ELECTRICITY INVESTIGATION (WEB)

Use the Internet to follow some basic tutorials on electricity

Physics Module on Electricity and Magnetism at:

http://ippex.pppl.gov/interactive/electricity/default.htm

Do all the modules at this site!

Simulation of electric forces

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

Simulation of fields

http://www.colorado.edu/physics/2000/waves_particles/wavpart3.html

Simulation of electric motor

http://www.walter-fendt.de/ph14e/electricmotor.htm

AC vs. DC current

http://www.school-for-champions.com/science/ac.htm

How a generator works and how energy is transmitted

http://www.energyquest.ca.gov/story/chapter06.html

http://www.energyquest.ca.gov/story/chapter07.html

Lesson 3 Chap 11-14 Electricity with tutorials and sample quizzes

http://library.thinkquest.org/10796/

The motor effect (part of our lab)

http://www.exploratorium.edu/snacks/motor_effect.html

USE YOUR WEB TUTORIALS AND READING TO EXPLAIN THESE CONCEPTS!

ELECTRIC CHARGE

ELECTROMAGNETIC FORCE

ELECTROMAGENTIC FIELD

POTENTIAL DIFFERENCE (VOLTAGE)

CURRENT

DC/AC

MOTOR

GENERATOR

RESISTANCE

POWER

CIRCUIT

ELECTRICITY QUESTIONS:

Conceptual Challenge page 637

1. The electric force is significantly stronger than the gravitational force. However, although we are attracted to Earth by gravity, we do not usually feel the effects of the electric force. Explain why.

2. An ordinary nickel contains about 10²⁴ electrons, all repelling each other. Why don’t those electrons fly off the nickel?

3. When the distance between two charged balloons is doubled, by what factor does the repulsive force between them change?

Read Sec 19-1 Do Section Review pg 699

1. Can the direction of conventional current ever be opposite the direction of charge movement? If so, when?

2. The charge that passes through the filament of a certain light bulb in 5 sec is 3 Coulombs.

a) What is the current in the light bulb? B) How many electrons pass through the filament of the light bulb in 1 min (60 sec)?

3. In a conductor that carries a current which is less, the drift speed of an electron, or the average speed of the electron between collisions?

4) What are the functions of batteries and generators?

5) In direct current, charge carriers have a drift velocity, but in alternating current, there is no net velocity of the charge carriers. Explain why. Why does this help explain why batteries wear out?