Week 5 Day 1

Units to be measured and calculated VoltageVoltsV or E ResistanceOhmsR or Ω Current AmpsI or A PowerWattW or P

Average score 22.5 = 90%

Multisim lab test.

Work more than 2 weeks past due date may receive zero.

Chapter 6 DIVIDER CIRCUITS AND KIRCHHOFF’S LAWS 6.1 Voltage divider circuits Page Kirchhoff’s Voltage Law (KVL) – 183 Page 184 – Current divider circuit Kirchhoff’s Current Law (KCL) Contributors

Textbook page 172 From the given values of individual resistances, we can determine a total circuit resistance, knowing that resistances add in series:

Textbook page 172 From the given values of individual resistances, we can determine a total circuit resistance, knowing that resistances add in series:

Textbook page 172 From here, we can use Ohm’s Law (I=E/R) to determine the total current. Know that currents are equal in all parts of a series circuit:

Textbook page 172 Knowing that the circuit current is 2 mA, we can use Ohm’s Law (E=IR) to calculate voltage across each resistor:

Textbook page 180 V AB

Textbook page 180 V AB

Kirchhoff’s Voltage Law (KVL) The algebraic sum of the potential rises and drops around a closed path (or closed loop) is zero. Textbook page 179

Ground

abab

Switch

Rotary Switch

Button switches

Switch

5.3 Simple parallel circuits page 139 Experiment 4 Series circuits Experiment 5 Series circuits (con’t) Experiment 6 Parallel circuits week 6.

Page 131 This is just a preview of things to come. Don’t worry! We’ll explore all these circuit configurations in detail, one at a time!

PARALLEL RESISTORS Two elements or branches are in parallel if they have two points in common.

Week 5 Textbook page 172 Know that currents are equal in all parts of a series circuit:

Textbook page 139 The first principle to understand about parallel circuits is that the voltage is equal across all components in the circuit.

Textbook page 141 The second principle of parallel circuits: the total circuit current is equal to the sum of the individual branch currents.

Textbook page 141 The total circuit resistance in a parallel circuit is less than any one of the individual resistors.

Chapter 6 page 193 Parallel circuits proportion, or ”divide,” the total circuit current among individual branch currents, the proportions being dependent upon resistances.

We will use Resistance Ω not Conductance G By finding the reciprocal of the resistance of a material, we have a measure of how well the material conducts electricity. This is conductance, G, S and is measured in siemens.

Textbook page Conductance Mho (Ohm backwards) G, S, siemens.

Lab 5 Series Circuits (continued)