Hand Battery
Operation: 1. Grip any one metal bar tightly with both hands; observe whether the galvanometer pointer deflects; 2. Switch to grip two metal bars, and observe changes in the direction and angle of the pointer deflection. Function Overview: The exhibit consists of 3 metal bars and a galvanometer. It includes three materials: steel, copper, and aluminum bars, each connected to the electrodes of the galvanometer. When the visitor holds two metal bars of different materials with left and right hands, the galvanometer pointer deflects, indicating that an electric current is generated. Scientific Principle: The deflection of the pointer indicates that current is passing through the ammeter, so how is the current generated? The basic composition of a battery requires positive and negative electrodes and an electrolyte. In this exhibit, different metal bars serve as the positive and negative electrodes, and sweat on human hands acts as the electrolyte, forming a simple battery. The chemical activity of the positive and negative electrodes differs; the negative electrode is more active than the positive electrode. They undergo chemical reactions with sweat, generating electricity. Therefore, when both hands hold different metal bars, the ammeter pointer deflects, and it deflects toward the positive electrode of the hand battery. The three metal bars on the platform are steel, copper, and aluminum bars. Try several times; can you determine which of these three metals has the most active chemical properties and which is next? You can try making a potato battery or fruit battery with such metal sheets.
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- 0.9×0.6×1.20 0.9×0.6×1.20Overall Dimensions: 0.9×0.6×1.20 Brand: PopsciCat Model: PopsciCat-Medium-056 Materials: ① Platform: 2.0mm cold-rolled steel plate, dimensions not less than 0.75×0.45×0.7m, surface baked paint (or electrostatic powder coating), reserved foot openings for later height adjustment and four-leg balance, reserved AC female socket position for power supply to electrical exhibits ② Tabletop: High-quality flame-retardant fiberglass reinforced plastic, total thickness with edges ≧100mm ③ Instruction sign: Acrylic UV high-precision printing, thickness ≧3mm ④ Maintenance door: 2.0mm cold-rolled steel plate, surface baked paint (or electrostatic powder coating) Main Configuration: ① Galvanometer: Custom-made Energy Requirements: None
Operation: 1. Grip any one metal bar tightly with both hands; observe whether the galvanometer pointer deflects; 2. Switch to grip two metal bars, and observe changes in the direction and angle of the pointer deflection. Function Overview: The exhibit consists of 3 metal bars and a galvanometer. It includes three materials: steel, copper, and aluminum bars, each connected to the electrodes of the galvanometer. When the visitor holds two metal bars of different materials with left and right hands, the galvanometer pointer deflects, indicating that an electric current is generated. Scientific Principle: The deflection of the pointer indicates that current is passing through the ammeter, so how is the current generated? The basic composition of a battery requires positive and negative electrodes and an electrolyte. In this exhibit, different metal bars serve as the positive and negative electrodes, and sweat on human hands acts as the electrolyte, forming a simple battery. The chemical activity of the positive and negative electrodes differs; the negative electrode is more active than the positive electrode. They undergo chemical reactions with sweat, generating electricity. Therefore, when both hands hold different metal bars, the ammeter pointer deflects, and it deflects toward the positive electrode of the hand battery. The three metal bars on the platform are steel, copper, and aluminum bars. Try several times; can you determine which of these three metals has the most active chemical properties and which is next? You can try making a potato battery or fruit battery with such metal sheets.