Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538
Demonstrations are cataloged according to PIRA Bibliography
PLEASE REQUEST DEMOS WELL IN ADVANCE
Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.
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video - Capacitor Discharge
Purpose:To show that energy is stored in a capacitor.
We have two capacitors. A smaller silver 14,000 μF and a larger blue 90,000 μF. Charge the capacitor with the set of 9V batteries (80V). The small one charges up within 3 seconds, the larger one within 10 seconds. Brace yourself, touch one of the capacitor terminals, then with a "switch" like action, swing down the screwdriver to make contact with the other terminal. The large blue capacitor is much louder.
Hints:These are polarized capacitors. You must hook the batteries up to the capacitor red to red (pos) and black to black (neg).