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Statement of a problem № 10929

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The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of an 850-µF capacitor is 280 V. (a) Determine the energy that is used to produce the flash in this unit. (b) Assuming that the flash lasts for 3.9 × 10-3s, find the effective power or "wattage" of the flash.




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