Mid-Semester Deck

Question 1

KVL states that?

Answer 1

For a loop:

Sum of voltage rise = sum of voltage drop

Question 2

KCL states that?

Answer 2

At a node:

Sum Current in = Sum current out

Question 3

For a battery or current source power is…

Answer 3

Power is negative unless a voltage drop occurs in a battery where current flows against the battery (From positive to negative)

Question 4

Conductance equation and units

Answer 4

G=1/R siemens

Question 5

When solving a mesh equation…

Answer 5

Batteries are V-rise but positive if current flows from - to + and negative is + to -. Resistors simply go on the voltage drop side

Question 6

When solving resistance thevenin what 2 things do you have to remember

Answer 6

1. Draw the eye and “look in” to the circuit

2. Remember to think logically based off path of easiest travel (e.g. path of no resistors)

Question 7

Current norton equation

Answer 7

Current (n) = V(th)/R(th)

Question 8

Description of a norton circuit

Answer 8

Current source of R(n) in parallel with R(th)

Question 9

When using superposition what 3 steps are there

Answer 9

1. Deactivate current sources by removing them and solve nodal currents and voltages
2. Deactivate voltage sources by drawing a wire through them and solve nodal currents and voltages
3. Add currents and voltages from both steps together

Question 10

Voltage divider law

Answer 10

V(drop)=V(supply)*[R(interest)/R(tot)]

Question 11

Current divider law

Answer 11

I(branch)=I(Supply)*[R(tot)/R(branch)]

Question 12

The critical thing when using the voltage or current divider law is?

Answer 12

The Resistor ratio needs to be less than 1

Question 13

Equations and units of capacitors (Without impedance)

Answer 13

1. Farad
2. q=CV&raquo_space;> I=C(dV/dt)
3. E=0.5(C*V^2)

Question 14

Equations and units of inductors (Without impedance)

Answer 14

1. Henries
2. V=dI/dt *L (Similar to V=IR)
3. E=0.5(L*I^2)

Question 15

How are capacitors added?

Answer 15

Capacitors are the opposite of resistors where:
C(Parallel)=C(1)+C(2)
C(Series)=(1/C(1)+1/C(2))^-1

Question 16

How are inductors added?

Answer 16

Inductors are like resistors:
L(Parallel)=(1/L(1)+1/L(2))^-1
L(Series)=L(1)+(2)

Question 17

Impedance for a capacitor and its unit

Answer 17

Z=-j/(wC) Ohms

Capacitors are complex

Question 18

Impedance for a inductor and its unit

Answer 18

Z=jwL Ohms

Inductors are simple

Question 19

Capactiors are…

Answer 19

Two plates that are positioned closely together and act as a battery

Question 20

Inductors are…

Answer 20

Coil of wire that produces a magnetic field

Question 21

To figure out the load line use:

Answer 21

Use nodal voltage

Question 22

Inductors are like…

Answer 22

Resistors as they add like them and
V=IR and V=dI/dt *L
Inductors are simple

Question 23

Capacitors are like…

Answer 23

Complex