Today, we dealt with a different theme of physics: electricity. In the lemon battery, a chemical reaction takes place, and the copper penny's valence electrons move to the better conducting zinc screw. This change in electric potential creates a voltage. The current flows from a positive voltage, approximately 0.2 V, to a negative voltage, which is about zero.
Sunday, March 14, 2010
Lemon Battery
Today, we dealt with a different theme of physics: electricity. In the lemon battery, a chemical reaction takes place, and the copper penny's valence electrons move to the better conducting zinc screw. This change in electric potential creates a voltage. The current flows from a positive voltage, approximately 0.2 V, to a negative voltage, which is about zero.
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