Electricity for the 4-H Scientist
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IDAHO Agricultural Extension Service
BULLETIN 396 JUNE, 1962 T-1
Safety Uses Economy
DIVISION I 4-H ELECTRIC
UNIVERSITY OF IDAHO College of Agriculture
The minimum goals for credit in the 4-H Electric project vary according to the 4-H member's age and the number of years he or she has taken the electric project. For example, if you are a 4-H member beginning the 4-H Electric project at the age of 10, you will not be required to earn as many credit points as a 14-year-old 4-H member beginning the 4-H Electric project. However, if you are a 12-year-old in your second year of electricity you must earn as many credit points in that year as a 14-year-old does in his or her first year.
Each lesson or goal has been designated a certain number of credit points. These are shown near the title of each lesson or goal. You decide on the lessons you want to study, list them, and add up the credit points.
For a full year's 4-H project credit, the total of your credit points should be at least as many as shown in the following table:
Examples of reading the table below are as follows: (a) An 11-year-old member is required to complete 13 credit points the first year, (b) A 14-year-old is required to complete 17 credit points his first year, (c) A 14-year-old taking the electric project for the third year must complete 16 credit points that year.
We recommend that, if you are taking the 4-H Electric project, you start with the first lesson in the book and go on through to the back of the book in advanced years. But you may skip the less important or less interesting parts so long as you learn the basic lessons. A way to find out whether you know the basic lessons is to read them through and try to answer all questions under the heading What Did You Learn. If you can answer these questions you may not wish to spend the time doing the things listed under What To Do.
Eric B. Wilson
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ELECTRICITY for the 4-H scientist
HOW TO USE THIS BOOK IN FULFILLING THE GOALS OF THE 4-H ELECTRIC PROJECT FOR THE FIRST AND SUCCEEDING YEARS
TABLE OF CONTENTS
LESSON NO. B-1
Electrical Conductors
Electrical Insulators
Play It Safe
Electrical Terms
WHAT TO DO: Make A Circuit Board
Parallel Wiring
Series Wiring
SUGGESTED DEMONSTRATIONS
Water And Electricity
For More Information
What Did You Learn?
LESSON NO. B-2
Basic Tools for Electrical Work
WHAT TO DO: Build a Tool Chest
Demonstrations You Can Give
For Further Information
LESSON NO. B-3
What's In A Lamp?
WHAT TO DO—Rewire A Lamp
How To Do It:
What Did You Learn?
SUGGESTED DEMONSTRATIONS
For More Information
LESSON NO. B-4
What Size Cord?
Cord, Plug and Guard
How to Make the Trouble Light
What Did You Learn?
Ideas for Demonstrations and Exhibits
For More Information
LESSON NO. B-5
Motors Are Magnets
We Can Improve It
We Need An Electromagnet
Switching Poles Automatically
Increasing Efficiency
WHAT TO DO: Make A Motor
Step No. 1-Armature
Step No. 2-Commutator
Step No. 3-Field
Step No. 4—Armature Supports and Brushes
Demonstrations You Can Give
For Further Information
LESSON NO. B-6
You'll Need
WHAT TO DO
What Did You Learn?
Demonstrations You Can Give
For Further Information
LESSON NO. B-7
READING THE ELECTRIC METER
Reading a Meter
What's Your Electric Bill?
Estimating Operating Costs
Adding Low Cost Helpers
WHAT TO DO: Find the Cost of Operating Electrical Equipment
Demonstrations You Can Give
For Further Information
LESSON NO. B-8
Important Things to Know
The Iron and Safety
WHAT TO DO: Learn About Your Iron
IRONING IS FUN
Demonstrations You Can Give
For More Information
LESSON NO. B-9
WHAT TO DO:
SAFETY TIPS
4-H Electric Hazard Hunt Guide
How Many Hazards Did You Find?
Demonstrations You Can Give
For Further Information
LESSON NO. B-10
HOW ELECTRIC BELLS WORK—FOR YOU
What to Do
Bells and Buzzers Can Tell a Lot
Why They Buzz or Ring—Electromagnetism
A Special Kind of Electricity
How to Control Them
Pick the Right Bell or Buzzer
How to Plan Your System
Materials You'll Need
Install According to Your Plan
Demonstrations You Can Give
For More Information
LESSON NO. B-11
What to Do
Electricity Can Kill
Prevent Accidents
Think, Then Act
First Aid
Mouth-To-Mouth Rescue Breathing
What Did You Learn? True or False
Demonstrations You Can Give
For More Information
LESSON NO. B-12
What to Do
"Resistance" Makes Heat
Make a Simple Resistance Heater
Conduction is "Touching" Heat
Convection Depends on Air
Radiation is Like the Sun
Make Popcorn 3 Ways
What Did You Learn?
LESSON NO. B-13
What to Do
"See" a Magnetic Field
Make an Electro-Magnet
Make a Permanent Magnet
See How They Attract and Repel
Make Many From One
Magnetism and Animals
What Did You Learn?
LESSON NO. B-14
What to Do
Count Your Electrical Blessings
Some Homes Are Behind Times
Watch for Signs of Starvation
Each Circuit Big Enough
Only One Fuse Size Right
Make a Circuit Chart
Check the Wire Sizes
Replace Any Wrong-Size Fuses
Talk it Over With Your Parents
What Did You Learn?
Demonstrations You Can Give
For More Information
LESSON NO. B-15
What to Do
How They Work
Detect a Magnetic Field
Detect a Tiny Current
Make a Simple Galvanoscope
Measure the Voltage of Batteries
Test for Induced Current
What Did You Learn?
Demonstrations You Can Give
For More Information
