Electrical Energy and Circuits

N. SassamanSAMS - 2011

VOCABULARY, VOCABULARY, VOCABULARY!!

List in notes, atomic particles, units of measurement.

Matching

Examples of conductors, insulators

Change resistance in a wire…

Charged particles and interaction

Series vs. parallel circuits◦ Switch placement, added bulbs and affect on

current, brightness, overall resistance.

Ohm’s law (VIR relationships)

Multiple Choice

Formulas will be given!!

Be sure to SHOW YOUR WORK!◦ Formula◦ Values in formula◦ Final answer with correct units of measurement

Calculations

CIRCUITS!!

Identify series vs. parallel circuits

Know how parts of the circuit affect the whole

Interpret Diagrams

Three (3) to choose from…you do ONE (1)!

Circuits – general and series vs. parallel

Conductors and insulators

Short Answer

- Electric Charge and Static Electricity

Charges that are the same repel each other. Charges that are different attract each other.

Electric Charge http://www.colorado.edu/physics/2000/waves_particles/wavpart2.html

- Electric Charge and Static Electricity

An electric field is a region around a charged object where the object’s electric force is exerted on other charged objects.

Electric Force

- Electric Current

Electric current is the continuous flow of electric charges through a material. http://www.rkm.com.au/animations/animation-electrical-circuit.html

Flow of Electric Charges

- Electric Current

An electric circuit is a complete, unbroken path through which electric charges can flow.

An Electric Circuit

- Electric Current

Two factors that affect the resistance of water flowing in a pipe are diameter and length. The diameter and length of a wire also affect resistance in a circuit.

Resistance http://www.thetech.org/exhibits/online/topics/10a.html

Ohm’s Law

http://www.teachersdomain.org/asset/hew06_int_ohmslaw/

V = I RR = V/II = V/R

- Electric Circuits

Simple symbols are used to diagram a circuit.

Features of a Circuit http://www.physicsclassroom.com/class/circuits/u9l4b.cfm

(video) http://www.teachersdomain.org/asset/rr10_vid_seriespar/

- Electric Circuits

In a series circuit, there is only one path for the current to take.

Overall resistanceis additive.

Dimmer lights

“If one light goes out, they all go out!”

Series Circuits

- Electric Circuits

In a parallel circuit, there are several paths for the current to take.

Each path is independent of the others.

Brightness same as if only one bulb.

Parallel Circuits

- Electrical Safety

One way to protect people from electric shock and other electrical danger is to provide an alternate path for electric current.

Grounding