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Nelson Thornes
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Investigating an Electronic Flash
From Nelson Thornes, this resource helps students studying physics at post-16, A2 level. They help students to review their knowledge and understanding of the discharge of a capacitor to an electronic flash. Students calculate time constants and use them to find capacitance and resistance, as well as drawing a decay curve. They are challenged to explain how ionisation and excitation occur within the flash, in a similar way to a fluorescent tube, and estimate the number of photons emitted from the energy stored in the capacitor.
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