Students use electrical devices every day. An essential safety component of any electrical device is the fuse. Demonstrate what it means to “blow a fuse” and show why fuses are important safeguards against electrical fires. Courtesy of Flinn Scientific Canada.
How fuses work – Click here to download
This very simple to perform demo can be made very memorable by ensuring the students see it as a discrepant event. Students are expecting to see a free fall but instead see a low terminal velocity with no obvious source of friction.
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The Hamilton Ontario – Tesla “Connection”
Did you know that the city of Hamilton was the 1st major city in Canada to have AC electrical power? Current flowed for the first time on August 25, 1898. All thanks to Nikola Tesla. Pretty cool, right?
The Nikola Tesla Education Corporation
The goal of this organization is to spread the knowledge about Nikola Tesla’s work to the public through various mediums, so that our youth can learn about the inventions and the body of knowledge he has left behind. Click here to find out more…..
50 000 Volts!
And for dessert, click on this Steve Spangler video for a cool Tesla Coil Experiment
Special thanks to Jelena of the STAO Secondary Committee for these electrifying thoughts on one of the most important inventors in recent history.
In this demo, two circuits are constructed to enable comparison of the brightness of a light bulb placed in a circuit with one cell and the brightness of the same light bulb in a circuit with three cells connected in parallel. In Next Steps the potential differences of the two circuits are also compared.
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Every dry cell can be considered as being made up of two parts. Internal Resistance cannot be separated from the cell because coulombs need energy to move through any real material (including cells). Coulombs need very little energy to move through conductors. When coulombs move through loads they need (or convert to other forms or lose) more energy. The more coulombs that move through something the more energy that is converted to other forms. Another way of saying this is; the more current flowing through something the more energy is lost.
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How fast is an electron in a wire and how fast is electricity? An electron moves surprisingly slow, slower than a snail, while electricity moves at near the speed of light. Electrons move at what’s called the drift velocity. This video illustrates all this in an entertaining and informative way. Enjoy! Continue reading
Global News Report.
We’ve all heard of electric cars, but imagine your home or business being powered by the same kind of battery. Tesla founder Elon Musk, the billionaire futurist and inventor who always pushes the limits, says he wants clean and green batteries to one day power the world.
This video provides and excellent analogy to explain the properties of series and parallel circuits.
Thanks to MIT for this resource