Model for Electric Circuits |
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| CATEGORY: Physics Education |
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| TARGET: Elementary school students (4-6th Grade) Junior high school Students (8th Grade) |
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| Analogy: mini-lamp(resistor) =： Waterwheel. Battery =: Boy Electricity =: Water Electric current =: Flow of water Voltage =: Level of water |
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| How to express the phenomena Model-1 Simple Circuit: |
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| Model-2 Simple Circuit When a battery is exhausted, …. |
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| Model-3 Two batteries are connected in series. When two boys are placed in series, water can be lifted higher. So the speed of the waterwheel increases. |
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| Model-4 Two batteries are connected in parallel. When two boys are placed in parallel, the level of water is the same as Model-1. So the speed of the waterwheel is the same. However, two boys will not be tired so fast. |
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| Model-5 Two resistors are connected in series. When two waterwheels are placed in series, the water cannot flow smoothly. So the speed of the waterwheel decreases. |
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| Model-6 Two resistors are connected in parallel. When two waterwheel are placed in parallel, the water flows as smoothly as Model-1. Since water can move through two paths, boy has to lift up more frequently. Thus, the boy will get tired in short time. |
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