Electric Charge |
Discussion |
Streaming |
Download |
Demo Page |
Electroscope
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As the charged rod is brought close to the knob, opposite charges are attracted by it into the knob. This leaves the post and silver leaf with the same charge. Thus, the repel each other and the leaf moves out. |
Real
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Real
MPG |
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Electrostatic Balloon
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A charged balloon will stick to a wall. |
Real
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Real
MPG |
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Electrostatic Pom Pom
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In the presence of a charged rod, a tissue pom pom will puff due to the repulsion of the ends. |
Real
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Real
MPG |
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Electrostatic Pith Balls
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Pith balls can be attracted to the rod or can be made to repel each other. |
Real
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Real
MPG |
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Wimshurst Machine
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Static charge buildup can be seen as sparks between the two knobs. |
Real
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Real
MPG |
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Wimshurst Machine; charged bells
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Static charge buildup on the bells attracts small metal balls, making them ring. |
Real
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Real
MPG |
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Wimshurst Machine; hail storm
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Static charge buildup on the bottom plate repels small balls, making them jump. |
Real
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Real
MPG |
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Van de Graaff
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The Van de Graaff builds up a high static charge so that electric fields and charge transfer effects can easily be observed. Notice that the spark would prefer to jump to a point rather than a ball; hence, lightening rods attract lightening |
Real
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Real
MPG |
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Electric Force and Coulomb's Law |
Discussion |
Streaming |
Download |
Demo Page |
Electrostatic Ruler
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The force between the two charges can be used to turn the ruler. |
Real
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Real
MPG |
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Electrostatic Yard Stick
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The force between the two charges can be used to turn the yard (or meter) stick. |
Real
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Real
MPG |
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Electric Current |
Discussion |
Streaming |
Download |
Demo Page |
Conduction in Liquids
 |
A bulb has two probes that make an open circuit when initially plugged into the socket. Placing the bulbs into ordinary tap water does not complete the circuit. However, add a dash of salt, and the ions are free to carry current, closing the circuit and making the light glow. The more salt, the brighter the bulb. |
Real
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Real
MPG |
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Electric Circuits and Ohm's Law |
Discussion |
Streaming |
Download |
Demo Page |
Fuse Wire
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A piece of fuse wire is attached between two posts, completing the circuit. Light bulbs, in parallel, are added to the circuit by screwing them into their sockets. When the current load is too much for the wire, the fuse wire will burn and break, "blowing" the fuse and protecting the circuit. |
Real
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Real
MPG |
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Power and Energy in Electric Circuits |
Discussion |
Streaming |
Download |
Demo Page |
Short a Capacitor
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A large capacitor is charged through a resistor and then is shorted by touching the leads together. It gives a resounding CRACK and bright flash of light due to the quick loss of potential. |
Real
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Real
MPG |
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AC and DC |
Discussion |
Streaming |
Download |
Demo Page |
AC and DC Generator
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This motor can be set up to produce both AC and DC currents. |
Real
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Real
MPG |
E and M
5K40.40
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