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How to Test the Efficiency of a Photovoltaic Cell?
Grade Level: 6th - 8th; Type: Physical Science/Mathematics
The performance of a photovoltaic cell (solar cell) is measured in terms of its efficiency at turning sunlight into electricity. Much of the light energy is reflected or absorbed by the material that makes up the cell. Because of this, a typical commercial photovoltaic cell has an efficiency of 15% or about one-sixth of the sunlight striking the cell generates electricity. The research aspect of this science fair project is to determine how much of the energy from the Sun that reaches a photovoltaic cell is converted into electric power.
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