# Cool Labs

##### Similar and Dissimilar Charges

Purpose: To compare the responses of objects with similar and dissimilar charges. Summary: Students use a hand-crank Van de Graaff Generator to charge different objects to determine whether they attract or repel each other. Question: Do objects with a similar...

##### What is a Magnet?

In this investigation, students will first experiment with an ordinary bar magnet and describe its effects on a compass and a tube of iron filings. The second part of the lab challenges students to create a temporary magnet out of...

##### Light a Bulb Inquiry

This simple inquiry lab challenges students to light a mini bulb using only a battery and one short wire. Even students who have seen circuit diagrams may be stumped when they have only one wire. Students will also discover how...

##### Conductors and Insulators

Electricity is the flow of electrons through a substance. Those materials permitting this flow are called conductors; those which do not are nonconductors (or insulators). Among those materials which are conductors, some are better at conducting electricity than others. In...

##### Genecon and Lost Energy

Talk about hands on! Students love interacting with Genecons. There's such a direct connection between cranking the handle and producing electricity. In my energy conservation unit, for example, students can experience energy as electrical current plus heat, sound and electromagnet...

##### Lab #35.1 Electricity and Magnetism: Batteries and Bulbs

Lab #35.1   Electricity & Magnetism: Batteries & BulbsPurposeIn this activity, students will explore various arrangements of batteries and bulbs, and the effects of those arrangements on bulb brightness. DiscussionMany devices include electronic circuitry, most of which are quite complicated....

##### Lab #34.1 Electricity and Magnetism: Ohm, Ohm on the Range

PurposeIn this experiment, students will arrange a simple circuit involving a power source and a resistor. They will attach an ammeter and a voltmeter to the circuit. They will measure corresponding values of current and voltage in the circuit. They...

##### The Real Simple Motor

The World's Even More Simple Motor How it Works … This simple Homopolar Motor shows how moving charges (an electric current) experience a force when they move through a magnetic field. When the wire is in place, current flows from...

##### Series Circuits

Several properties of a series circuit will be demonstrated in this experiment. The primary concepts to be covered are: Lamps in series reduce current flow. Lamps in series increase the total resistance of the circuit. The voltage across each bulb...