Charging circuit for the flash system of a camera


Question: The charging circuit for the flash system of a camera uses a 130uF capacitor that is charged from a 250V power supply. What is the most resistance that can be in series with the capacitor if the capacitor is to charge to at least 88% of its final voltage in no more than 8.0s?

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Physics: Charging circuit for the flash system of a camera
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