Electricity & Magnetism Electricity

Beginning Task: Trade Science Fair Assignment #4 with your partner Use the Peer Review Form to provide feedback to your partner describing how they can improve their procedure. Return Peer Review Form and Rough Draft to your partner READ THEIR FEEDBACK ask questions if you have them (15 minutes)

Entry Task: What is electricity? How does a light switch turn the lights on and off?

What is Electricity? Electrons Moving

Let there be LIGHT! Use the materials provided to light up the bulb.

What did you have to do to light the bulb?

Simple Circuit Source of electrical potential Conductive path An object that uses electricity to do work (a resistor)

Let there be LIGHT, LIGHT! Can you light more than one bulb with the same battery?

One Way In “Series” -Several components one after the other -Connected so an individual charge will pass through each component.

Another Way In “Parallel” -Again, several components -Connected so that a single charge will pass through only one of the components

Build both circuits and compare How does the brightness of the bulbs compare? What happens when one bulb “breaks” (unscrew or use “faulty bulb”)

Tollbooth Analogy

In series, electrons must move through two tollbooths Slows progress (more resistance) If one closes, no cars move through the other either (charge cannot flow) In parallel, electrons move through just one tollbooth & have choices! Speeds progress (less resistance) If one closes, cars move through the other (charge still flows)

Homework: Complete Final Draft of Science Fair Assignment #4 Due 12/10