 6 step 6: add all solutions together to find the total current through the resistor

A band stop filter is designed to

stop all frequencies within a band of frequencies, w1< w<w 2

when using the concept of "virtual zero" we assume

that no currents enter or leave the input terminals and there is no voltage difference between the two input terminals.

You can use the dummy version of mesh current analysis to find the unknown mesh currents when

there isn't an ideal current source in the circuit

You have a circuit with three sources. To find the total voltage across one specific resistor using the principle of superposition you need to find the voltage across this resistor

three times and add up the results

A capacitor is a device

which stores electric energy.

An inductor is a device

which stores magnetic energy.

Given is the following complex number: z1 = √2 + j √2 (both numbers are square root of 2) This number is given in the polar form by

z1 = 2e^jπ/4

The impedance of an inductor in series with a capacitor is given by

ZLCseries = jωL + 1/jωC

The impedance of a resistor is given by

ZR = R

Given is a parallel plate capacitor. It has a capacitance C1. If we reduce the distance between the plates to half of the original distance the new capacitance C2 is given by

C2 = 2C1

Given is a parallel plate capacitor. It has a capacitance C1. If we double the distance between the plates the new capacitance C2 is given by

C2 = C1/2

We have two series capacitors, C1 and C2. The equivalent capacitance is

Ceq = (C1C2)/(C1 + C2)

Given is a long cylindrical coil. It has an inductance L1. If we double the cross section of the coil the new inductance L2 is given by

L2 = 2L1

Given is a long cylindrical coil. It has an inductance L1. If we double the number of windings the new inductance L2 is given by

L2 = 4L1

Given is a long cylindrical coil. It has an inductance L1. If we double the length of the coil the new inductance L2 is given by

L2 = L1/2

We have two parallel inductors, L1 and L2. The equivalent inductance is

Leq = (L1L2)/(L1 + L2)

We have two series inductors, L1 and L2. The equivalent inductance is

Leq = L1 + L2

The peak-value phasor corresponding to the following signal v(t) = 25V cos(ω t + π/4)

V = 25Ve^jπ/4

complex power is measured in

VA

reactive power is measured in

VAR

admittance of an inductor between two nodes

Y = -1/(jωL)

admittance of a capacitor between two nodes

Y = -jωC

The admittance of a capacitor and a resistor in parallel is given by

YC||R = jωC + 1/R

The admittance of an inductor in parallel with a capacitor is given by

YL||C = 1/jωL + jωC

The admittance of a resistor is given by

YR = 1/R

The admittance of a resistor in parallel with an inductor is given by

YR||L = 1/R + 1/jωL

The impedance of a capacitor is given by

ZC = 1/jωC

An ideal capacitor is

a passive element

An ideal inductor is

a passive element

To zero out a voltage source it must be replaced by

a short circuit

An operational amplifier is

an active element

To zero out a current source it must be replaced by

an open circuit

You want to choose the signal of one particular TV station. What kind of filter do you use:

band pass

A quantity that contains all the power information in a given load is the

complex power

an inductor

consists of of a coil usually wound around a core material.

The two input terminals of an operational amplifier are labeled as:

inverting and non-inverting

Usually the feedback loop connects the output terminal with the negative input terminal. This is called

negative feedback

an active filter consists

of an op-amp and the elements R,L, and C.

A passive filter consists

of the elements R,L, and C.

A low pass filter is designed to

only pass frequencies from DC (0Hz) up to the cutoff frequency wc.