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Introductory Concepts in Physics
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1.

Atmospheric Pressure

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VHS
1987
Ivy (By Request)
2.

Electromagnetic Induction

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Demonstrations prove that when two coils are placed near each other, any change in the flow of electric current in the primary coil will induce a current in the secondary coil. Experiments explore the factors that increase the induced current, illustrating the relationship between the number of rings in a coil and the ratio of voltage applied to the amount of electricity induced.
VHS
1987
Ivy (By Request)
3.

Direct & Alternating Current

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Two neon lamps, one connected to a battery and the other connected to an alternating current power source, are employed to demonstrate the difference between direct current (DC) and alternating current (AC). A selenium rectifier is used to change AC to DC and to set a model car in motion.
VHS
1987
Ivy (By Request)
4.

Magnetism & Electricity: Practical Applications

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Several experiments conducted within a one-cubic-meter magnetic field produced by a powerful magnet explain the forces operating when an electric current flows through a magnetic field.
VHS
1987
Ivy (By Request)
5.

Fresnel Lenses

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Experiments with a Fresnel lens demonstrate the properties of conventional convex lenses. Also discussed are some of the practical aspects of Fresnel lenses.
VHS
1987
Ivy (By Request)
6.

The Image

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VHS
1987
Ivy (By Request)
7.

Dry Cell Batteries & Light Bulbs

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Experiments with light bulbs demonstrate the existence of positive and negative terminals in dry cell batteries. Comparisons are made between the output of one or more battereies, and batteries connected in series and in parallel. Also illustrated is the principle that when an electric current is produced, heat is also produced.
VHS
1987
Ivy (By Request)
8.

Uses of the Electromagnet

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A series of experiments explain aspects of electromagnetism. The program also discusses the practical applications of electromagnets in such everyday objects as a doorbell.
VHS
1987
Ivy (By Request)
9.

Magnetic Fields

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VHS
1987
Ivy (By Request)
10.

Creating Magnetic Force

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A series of experiments demonstrates that magnetic force is created when electricity flows. Therefore, a compass can be used to indicate if current is flowing through a wire; the compass can also indicate the direction of the flow of current. Experiments in this program also prove that a wire acts like a magnet when electric current is flowing through it.
VHS
1987
Ivy (By Request)
11.

Introduction to Magnets

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Demonstrations of magnetic attraction are performed on everyday objects.
VHS
1987
Ivy (By Request)
12.

Creating Magnetic Fields

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VHS
1987
Ivy (By Request)
13.

Mirror and Image

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VHS
1987
Ivy (By Request)
14.

Gathering Light

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VHS
1987
Ivy (By Request)
15.

Bipolarity

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The basic characteristics of magnetic poles are demonstrated in this program. Several experiments are performed with red and blue bar magnets with clearly identified poles. A concluding experiment carried out with a donut-shaped ring magnet emphasizes the nature of magnets and the property of bipolarity.
VHS
1987
Ivy (By Request)
16.

The Generation of Current

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Thin, freely moving iron needles are placed on a panel between the north and south poles of a powerful magnet; the magnetic field is clearly apparent. When a copper wire breaks the lines of magnetic force, an electric current is generated in the wire. Model cars illustrate that when a magnet is placed so that a revolving coil interrupts the magnetic field, a current is generated.
VHS
1987
Ivy (By Request)
17.

Inertia

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The meaning of inertia is demonstrated through experiments and examples.
VHS
1987
Ivy (By Request)
18.

The Magnet as Compass Needle

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A compass needle acts as does an ordinary magnet, aligning itself north/south. One of the experiments performed in this program demonstrates how to make a compass needle. Demonstrations also include the north/south alignment of a bar magnet floating in a tank of water, the proper use of a compass needle and the accurate reading of a ship's compass.
VHS
1987
Ivy (By Request)
19.

Lenses

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VHS
1987
Ivy (By Request)
20.

Diffraction of Light

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This program discusses the phenomenon of light diffraction. When an object is placed in the path of a beam of light traveling in a straight line, some of the changes direction.
VHS
1987
Ivy (By Request)