About This Lesson
Instructions on how to make a photocell using some copper foil; salty water; a piece of copper wire; two leads and a millivoltmeter. It shows how you can test it; too. And it works; even with low ability groups.
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Instructions on how to make a photocell using some copper foil; salty water; a piece of copper wire; two leads and a millivoltmeter. It shows how you can test it; too. And it works; even with low ability groups.