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The study of electricity may be divided into three classes or
branches: magnetism, electrostatics, and electrodynamics.
Magnetism is the property of the molecules of iron and certain
other substances through which they store energy in a field of
force because of the arranged movement of the electrons in their
atoms. Electrostatics is the study of electricity at rest, or static
electricity. Examples of this type of electricity are charges on
condenser plates. Rubbing glass with silk produces static
electricity. Electrodynamics is the study of electricity in motion, or
dynamic electricity. The electricity that flows through wires for
light and power purposes is a good example of latter type of
electricity.

Step 3
Say what physical phenomenon the text is concerned with.

Step 4
Find the part of the text dealing with the fundamental forces of
nature.
Discuss the information with your fellow students.

Step 5
Answer the following questions embracing the contents of the text.
1. What is the way to charge a body negatively or positively?
2. What capacity did amber and glass acquire when rubbed with
silk or fur?
3. What is magnetism?
4. When were the basic quantitative laws of electricity and
magnetism discovered?
5. When did C. Coulomb investigate the forces between charged
objects?
6. When did M. Faraday discover magnetic induction?
7. What was invented by B. Franklin?

Step 6
Make up a short dialogue on the following situation:
1. A few students make an experiment with different materials to

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